Total Average Net Distribution: 71,632 Certification period 1 January 2018 - 31 December 2018
July/August 2019 Volume 35 No.7
Regulars 3 VIEWPOINT 5 NEWS 18 THE CODEBREAKERS 26 MADE 2 MEASURE 33 ENLITENED 39 MK ELECTRIC 100 YEARS 64 PRODUCTS IN PRACTICE 88 CAPTAIN C-TEC 93 CAUGHT ON CAMERA EXTRA
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News & Views 13 NAPIT and SparkSafe announce a new industry collaboration
Technical & Training 21 Installation of electric heating cables 24 18th Edition: a year of changes and challenges
28 Circuit-breaker standards: what’s the difference? How to help your customers ‘set the scene’ with their outdoor lighting
30 Rounding-up the latest training news from the industry
33 Why is dimming at low levels causing you issues?
Products & Business Solutions
39
53 How to make the most of outdoor
35 High protective conductor currents
entertainment solutions this summer
54 Garden lighting ideas and
Electric Vehicle Special
concepts explained
43 How can contractors benefit from the EV opportunity?
57 Why it’s vital that fire-rated downlights are rigorously tested
44 Jeff Jones puts a new MFT with EV testing accessory through its paces
61 How does heat recovery ventilation work?
47 EV charging: the key technical elements electricians need to know
48 Why are transformers important for
latest summer workwear
EV charging installations? Entertaining new ideas this summer
Competitions & Giveaways
68 Pete Monfort reviews the T150 tester from Fluke
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MK Electric: 100 years of quality
67 Steve Hewish slips into Snickers’
10 WIN Bag a Bosch thermal camera
Milwaukee’s M12 FUEL sub compact ¼” hex impact driver is put to the test
73 Rounding-up the latest new products and additions to the electrical market
16 WIN Superb C.K prize packs to be won
40 WIN Loads of great goodies are up for grabs
58 WIN A Toshiba LED HDR 4K Ultra HD Smart TV could be yours
PROFESSIONAL ELECTRICIAN July/August 2019 1
@proelectrician
professionalelectrician
Assistant Editor CIAN BRITTLE email: cbrittle@hamerville.co.uk Digital Manager RUTH WILLIAMS email: rwilliams@hamerville.co.uk Digital Assistant REBECCA MCGEOCH Advertisement Manager ANTHONY SCOTT email: ascott@hamerville.co.uk Assistant Advertisement Manager IAN TURNER Design ADEEL QADRI Production Assistant KERRI SMITH Group Production Manager CAROL PADGETT Distribution Manager KARL CLARK Managing Editor TERRY SMITH Publisher BRYAN SHANNON Printed by: WALSTEAD PETERBOROUGH Published by: HAMERVILLE MEDIA GROUP Regal House, Regal Way, Watford, Herts, WD24 4YF Tel: 01923 237799 Fax: 01923 246901 Email: pe@hamerville.co.uk PROFESSIONAL ELECTRICIAN is the business journal for the electrical contracting industry. It is available to the trade at leading electrical wholesalers throughout the UK. © 2019
Subscriptions to PROFESSIONAL ELECTRICIAN are available at the following rates: UNITED KINGDOM 1 year (11 issues) — £30 post paid EUROPE and OVERSEAS 1 year (11 issues) — £50 post paid AIRMAIL 1 year (11 issues) — £65 post paid
Image References (Adobe Stock): Pg 43 EV Charging © Bizoo_n Pg 94 More Info © Momius
Professional Electrician, Regal House, Regal Way, Watford, Herts, WD24 4YF
Editor’s Viewpoint
Meet the team Editor RICHARD BOWLER email: pe@hamerville.co.uk
pe@hamerville.co.uk
‘No’ seems to be the hardest word aking time off work is never easy; as relaxing and rejuvenating as the idea sounds, it never seems to go quite to plan. And, in an industry where the majority are self-employed, it becomes even harder to justify. The stress of having to simply catch-up on emails is significantly increased when electricians have the pressures of missing out on potential customers and income – uttering the word ‘no’ can appear implausible. This exact topic came up on a recent #TradesTalk chat on Twitter, with many reluctantly admitting to work taking precedence over everything else. The chat also covered how difficult it was to switch off, even when you’re on holiday. With the regularity that customers use social media and instant messaging these days to get instant answers and quotes, it becomes a very difficult dilemma to voluntarily ignore your phone in order to switch off. Yet, taking a break is vital to wellbeing and the benefits should not be overlooked. In an industry where stress levels are rarely below high, it can make a significant difference to your mental health – even if you may not realise it at the time. While work can dry up a little in the warmer months, there are many electricians we speak to who are constantly busy, working from early morning until late at night. Inevitably, this does come with the territory, but overworking yourself can quickly become an issue before you know it. Indeed, The World Health Organization announced recently that burnout has been included in the 11th Revision of the International Classification of Diseases (ICD-11) as an occupational phenomenon (although it is not classified as a medical condition), and is characterised by three dimensions:
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● feelings of energy depletion or exhaustion; ● increased mental distance from one’s job, or feelings of negativism or cynicism related to one’s job; ● reduced professional efficacy. While these symptoms may not affect you currently, the longer you put off a break or continue to overwork yourself, the more likely they are to have an impact. And don’t forget to look out for others, either. Whether it’s a colleague or simply a friend you speak to at your local wholesaler, it might be worth checking in with them. Understanding and appreciation of mental health has come a long way in the construction industry in recent times, but overworking to the extent of burnout isn’t always at the forefront of this discussion. And it’s not only the health of yourself, but also the health of your business that could be improved. Sometimes, taking some time off allows you to take a much-needed step back and reassess what’s working, and what isn’t. As a Watford-based publisher it would be remiss of us to argue with the lyrics of Sir Elton John, although it appears that ‘no’ actually seems to be the hardest word, for tradespeople at least. So make sure you take a break, it is the summer, after all! Enjoy the issue and we’ll see you again in September.
Richard B owler PROFESSIONAL ELECTRICIAN July/August 2019 3
news @proelectrician
For the latest electrical news visit www.professional-electrician.com
professionalelectrician
pe@hamerville.co.uk
Professional Electrician, Regal House, Regal Way, Watford, Herts, WD24 4YF
Former marine takes apprentice awards crown Richard Bradley has been named the 2019 NICEIC and ELECSA Electrical Apprentice of the Year. The 31-year old from Southport, Merseyside was one of eight competitors to reach the Grand Final, which was held at the head office of the competition partner – Scolmore Group. The final was the third stage of the contest, which saw more than 1,000 apprentices from across the UK take part. Richard studied electronics as part of his apprenticeship with the Ministry of Defence. He is currently working towards his NVQ Level 3 Qualification in Electrical Installation at a local training centre. “I was so surprised when they said my name. I thought they called the wrong person. I don’t think I’ve ever been so shocked,” said Richard. “I entered the competition after recently being medically discharged from the marines. I needed to find a career that was similar to the work I was doing but could also help me develop as a person and support my family. “Being part of the competition has been such a rewarding experience. I’ve got to work alongside some amazing finalists. It has given me more confidence in my ability and I’m extremely proud of what I have achieved. Now, I intend to push forward and keep challenging myself.” As the overall winner, Richard was presented with a holiday voucher worth £2,000. Runner-up Cameron Molloy
received a holiday voucher worth £750, while third place went to James Martin-Lucraft who received a £250 holiday voucher. All eight finalists were given an engraved glass trophy, an iPad and kit bag containing an array of Scolmore electrical accessories. The eight finalists were put through a series of challenges across a range of disciplines, including insulation resistance testing, earth loop impedance testing, safe isolation and a conduit challenge. Each candidate also had to undergo a technical interview with Certsure’s former Technical Standards Director, Alan Wells. The winners were then announced at an awards ceremony at the nearby Belfry
Hotel. Handing over the prizes were Kevan Parker, Managing Director at Certsure, Martyn Walley, Group Technical Director at Scolmore Group, and Billy Byrne, star of TV’s DIY SOS. Darren Staniforth, Senior Technical Development Manager at NICEIC and ELECSA, said: “This is the fourth year that we have run the competition and the standards are getting higher each year. That is encouraging for the industry as a whole.”
ECA appoints new Technical Director Highly respected electrical engineer and business leader Mike Smith (pictured) has joined the ECA as Director of Technical. Mike previously held a variety of commercial roles at SES Engineering Services over the past 25 years and was most recently the firm’s Estimating & Sector Director, working on projects totalling tens of millions of pounds. From 2017 to 2018, Mike was also ECA President, driving forward the interests of the sector, by helping it face the challenges of Brexit, unfair payment practices and skills shortages. He said: “I’m delighted to be joining ECA in
this exciting role, having supported the association in various capacities over the past 20 years. I’m looking forward to using my industry knowledge to help ECA members grow their businesses and navigate the challenging commercial environment.” ECA’s technical team also includes Gary Parker, Luke Osborne and Darren Smith, as well a range of specialist associates, who collectively have expertise covering the full range of electrotechnical disciplines, including electrical, energy, fire and security, smart buildings and data communications. PROFESSIONAL ELECTRICIAN July/August 2019 5
news
For the latest electrical news visit www.professional-electrician.com
Lighting expert to head up new company Scolmore has made a significant investment to develop a dedicated lighting company – OVIA – that will allow it to extensively broaden its product offering. The company is delighted to have secured well-known and highly respected lighting industry operator, Mike Collins (pictured), who moves from Ansell Lighting to head up the new OVIA company. Having spent his entire working career within the electrical industry, Mike brings with him a wealth of experience and knowledge, garnered during his time working within both wholesaler and manufacturer environments. With OVIA due to be officially launched later this year, Mike is focussing his efforts on an extensive research and development programme to create a comprehensive lighting product offer that will meet the requirements of the new
sectors the company will be targeting. These include Commercial, Industrial, Utility, Amenity Emergency Lighting and Floodlighting. A team of experienced sales reps are being recruited over the next few months to create a network of talent to take the new OVIA offering out to customers across the UK. The name OVIA is already well-known within the industry having been introduced by Scolmore in 2011 as the umbrella brand for the company’s growing lighting collection. Commenting on the new developments for the business, Scolmore Group MD, Gary Mordue, said: “Whilst operating as a totally separate limited company, OVIA will have the full backing and support of the
Scolmore Group. This joint partnership will continue to guarantee our customers a range of high-quality, value-for-money products backed up by excellent local stocks, delivery service and the ability to offer detailed product support via trained staff and installer training.”
@proelectrician
professionalelectrician
pe@hamerville.co.uk
Professional Electrician, Regal House, Regal Way, Watford, Herts, WD24 4YF
Clarkson Evans wins ECA contractor award New-build house wiring specialists Clarkson Evans have scooped the prestigious Large Contractor of the Year trophy at the ECA Awards. Judges from the ECA singled out Clarkson Evans from amongst some of the most established businesses in the sector, and were particularly impressed by the company’s commitment to delivering high quality customer service, and to developing staff through its in-house apprenticeship programme. Managing Director, Nathan Evans said: “What a fantastic achievement! It just shows what a brilliant team of staff we have here and I’d like to thank every single one of them, at every one of our 20 branches, for doing their jobs really well, day in and day out.” Clarkson Evans is the largest electrical contractor serving the new-build housing sector, having wired over 21,000 properties
in the last year. Headquartered in Gloucester and with 20 branches nationwide, the company directly employs over 900 staff (not subcontractors) and trains large numbers of apprentices. “We’re particularly proud to have received this award because it means so much in the electrical industry”, said Nathan. “We’re proud of what we do but we don’t take anything for granted and such national recognition means a lot to us.”
To keep up-to-date with news from Clarkson Evans visit: www.clarksonevans.co.uk
PRIZE DRAW
WIN A BOSCH THERMAL WIN CAMERA! This month's prize from Bosch Professional promises to improve your vision and shoot you ahead of the competition.
o help to get your summer off to a sizzling start, one winner will bag a quality Bosch GTC 400 C Professional Thermal Camera this month. Designed specifically for trade professionals, it makes your work easier, quicker and more efficient – and adds an extra dimension of professionalism. Underlying issues which are invisible to the naked eye show up clearly within the camera’s thermal vision range of -10° – +400°. The infrared sensor with 19,200 measuring pixels provides an exceptionally sharp heat distribution image with temperature measurements displaying highest and lowest temperature points.
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Non-thermal images are automatically taken when thermal images are taken to provide comparison reports for your customer. You can also superimpose a thermal image over a normal image to help identify issues in the area you are measuring. Measurement takes seconds, issues are identified and easily understood. Bosch connectivity allows rapid, wireless transmission of images and data to your smartphone or tablet via an inbuilt WiFi Hotspot and the Bosch Measuring Master App. You can share them immediately,
10 July/August 2019 PROFESSIONAL ELECTRICIAN
even while you’re still on-site. Using the micro USB and the GTC transfer software, you can quickly move your thermal images and normal images to your computer and on to your customer in a report format. With this camera’s intuitive interface, it’s easy to measure precisely and produce professional pictures and reports that help to explain the issue to customers. For more details on Bosch power tools and measuring devices, visit: www.bosch-professional.com
HOW TO ENTER To be in with a chance of winning the Bosch GTC 400 C Professional Thermal Camera, simply go to: www.rdr.link/eg001, and fill out the contact form. Alternatively you can enter at: www.professional-electrician.com/win. Deadline for entries: 31/08/2019. Usual T&Cs apply.
NEWS SPECIAL
“WE'RE COLLABORATING FOR THE GOOD OF THE INDUSTRY” After the announcement of a collaboration between the two companies at ELEX in Harrogate, NAPIT’s Mike Andrews and Derek Thompson of SparkSafe provide more detail about what the partnership will mean for the electrical industry. parkSafe is an independent system which is designed to connect the competency of electrical workers to client projects. It emerged from the Electrical Training Trust (ETT), a charity based in Northern Ireland. SparkSafe launched its Licence to Practise (LtP) initiative in 2013. As Derek Thompson explains: “SparkSafe shows the connection between the client, the main contractor and electrical sub-contractor. It also shows the identity and electrical qualification of the person carrying out the work. What NAPIT is adding to this is the on-site assessment. NAPIT has a team that can go out and examine workers in the real world, not a simulated world. They observe them to a UKAS and EAS standard. At SparkSafe, we’re not able to do that, so this co-operation is really
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unique. Our industry is very fractured, and what you’ve got here is someone stepping in and saying: ‘For the common good of the industry, we’re going to do something new here’.” Mike Andrews expands: “This is quite unique to the industry, and when you refer it back to other current systems in place, the only bit that’s really assessed through those is health and safety. There’s no assessment to make sure the individual is competent for a qualification-based
“We’re going to be focusing on client bodies. The industry isn’t terribly well behaved at the lower levels, not everybody wants to volunteer to incur more legislation and regulation in terms of how they operate.” card. The system that we’re bringing together is the qualifications on top of the competence element to make sure the individuals can actually do the job.” On top of this, both parties want to ensure there is continual assessment of electrical workers. He continues: “With other systems operating currently, there’s no requirement to renew any of your qualifications – the only requirement is being 18th Edition compliant. I honestly hope others in the industry follow our lead, as what we’re looking at doing is raising the standard of the sector. If others look at it and think it’s a good model and decide to follow suit, then I wouldn’t say that’s a bad thing.” However, he stresses: “It’s not a competent person scheme; it’s a UKAS-accredited certification body. NAPIT does offer a competent person scheme, but that is totally aside from this.” There are tens of thousands of unqualified, under-qualified and self-designated workers within the UK’s electrical industry supply chain. Around 200,000 UK electrical workers operate outside of any common regulated system and there is currently no legal requirement for electrical workers to be registered where their qualifications and technical competence is verified.
SparkSafe’s unique online system creates a connection between each electrical worker via their employer to Client projects. The online system requires electrical workers to register for one of three Licence types. These are: QE (Qualified Electrician), REW (Registered Electrical Worker) and AE (Apprentice Electrician). Derek Thompson has also exclusively revealed there will be a fourth licence type coming soon. He said: “The fourth licence type is essentially a qualified electrician ‘plus’ and it would be a matter of months before we bring this licence type in.” Mike Andrews expands: “There’s going to be recognised qualifications. When we say you need to reach a certain level, however, it’s not going to be for everybody. There’s individuals that have done short-form courses and are registered with certain organisations; this is not for them. This is for the qualified workforce, and they don’t necessarily need to have completed an apprenticeship – we’ll be bringing in mature students, but we’ll expect them to have certain levels of qualifications.” When it comes to putting a plan into place to ensure the collaboration is as successful as possible, Derek Thompson explains: “We’re going to be focusing on
14 July/August 2019 PROFESSIONAL ELECTRICIAN
client bodies. The industry isn’t terribly well behaved at the lower levels, not everybody wants to volunteer to incur more legislation and regulation in terms of how they operate. So, we’ve got to try and persuade clients, and that’s been the success story in Northern Ireland. We have managed to persuade the public sector to specify £1 billion of public sector work under SparkSafe.” He continues: “If we can persuade clients and help them think responsibly about how they procure electrical services, that’s how we’ll win. The client then motivates the electrical contractor to do better things, and the idea is we’ll then see main contractors who are bidding for government work, as well as large private sector work, who only employ licenced electrical workers.” Derek concludes: “We want this system to favour responsible contractors and responsible workers. We want to try to reward, incentivise and motivate those two groups of people to do better things. Training is an essential part of that, and both ourselves and NAPIT share the values of continual professional development in the industry.” We'd love to hear your thoughts on this new partnership and whether you believe it will represent a postive step for the industry. Email your views to pe@hamerville.co.uk and we'll share them in a future issue of the magazine.
PRIZE DRAW
W IN
5 C.K PRIZE PACKS TO BE WON! Lucky entrants will get their hands on the new C.K Pocket Socket Set & C.K Ratchet Spanner Set of 7. .K offers a fantastic range of innovative tools, all engineered to offer leading performance, durability, accuracy and strength. Two new exciting introductions to the range are the C.K Pocket Socket Set ¼” Drive 28pc (T4654) and the C.K Ratchet Spanner Set of 7 (T4344M7ST) – with great features and benefits to more than meet the needs of professional trades.
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C.K Ratchet Spanner Set of 7 Featuring drop forged chrome vanadium steel, this spanner set is hardened and tempered for strength and durability. It includes a 72 teeth ratchet
mechanism with fine 5” adjustment arc for working within confined spaces, all supplied in a wall-mounting rack for convenient storage. Sizes on offer are: 8, 10, 12, 13, 15, 17 and 19mm. C.K Pocket Socket Set ¼” Drive 28pc Made from chrome vanadium steel, these sockets are non-slip satin chrome plated for resistance to rust and peeling. The set features ‘Sure-drive’ sockets which apply torque to the flat of the nut, rather than the corners to avoid rounding off, as well as a pocket-sized impact resistant storage case. Contents include: ¼” sockets (4,4.5,5,5.5,6,7,8,9,10,11,12,13,14mm); ¼” x 25mm bit adaptor; ¼” 50mm extension bar; ¼” x 72 teeth ratchet handle; ¼” x 25mm bits (PH 1,2,3; PZ 1,2,3; TX 15,20,25; HEX 4, 5 and 6mm). For more information visit: www.carlkammerling.com
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HOW TO ENTER To be in with a chance of winning one of these fantastic C.K prize packs, simply go to: www.rdr.link/eg002, and fill out the contact form. Alternatively you can enter at: www.professional-electrician.com/win. Deadline for entries is 31/08/2019. Usual T&Cs apply.
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CODEBREAKERS JAMIE BEST: The client complained of a funny smell and lights flickering. This CU was fitted as part of a kitchen refurb. I have to say, that’s a first for me!! I’ve seen a few “alternative” bus bars used when the OEM parts weren’t available for whatever reason, but here we have the correct part (bus bar) which has been fitted incorrectly. I can only assume that a lack of experience or knowledge of this equipment type, and good working practices were the overriding issue here. The section of bus bar to the right of this seems to be fitted correctly, so I’m lost for words as to how the fitter has installed the offending burnt section so incorrectly. Instead of using the correct terminal area to secure the bus bar, the actual exterior screw head of the circuit breaker (CB) terminal has been used. Attaining the correct torque in this instance is virtually impossible, as the two surfaces aren't designed for this kind of joining. The resulting failure to use the correct termination, and torque, has resulted in overheating and damage, due to loose connections. This could easily have started a fire.
LEE TAPPING: We manage a social housing contract and come across many concerning finds. This has to be one of the stupidest things I’ve seen in a while. I’m not quite sure what’s gone on here, but I can guess it was one of the following (poor) excuses: 1. RCD is faulty and keeps tripping – so remove it, 2. Circuits on one of the RCD protected sides of the high integrity board are tripping the RCD – so remove it, 3. Lost the second RCD – so improvise. At first glance, most won’t spot the issue here, so fair play to Lee’s vigilance. The area in the red circle has two 32A type B CBs, which have been used to substitute one of the RCDs in a high integrity type CU. For whatever reason this has been done, it is extremely dangerous. The circuits placed on the side with the missing RCD now have no additional protection. If the RCD was tripping because a circuit or appliance caused it to trip, and this hasn’t been investigated, the fault is likely to be there still. More dangerously, there is now a fused neutral. If the load on the modified side exceeds the 32A device in the neutral conductor, which then operates, the circuit will still be live unless the live conductor CB is isolated. This is an incredibly dangerous and foolhardy modification.
The Observations, Regulation infringements and Codes applicable to this observation would be. Poor workmanship; failure to correctly fit manufacturers equipment in line with their instructions
134.1.1
C2
Incorrect connection of conductors i.e. bus bar
134.1.4
C2
Overcurrent protection device fitted in Neutral conductor
132.14.1
C2
Thermal damage, likely to cause damage to property by fire
651.2(ii)
C2
No Additional protection (RCD) for socket-outlets
411.3.3
C2 C3
The Observations, Regulation infringements and Codes applicable to this observation would be.
GET THE BOOK AND CRACK THOSE CODES! New for BS 7671:2018, NAPIT’s EICR Codebreakers publication is purpose-written to aid contractors, inspectors and clients, and now includes updates to align with the 18th Edition of the wiring regulations. A 2018 Professional Electrician & Installer ‘Top Product’ award winner, the book is the perfect technical aid for electrical professionals and their customers.
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Need help with cracking those all-important EICR codes? Every month the technical team at NAPIT will be studying your latest ‘Caught on Camera’ photos and offering advice on the next steps, should you find a similar installation. If you want the team at NAPIT to help crack your codes then send your pictures through to us at: pe@hamerville.co.uk
MARK FITZGERALD: Came across this beauty on a job in Esher. Old DB? No barriers? Just use a fast fix back box instead! Well, what can I say, there are modifications, and then there are “modifications”! The manufacturer may not allow this kind of modification to its boards, and we should stress that it shouldn't be done. In this case, however, we have to look at the merits of the modification and the location. This dry lining type pattress box is being used in the absence of the correct barrier, which is most likely just a plastic shroud. The modification doesn’t appear to have any IP issues and carries the original warning notice in a similar position. There doesn’t appear to be any structural modifications to the DB, and after the DB front panel is re-fitted and the door closed/locked, it’s unlikely the “pattress barrier,” will present a problem to the installation users. Although this is a little tongue in cheek observation, on a serious note, the manufacturer has an absolute say over the compliance of it. There is no guarantee that the material used to construct the pattress box is of the correct rating for the DB, or that any vent ways and holes won’t cause an issue if a device operates. The correct type testing has not been carried out, so we must code according to the level of immediate or future threat. In this particular instance, with the information presented to us, I don’t see it as a huge future threat. Where obsolete switchgear may no longer have factory spares back-up, it is not necessarily the end of the line, but that doesn’t mean I condone these types of modifications in any way. The Observations, Regulation infringements and Codes applicable to this observation would be. Failure to correctly fit manufacturers equipment in line with their instructions
134.1.1
MORDECAI DANISA: I was asked to quote to replace a badly burnt fuse HRC in Sheffield and got the shock of my life – 2.5 T&E being used, no water mains bonding or even gas mains. The 80-year-old homeowner said the shower was Ok at first but stopped working after the fuse burnt out. Unfortunately, this is probably one of the most commonly seen DIY modifications and can be exacerbated further when end of life shower units are changed for a bigger, more powerful type. The risk of thermal damage and fire is very high. If the shower is used for a continued period, the 2.5mm2 conductors are likely to overheat, and their insulation will degrade, exposing the bare conductors, which can then go on to do much more severe damage. On closer inspection, it seems the CPC has not been used/connected to the shower’s earthing terminal, so most likely has no form of fault protection. The connection made under the red tape is also unlikely to be rated for the current it will be expected to take and will also be a weak point that could fail. The manufacturer’s instructions aren't likely to have been followed or taken account of, so any warranties may well be void. The Observations, Regulation infringements and Codes applicable to this observation would be. Poor workmanship and failure to install an electric shower, taking account of manufacturer’s instructions Incorrectly sized shower supply cable In-adequate cable joint within shower unit
C3
CPC not taken to each point in a circuit
To find out how you can order your copy of the updated 18th Edition Codebreakers publication, priced at just £19.99 (non-members) or £17.99 (NAPIT members), visit: www.napitcodebreakers.co.uk
134.1.1
C2
133.2.2, 523, 433.1.1
C2
133.2, 134.1.4
C2
411.3.1.1
C2
Technical & training
TAKING YOU STEP BY STEP THROUGH PROCEDURES AND REQUIREMENTS FOR ELECTRICAL INSTALLATIONS
Installation of electric heating cables
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his article looks at the requirements and considerations for a contractor when installing electric heating cables and systems within walls, floors and ceilings located within domestic dwellings. This article does not preclude other similar types of environment or alternative installation methods. Introduction Section 753 of BS 7671 contains specific requirements for the installation of embedded heating systems which supplement the general requirements of that standard. Additionally, Sections 701 and 702 contain further requirements applicable to the installation of such systems in locations containing a bath, shower or a swimming pool respectively. Any requirements relevant to a particular installation must be met before undertaking such work, for example, determining the adequacy of supply characteristics including earthing and bonding (Regulation 132.16). Additionally, the recommendations of manufacturer’s instructions should be taken into account, including the nature of any adjacent materials liable to come into contact with the heating source and the local building regulations. Types of heating cable elements. Electric heating cables operating at 230 V commonly used in locations such as bathrooms, kitchens and the like are at risk of becoming damaged during installation thereby increasing the risk of an electric shock and/or fire. Suitable precautions must be taken to prevent accidental
damage occurring before the final installation of the floor covering, screed or tiles. Although damage is most likely to arise from the penetration of metallic fixings such as nails and/or screws during final fixing, for example, the installation of carpet grip or bathroom furniture. Regulation 753.511 recognises two types of heating element:
•
•
Flexible sheet heating elements complying with the requirements of BS EN 60335-2-96 – Household and similar electrical appliances - Safety. Particular requirements for flexible sheet heating elements for room heating, as shown in Fig 1 (a). This allows for greater flexibility and a faster installation time. Individual heating cables manufactured to the requirements of IEC 60800 – Heating cables with a rated voltage of 300/500 V for comfort heating and prevention of ice formation, as shown in Fig 1 (b). This type of cable typically incorporates a metallic sheath or braid which is utilised as a protective earthed covering for the circuit.
Other types of heating system having no provision for an exposed-conductive-part
(a) Flexible sheet heating elements
FIG 1
(metallic covering) are available; in which a separate conductive covering or metallic grid shall be employed and placed over the floor heating cable, likewise, under the ceiling heating cable. Furthermore, Regulation 753.411.3.2 requires the maximum spacing between the metallic grid to be no greater than 30 mm where it shall be connected to the circuit protective conductor for the circuit, except where the protective measure is of SELV (Regulation 701.753) or the cable is of Class II construction. Protection against mechanical damage As required for other electrical circuits, cables must be suitably selected and installed for any external influences that may affect operation during normal usage, such as dampness or corrosion (Regulation 554.4.2). Mechanical stresses impacting on heating cables caused by sharp objects, impact from tools or the effects from tension and compression expected during installation shall also be avoided (Regulation 522.6). Where a cable is intended to be installed within the fabric of the building, embedded in concrete, flooring screed or similar it must be suitable for burying and have a degree of protection not less than IPX7
(b) Individual heating cable
Heating cables
PROFESSIONAL ELECTRICIAN July/August 2019 21
Technical & training for floors or, IPX1 for ceilings. Likewise, for reliability cables must be completely embedded within the surrounding substance which is to be heated; any small voids (air gaps) appearing around the cable may lead to hot spots and subsequent cable failure (Regulation 554.4.3). Some buildings include joints within walls and floors which are so designed to allow for movement and thermal expansion, Regulation 753.515.101 prohibits the installation of cables crossing such joints where there is a potential risk of exposing the heating cable to tension during structural movement. Protection against electric shock Regulation group 753.41 identifies the protective measure of automatic disconnection of supply (ADS), double or reinforced insulation and the method of electrical separation, although this is not permitted for wall heating systems or within certain locations. Typically, the common form of protection for circuits supplying underfloor, wall
and ceiling heating systems will be ADS. An RCD having characteristics complying with Regulation 415.1.1 shall be used for fault protection (I∆n ≤ 30 mA) (Regulation 753.411.3.2). This also meets the requirements of Regulation 753.415.1, the need for additional protection. It is a fundamental requirement of circuit design that overcurrent protection is provided, (Section 430 refers). Typically, in older installations fuses to BS 3036 or circuitbreakers to BS 3871 maybe found. Where this is the case and it is not practical to include RCD protection at the consumer unit a 13 A RCD spur maybe installed locally from an existing circuit as shown in Fig 2. Furthermore, consideration should be given to the power rating of the heating system and the implications affecting the existing circuit (Regulation 433.1.204). It should be noted that the effects from earth leakage currents using screened heating cables may cause unwanted tripping and is more likely to occur where a number of heating elements are supplied through a single RCD.
This is recognised in BS 7671 where Note 2 to Regulation 753.411.3.2 states that limiting the heating power output to 7.5 kW/230 V or 13 kW/400 V downstream of a 30 mA RCD may reduce such risk. Protection against burns Regulation 753.424.201 requires one of the following measures to be applied, limiting the temperature for a specific heating zone to a maximum of 80 ˚C.
•
appropriate design of the heating system,
•
appropriate installation of the heating system,
•
use of protective devices.
Suitable measures shall be taken to avoid floor and ceiling heating systems overheating where it may lead to burns or ignition. In locations where contact with skin or footwear is possible the surface temperature shall be limited to no more than 35 oC (Regulation 753.423). For this reason many manufacturers will limit their products to around 29 oC.
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For other guidance and publications please see the NICEIC website. For information about the NICEIC Approved Contractor or Domestic Installers schemes, visit www.niceic.com or call 0333 015 6626
www.niceic.com 22 July/August 2019 PROFESSIONAL ELECTRICIAN
Under floor heating system having local RCD protection.
TECHNICAL & TRAINING
18TH EDITION: CHANGES & CHALLENGES Remarkably, it’s now a year since the publication of the 18th Edition wiring regulations. ECA’s Senior Technical Support Engineer, Gary Parker highlights some of the more challenging changes, and those December 2018 corrections. he 18th Edition of the IET Wiring Regulations (BS 7671:2018) has been in full effect for several months now. The blue book was first published in July 2018, to allow the industry six months to get to grips with the changes before they came into full effect on 1 January 2019. However, almost a year later, some 18th Edition changes are proving harder to implement than others. Below is a summary of the most frequently asked-about changes on the ECA Member helpline, with a handy note of which section to turn to in the 18th Edition for each one. An important set of corrections was also published in December 2018. More on this later...
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Another change sees the period between testing RCDs (by pushing the ‘T’ or ‘Test’ button) increased from ‘quarterly’ to ‘six-monthly’, which means that the task can be conveniently done when the clocks are changed. Arc fault detection devices (AFDDs) Chapter 42 - protection against thermal effects, Regulation 421.1.7 This new Regulation recommends that Arc Fault Detection Devices are installed to help mitigate the risk of fire in AC final circuits in the event of arc faults. They are recommended for premises with sleeping accommodation, and locations with risk of fire due to the nature
Residual current devices (RCDs) Chapter 41 - protection against electric shock, Regulation 411.3.4 The application of RCDs has been expanded and revised for certain situations. The Regulation now requires that, within domestic premises, additional protection by an RCD shall be provided for AC final circuits supplying luminaires. This was new, and most likely a response to the many new ways we now use lighting in our homes, with the introduction of LEDs, advanced lighting displays, and the fact that consumers are now able to purchase luminaires and put them up themselves.
24 July/August 2019 PROFESSIONAL ELECTRICIAN
of processed or stored materials, such as barns, woodworking shops, or stores of combustible materials. Surge protection devices (SPDs) Chapter 44 - Protection against voltage disturbances and electromagnetic disturbances, Regulation 443.4 This amended section now stipulates that protection against overvoltage by means of Surge Protection Devices (SPDs) has to be provided. This is applicable where the consequence of an overvoltage would result in serious injury or loss of life, serious disruption of public services, interruption of industrial activity, or if it would affect a large number of co-located individuals.
Electric vehicles (EVs) Section 722 electric vehicle charging installations These changes are relatively small, but they will have big implications. Particularly for charging points installed at a dwelling, outside a building, on a TN-C-S earthing system. As with other changes, these are to keep the UK’s standards in tandem with the technical intent of worldwide standards. In the 18th Edition, the option to use a protective multiple earthing (PME) facility has been reduced. There are ways that PME can be used, but these are often difficult to achieve. Therefore, most installations will rely on separation of the earthing system and making the EV a TT system (using an electrode in the ground). Newly recognised types of RCDs are specifically picked up on in section 722 for EVs, but general awareness of these in the wider industry is very low. The new devices are electronic in nature and have a different reaction to circuits containing power electronics that can distort the waveform. The industry and its customers are only just becoming aware of these products, the costs are high in comparison to existing devices, and availability is limited. December’s Corrigendum In December 2018, 11 corrections to the 18th Edition were published in a Corrigendum. These are, in summary: ● Five labels oversized in Section 514; ● A new colour is available to use to identify a functional earthing conductor; ● Update regarding alignment of a zone in Figure 701.1f to match the words detailed in Regulation 701.32.3; ● In medical locations of group 1 and group 2, a minimum of two lighting circuits shall be provided from separate sources of supply; ● Change to the zone markings in Fig 701.1f; ● Appendix 4 last row of the table covers 90 ºC 'thermosetting' cables, and not as thermoplastic cables.
QUICK QUERY: 18TH EDITION CONSUMER UNITS The technical team at Wylex answers a common 18th Edition query that it regularly receives from contractors. Is there such as thing as an ‘18th Edition Consumer Unit’? Consumer units must be configured in the correct way, with the correct devices, to meet the requirements of the 18th Edition. How do you select the right consumer unit? Typically all circuits in domestic household premises will be protected by 30mA RCDs. The most effective way of providing 30mA protection, maintaining power continuity, managing PE currents, avoiding unwanted tripping, and achieving highest levels of occupation safety is to use individual RCBOs on each circuit within the installation. How do you provide SPD and AFDD protection in one unit? The ultimate consumer unit, which caters for the requirements and recommendations of the 18th Edition, will include 100A main switch, a Type 2 SPD and RCBOs with integral AFDD on each individual circuit. You can download a handy poster offering more information on Consumer Units and the 18th Edition by going to: www.rdr.link/eg003
There are a range of other changes within the 18th Edition. You can find out more about the changes, relevant training and other industry updates by going to: www.rdr.link/eg051
PROFESSIONAL ELECTRICIAN July/August 2019 25
Working on your own? Need some technical advice? Don’t know where to turn? Ask Megger. What it doesn’t know about installing and testing electrical systems isn’t worth knowing. Every question will be answered by the Megger Technical Team, and the best will be published in Professional Electrician. So, take advantage of the ‘every question answered’ guarantee today. Email your questions to: meggermeasures@hamerville.co.uk
You asked: I’VE JUST FINISHED TESTING A LIGHTNING PROTECTION SYSTEM USING THE TRADITIONAL THREE-WIRE SYSTEM FOR CHECKING THE RESISTANCE OF EACH OF THE EARTH ELECTRODES. IT TOOK MUCH LONGER THAN I EXPECTED. IS THERE A FASTER METHOD I CAN USE NEXT TIME I DO A JOB LIKE THIS?
26 July/August 2019 PROFESSIONAL ELECTRICIAN
We say: Provided that the earth system has multiple earth electrodes, you can save a lot of time and effort by using the stakeless method. With this, there is no requirement to disconnect the protective earth or use temporary earth spikes. You simply place a special twin coil instrument or two individual clamps around the cable or tape of the electrode you’re testing, initiate the test and read off the result. This method used to only be available on dedicated earth test instruments, like the Megger DET14C, but some models in Megger’s MFT multifunction tester range, including the new MFT1741, support stakeless testing. The only extras you need are the two auxiliary test clamps. The stakeless method has some limitations – it can’t be used in systems that only have one earth electrode, for example – but it’s a great time saver for most lightning protection installations.
Technical & training
CIRCUIT-BREAKER STANDARDS - WHAT'S THE DIFFERENCE? NAPIT’s Don Holmes looks at the two different circuit-breaker standards, and provides clarification on the differences between them. wo standards that specify requirements for low-voltage circuit-breakers (cbs) have been causing confusion for some time among designers and installers of electrical installations. They are BS EN 60898-1 and BS EN 60947-2 and questions are often asked about the difference between them. This article will try to clarify the situation.
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BS EN 60898-1 circuit-breakers Circuit-breakers to BS-EN 60898-1 are used for household and similar installations and are also commonly found in retail premises, schools and offices. They are intended for use in pollution and humidity-free environments where their operation is by uninstructed persons. They have current ratings from 6 A to 125 A, a maximum rated short- circuit capacity (Icn) of 25 kA and an impulse withstand voltage
(Uimp) of 4 kV. They are available with type B, C and D tripping characteristics. Circuit-breakers to BS EN 60898-1 are safe and easy to use, even after many years without maintenance. They are suitable for Pollution Level 2 and their classifications and applications are shown in Table 1. BS EN 60947-2 circuit-breakers Circuit-breakers to BS-EN 60947-2 are frequently used for industrial applications in utilities and manufacturing industries. They are used to protect power distribution circuits up to 1,000 V AC and 1,500 V DC with current ratings of 0.5 A to 6,300 A. They use 'miniature' circuit-breakers (cbs), moulded case circuit -breakers (MCCBs) and air circuitbreakers (ACBs). Circuit-breakers to BS EN 60947-2 are intended for operation by skilled users and they must be maintained. They are suitable for Pollution Level 3, which includes unheated rooms, boiler rooms, industrial and farming areas. Essential operational reliability Two requirements that ensure reliability of circuit- breakers are the ultimate breaking capacity (ICU) and service breaking capacity (ICS). ICU is the maximum short-circuit current that the circuit- breaker can break without damage, which might be 6,000 A or 10,000 A and in the case of MCCBs, 200,000 A for specific voltage ratings. ICS is expressed as a percentage ratio of ICU and gives the maximum short-circuit current a cb can break three times and still function in normal service.
28 July/August 2019 PROFESSIONAL ELECTRICIAN
Circuit-breakers are primary circuit protective devices. They are not intended for frequent switching of loads. Infrequent switching of cbs on load is admissible for the purposes of isolation or emergency switching. Where a more frequent switching is required, such as the switching on and off of banks of luminaires, the manufacturer’s instruction should be followed and preferably an alternative device should be selected. Complying with both standards Circuit-breakers to BS EN 60898-1 can also comply with BS EN 60947-2 but the short-circuit breaking capacity of each may be different. Some manufacturers state that their cbs with a short-circuit capacity of say, 10 kA comply with BS EN 60898-1 and the same cb with a short-circuit capacity of 15 kA complies with BS EN 60947-2. It is convenient when the performance of a cb meets the requirements of both standards and is therefore suitable for residential, industrial and commercial installations. Can BS EN 60898-1 be used instead of BS EN 60947-2? Circuit-breakers to BS EN 60898-1 may look identical to those complying with BS EN 60947-2 but they are not necessarily inter-changeable. For example, the BS EN 60898-1 standard describes B, C and D operating curves with ratio to rated current. But the BS EN 60947-2 standard prescribes an instantaneous tripping release which may be provided with a plus or minus 20% tolerance and adjustable as illustrated in Fig. 1. For this
Although cbs from different manufacturers may appear similar, the technical performance, dimensions and terminations are not always compatible. Assemblies such as distribution boards are validated with specific circuit-breakers installed and these cbs are usually from the same manufacturer as the distribution board. Where cbs made by a different manufacturer are to be installed, verification will have to be undertaken by the manufacturer of the distribution board to BS EN 61439-2 or BS EN 61439-3. Fitting unverified devices will invalidate any verification and the warranty. Regulation 510.3 of BS 7671 requires that every item of equipment selected and installed must take account of the manufacturer’s instructions. Any installer who plans to substitute a different cb must obtain authority from the assembly manufacturer to do so in compliance with Regulation 536.4.203. Otherwise, responsibility for the testing and integrity of the compatibility between devices would be down to the contractor. When this is not carried out, there is a probability that, in the event of an accident, fire or other damage, the installer would be accountable under Health and Safety Legislation.
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reason, manufacturers provide additional curves K, Z and MA to the B, C and D curves. A cb designed for Pollution Level 2 conditions would not be suitable for harsh outdoor or humid applications that require Pollution Level 3. Maximum earth fault loop impedance (ZS) values are tabulated in BS 7671 for cbs to BS EN 60898-1 but the maximum
ZS values for cbs to BS EN 60947-2 need to be obtained from the manufacturer. Replacing circuit-breakers Manufacturers warn against installing circuit- breakers of one manufacturer as replacements for cbs of another manufacturer, without the necessary verification of performance.
Table . Brief comparison of BS EN 60898-1 and BS EN 60947-2 standards Characteristics of cb Current ratings, In Short-circuit breaking capacity, Icn Impulse withstand voltage, Uimp Tripping characteristics Pollution Level Typical uses
BS EN 60898-1
BS EN 60947-2
6 - 125 A
0.5 - 6,300 A
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6 kV or 8 kV
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Conclusion It is important to select the correct type and current rating of circuit- breaker for the environment, circuit and equipment if adequate protection for overcurrent, short-circuit, fault currents and unwanted tripping is to be provided. Manufacturers’ data should be referenced when designing circuits and they should be contacted where additional information or clarification is needed, especially in the case of MCCBs and ACBs.
As a NAPIT Registered Installer, you can access a wealth of technical information, guidance and advice. If you would like more information on joining a NAPIT scheme, visit: www.napit.org.uk, call 0345 543 0330 or go to: www.rdr.link/eg004
PROFESSIONAL ELECTRICIAN July/August 2019 29
TECHNICAL & TRAINING
HAMILTON TRAINING IS ‘SMART’ CHOICE Hamilton’s CEDIA approval and the launch of a new course that helps contractors to safely work on mechanical systems headline our training round-up this month. amilton Litestat has been approved by international home technology trade association CEDIA to become a CEDIA Continuing Education Unit (CEU) Provider. Hamilton’s training course ‘Essentials in Smart Lighting Control and Audio Systems’, which is run at its facilities in Mere, is now a CEDIA-endorsed training programme, contributing 4 x CEUs towards this training requirement. CEDIA-certified professionals are required to obtain at least 30 CEUs within three years. “As the authority on custom-installed home technology, we’re thrilled to have
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received approval from CEDIA for our ‘Essentials in Smart Lighting Control and Audio Systems’ training course,” said Gavin Williams, Hamilton Litestat’s Head of Marketing. “This accreditation recognises the investment Hamilton has made in its training courses and educational efforts, particularly around smart controls, as well as ensuring our product range is suited for simple through to complex smart control requirements.” Hamilton became a member of CEDIA earlier this year. The trade association brings together over 3,700 companies and 30,000 industry professionals around the globe that design,
manufacture and install technology for the home. For more information about Hamilton’s ‘Essentials in Smart Lighting Control and Audio Systems’ training course, go to: www.rdr.link/eg005
YOU'LL LIKE IT A ‘LOTO’
A NEW FOCUS
Teesside-based electrical power training specialist, The Faraday Centre, has launched “MECH1”, a new Mechanical LOTO course which has been established to meet the essential requirements of safe working procedures on mechanical systems, assist employers and employees to reduce the risk of personal injury and to help prevent damage to assets due to operator error. Whenever companies conduct construction, maintenance, demolition, remediation and other similar work which is typical in industry, there is the potential for harm to people, the environment and for damage to equipment. The course provides competency-based training for the isolation of energy systems ready to issue a permit to work. Energy Isolation is a key component of the system of work that allows tasks to be completed safely and without unplanned loss of containment with the potential to cause environmental damage or to damage personnel, plant or equipment. Faraday places great emphasis on the importance of both theoretical and practical learning, so this course encapsulates both to ensure that delegates have experience and insight that they can utilise within their own working environment, in a safe and professional manner. The course is held at The Faraday Centre’s purpose-built facilities on the Wilton site.
The Focus Training Group, which incorporates DCET Training, has announced that it will be relocating to a purpose-built training centre in Plymouth. The group specialises in five different sectors, including electrical, with courses delivered at purpose-built centres in Redruth, Plymouth, Newton Abbot, Exeter and Bristol. DCET Training has been an integral part of The Focus Training Group for eight years and was originally set-up by members of the electrical industry. As such its heritage ensures it has excellent industry links, ensuring delivery of the best possible training experience and support. Mark Down, Focus Training Group's Operations Director, said: “We look forward to the opening of our new centre as we focus on the future and expanding our provision in line with customer and market requirements. “We’re a progressive business that is very much customer focused and led in terms of delivery, which has meant our Plymouth centre has been developed around our customers and learners to ensure we deliver the best experience and training possible.”
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TECHNICAL & TRAINING
enlitened After five years of outstanding success, Enlite Lighting, the LED lighting brand established by the Aurora Lighting Group, will be rebranded Aurora Lighting from September 2019.
Andrew Johnson, Founder & CEO of the Aurora Lighting Group, explains how 20 years of growth and success has led to this development.
QUICK QUERY: LOW LEVEL DIMMING
IS CHANGING TO
A common question that contractors ask when it comes to LED dimming controls is: ‘why is dimming at low levels causing me more issues than large loads?’ Cue Zano’s technical support team for the answer. here’s a lot of focus on dimming large loads on one circuit, and how to successfully add a large number of lamps to one control point; it’s one reason our ZBARLED1000 has proved so popular, as it’s the 1000 W/VA, flicker-free and silent answer to LED dimming. Yet at times, low level dimming is just as much of a frustration for contractors. LEDs – inrush current aside – operate at a much lower wattage than traditional incandescent lamps. A single average warm white LED may be around 5W/VA, which is fine for your average 10-300W/VA dimmer, if you have a few of those lamps on a circuit. Try to install dimming controls on a circuit with a combined wattage of less than that, however, and you start to encounter problems.
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The Aurora Lighting Group is an international LED lighting and technology organisation, renowned globally for its quality, reliability and service, servicing the residential, commercial, industrial, retail and hospitality sectors. Combined with award winning marketing and distribution, the Group serves customers through a global network in more than 70 countries. Five years ago Enlite was launched by The Aurora Lighting Group in response to market changes. Big Performance, High Quality and Great Value is what Enlite stands for, and these qualities have led to sales far exceeding expectations, with the range quickly becoming the number one choice for contractors and specifiers alike. From its market leading fire rated downlights to the popular Ariah™Pro highbays, Enlite products are now installed in thousands of homes and businesses around the world. During this period, Aurora continued to push boundaries and innovate, becoming a globally recognised leader in smart connected lighting that provides exceptional Value Beyond Illumination™.
Take an en-suite bathroom, a small bedroom or even a reading nook. Say you have space for just two downlights, and each lamp is 4.5W/VA each. A minimum 10W/VA controller won’t support that low level, and it will inevitably cause flicker and LED drop out. That’s where the low minimum level preset of our 0-150W/VA Everyday Range solves the problem. Supporting low wattage lamps, these dimmers are perfect for low-loads, such as those in small kitchens, hallways and closets. When it comes to small space circuits, or secondary circuits that require just a few lamps on one dimmer, the 0-150W/VA Everyday Range is a versatile, compatible and reliable solution to LED dimming.
To continue on the back of both Enlite and Aurora’s success, and to assist our customers with the sale and promotion of these products in the UK and internationally, our extensive trade range and the AOne™ smart platform will be driven through one brand: Aurora Lighting. Bringing all our lighting products together enables greater focus, meaning there’s one brand, one catalogue, one website, making our entire product portfolio easily accessible. Therefore, from 1 September 2019, all our Enlite products will be rebranded under Aurora. The product and part numbers will remain the same, just the brand will change. In addition, look out for new exciting products to be launched in September.
For more information, please contact us on 01727 83 66 11 or info@auroralighting.com
To visit Zano Controls’ easy, interactive product finder, go to: www.rdr.link/eg006
auroralighting.com/gb/news
Technical & training
PROFESSIONAL ELECTRICIAN July/August 2019 35
Technical & training
36 July/August 2019 PROFESSIONAL ELECTRICIAN
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OF QUALITY As MK Electric celebrates 100 years of producing top quality products, Stuart Bailey, Test Lab Manager, shares his five favourite facts about the facility which ensures MK Electric maintains the highest product standards. 1. It’s UKAS accredited Our laboratory was recently recertified by United Kingdom Accreditation Service (UKAS), the UK’s national accreditation body for determining the technical competence of testing and certification services. UKAS accreditation covers approximately 50 electro-technical standards for a wide variety of electrical wiring products, demonstrating the wide-ranging capability of MK Electric’s testing facilities. 2. Testing takes time Our testing cycles can vary from 24 hours to six weeks. We hold our products to rigorous tests designed to meet, and often exceed, required standards. For example, British Standards dictate that switches must be tested up to 40,000 operations, and sockets tested to 15,000 insertions and withdrawals. But, as part of our commitment to quality and reliability, our testing can exceed such standards by 50 or even 100%. When you imagine that this could mean testing a switch to 80,000 operations, the depth of our
mkelectric.co.uk
testing procedure becomes clear, and it’s easy to see why seemingly simple tests can take weeks to complete. 3. It’s bigger than you might think MK Electric’s large-scale testing laboratory includes a custom-built endurance testing bay which is more than 50 feet long with 15 computerised testing bays, each able to run 24/7, and capable of testing up to three products at a time. This allows us to test multiple products and prototypes simultaneously for optimum efficiency. 4. We still undertake manual testing Our laboratory experts are trained to meticulously inspect products according to the relevant criteria, meaning that human skill and computerised precision are able to work together in the laboratory to provide the most reliable possible results. 5. Our tests cover every aspect of the product It goes without saying that the primary purpose of the MK Electric
test lab is to ensure our products meet all of the required safety standards. Alongside testing for safety, and of course, reliability, we also look at the less obvious elements of quality control. For example, one of our test rigs actually rubs household cleaning fluid on the facia of decorative products. This is to ensure that the finish of the product is durable enough to cope with the rigours of everyday cleaning and will stand the test of time. Since its grand opening in 1982 by His Royal Highness the Duke of Kent, the MK Electric test laboratory, and its dedicated staff, have been maintaining the high standards for which the company is known. MK Electric prides itself on its safety, reliability and quality, and we in the test facility are proud to uphold those values.
For more information, visit: www.mkelectric.co.uk
S Y A W ] A E V I G [
GIVEAWAYS
2
to win
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ZIRCON IDEAL INDUSTRIES EMEA In-Sure Box The IDEAL In-Sure Box is designed for use with In-Sure Push-in, In-Sure Lever and SpliceLine wire connectors, making it maintenance-free and suitable for installation of an electrical junction in an inaccessible location, such as behind plasterboard or under a floor. It complies with the BS 5733 maintenance-free accessory standard and BS 7671 wiring regulations. Uniquely, the new In-Sure Box has four cable entry points, allowing up to two cables each, so it can be used either as a cable entry from one end or an ‘in-line’ configuration for applications such as cable splices or lighting spurs. By combining Push-In, Lever or SpliceLine wire connectors with the patented In-Sure cable grip system, no additional tools are needed to secure the cable. This makes installation fast, easy and fuss-free, even when working in awkward environments, such as up a ladder or in a confined space. Designed to accept most common flat and round cables with an overall diameter of 3mm to 8mm, it can accept up to six individual connectors. The enclosure fits through a 50mm hole for spotlights and similar installations and supports cables from 0.5mm2 to 2.5mm2. We have 2 x boxes of 10 to give away this month. To enter the draw, go to: www.rdr.link/eg007
HULTAFORS TOOLS
MultiScanner L550c The MultiScanner L550c OneStep vibrantly locates studs, metal, and live AC electrical wiring behind walls, floors, and ceilings. The advanced ColorTrip display lights green in stud scan, blue in metal, and red in live AC scan. The screen flashes, or lights red, to alert the presence of live AC in Stud, Deep, and Metal Scan modes, while a 4-mode switch makes it easy to change modes. Stud Scan mode locates the centre, edges, and direction of wood or metal studs up to 19mm deep; Deep Scan mode doubles the scanning depth to 38mm deep; Metal Scan mode locates non-ferrous metal, such as copper pipe, up to 38mm deep, and ferrous metal, such as rebar, up to 76mm deep; and AC Scan mode locates live, unshielded AC electrical wiring up to 51mm deep. The ultra-bright display screen, patented SpotLite Pointer, and audio tone all indicate the location of the target. WireWarning Detection indicates the presence of live, unshielded AC electrical wiring up to 51mm deep. We have 2 x MultiScanner tools to be won this month. To enter the draw, go to: www.rdr.link/eg008
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Hammer Set Whatever type of hammering jobs you have to do, the Hultafors Tools range of Hammers delivers all the power and precision you’ll need. This set of three hammers from Hultafors includes a Bricklayers Hammer, a to win Carpenters’ Hammer and a T-Block Hammer. They’re tools that can handle the toughest work, delivering the best possible levels of precision, performance and safety. They’re all ergonomically designed for ease of use and come with a special grip technology – perfectly crafted for your needs. There are 3 x hammer sets up for grabs this month. To enter the draw, go to: www.rdr.link/eg009 40 July/August 2019 PROFESSIONAL ELECTRICIAN
EV SPECIAL
ELECTRIC AVENUES With demand for electric vehicles (EV) growing in the UK, the NICEIC & ELECSA looks at the training on offer to help contractors to prosper from this golden opportunity. here are now approximately 206,000 electric vehicles on the road in the UK (as of April 2019, source: nextgreencar.com) – up from just 3,500 in 2013. That’s a huge increase in just six years and the number is expected to rise further following the announcement of government plans to end the sale of petrol and diesel cars by 2040. Because of this, the demand for EV charging points is also increasing, creating new opportunities for electrical contractors looking to diversify their business.
In addition to the technical content, delegates learn about the Electric Vehicle Homecharge Scheme (EVHS) – which provides grant funding of up to 75% towards the cost of installing electric vehicle charge points at domestic properties across the UK. There is also information about the Workplace Charging Scheme (WCS) – a voucher-based scheme that provides support towards the up-front costs of the purchase and installation of EV charge-points, for eligible businesses, charities and public sector organisations.
Training gains NICEIC has witnessed a big rise in demand for places on its EV Charging training course in recent months, More than 1,000 contractors have now undertaken the one-day course and around 4% of all our registered businesses say they carry out work in this growing area. The course teaches attendees how to install EV charging points in compliance with BS 7671, the Electrical Safety Quality and Continuity Regulations and the new IET Code of Practice. It also looks out how the electrical supply can be delivered from both private and public supplies.
Registered installers In order for applicants to receive this funding the charging points must be installed by registered installers who are listed on the government’s Office of Low Emission Vehicles (OLEV) list. To get on that list firms must be able to provide proof of registration with an official registration body, such as NICEIC, ELECSA or ECA, and that those individuals carrying out the work have received the appropriate training. Asad Majid, Head of Training at NICEIC and ELECSA, explains: “The majority of people that come through our training centres are those that are looking to
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diversify their business and get on the OVLEC list of approved installers. “More councils are now looking to install car charging points because of the grants available, but in order to do so they can only employ registered contractors who’ve had the appropriate training.” To check dates, availability and booking details for the NICEIC EV Charging course go to: www.rdr.link/eg010
CASE IN POINT – BMM ENERGY SOLUTIONS Airdrie-based BMM Energy Solutions is one firm benefiting from the increase in demand for electrical charging points. It has experienced a relative boom in the last two years, helping to capitulate the business into a period of rapid growth. After initially picking up a contract with Edinburgh Council, BMM Energy is now working with Transport Scotland, the NHS and Scotrail to provide charging stations across Scotland. The company has now put in place some strategic appointments to help it win more high-value contracts with plans to open up an office south of the border – where it has also had some successful contract and tender wins.
PROFESSIONAL ELECTRICIAN July/August 2019 43
EV SPECIAL
PASSING THE EV TEST Jeff Jones of The Technical Department reviews the Metrel MI3152 Eurotest XC multifunction tester and A1532 EVSE adaptor. ue to the fact that my (then) MFT was around 10 years old, I was happy to take up the chance to trial the latest Metrel MI3152 Eurotest XC MFT, which I’d been hearing great things about. Furthermore, having recently qualified on my EV course with a couple of EV installs lined up, I was keen to give the A1532 EVSE adaptor a run-out at the same time. The experience of using the MI3152 Eurotest XC MFT is the same as comparing a 10-year-old mobile phone with the latest smart phone technology today – the differences are huge and there is no fair comparison really. That said, I’ve been pretty blown away by how good this tester actually is. Metrel clearly has a good pedigree in manufacturing test instruments, and an awful lot of research and development has certainly gone into this product. The first thing that stands out when you get to grips with the tester is the touch
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screen. I’m surprised more manufacturers haven’t jumped onboard with the touch screen concept, as it works really well when selecting various test functions, and quickly became my preferred method of input. There is, of course, also the option to use the normal buttons if touch screen still isn’t your thing. The tester is easily linked to the aMESM mobile App and the Metrel ES Manager PC software, which all worked seamlessly. The Bluetooth connection works well, as does the hard-wired PC connection. In the past I’ve used other manufacturers’ sync software and quite frankly it has never delivered, resulting in me manually inputting the data because it is quicker to do so. This defeats the object in the first place. This Metrel software is different in that it is extremely customisable, which at first can be a bit daunting. It uses database terminology, which I was not initially familiar with, however once you read the manual it all very quickly becomes second nature.
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Because you can adapt the testing process to your exact needs, this sets it apart from any other software that I've used before. My preferred method was to work from my laptop, setting up the software to record the tests how I’d like them, then download it to the tester. Alternatively, you can do the same from the mobile App or even do it in the tester itself. It also allows you to download test data straight into and create an 18th Edition certificate, alleviating the need for any third-party software. A real time saver! At our company, the Technical Department, we work to two electrical standards (BS7671 and BS7909 Temporary Power Systems) and we also perform routine testing on temporary distro. The testing process for all three is quite different. This software and App allowed me to customise my testing process for all the different testing applications, which I found incredibly impressive. The tester package I received also included the A1532 EVSE adaptor. After a
couple of EV installations you realise that some EV sockets that you fit only become live when it detects that a car is attached. This can be problematic when performing dead and live tests on the socket end of line. What this EVSE adaptor does is trick the socket into thinking the car is attached so that you can perform all the dead and live tests. It’s a must-have item if you’re going to be installing Type 2 EV socket outlets. Another really impressive item in my test package were two current clamps – the A1018 low range leakage clamp and A1019 standard current clamp. These clamps allow you to measure current directly into the MI3152 Eurotest XC MFT itself in low range and standard range, but when the two clamps are paired up you can also measure the resistance of an earth conductor. For instance, when connected to an earth rod or plate and performing a Ze test. A really great feature! Recently I was working on installing a permanent supply with a TT earthing arrangement. We had to accurately measure the impedance to the earth electrodes. By placing both the A1018 and A1019 current clamps together on the earth conductor leading to the electrode you can accurately measure the impedance. I can see this feature being very useful when installing a new EV socket and having to add an earth rod to a PME earthing system. The Technical Department also performs a lot of work with temporary generators, so using the combined clamps will be useful when installing a suitable earth rod. Because both current clamps connect directly to the tester, I no longer need my separate current clamp meter, which means less gear to carry.
You can also use the current clamp and standard probes to perform power quality analysis on the network, such as harmonic distortion, which is a useful function nowadays if you're experiencing problems on the network and have ruled everything else out.
Another feature that I like about the product is the task light that comes on at the end of the probe – particuarly handy when you're trying to hit that terminal in poor light and making proper contact. I also like that when the test you're performing only needs two probes and one probe is redundant, the redundant probe doubles up and
slots into the back of the probe you’re using. On previous testers it’s been a pain try to hold two probes on the same terminal for certain tests, wishing you had a third hand. The auto RCD test function is also great, automatically
measuring both sides of the trip curve plus and minus. When we’re testing multiple RCDs on big distro panels this is a huge time saver, but when you add the fact it logs and records the measurements directly into your phone App, tablet or laptop it is quite simply brilliant! The tester and EVSE adaptor come in a nice padded bag with lots of room for all the necessary probes. There is even a strategically placed zip so you can plug in the probes and use the tester without it having to leave the carry case. This adds a nice bit of extra extra protection when out in the field. Also, with an add on lux meter you can measure and record directly into the tester which is handy when measuring lux levels in an emergency lighting system. The only thing that let the tester down a little bit is its battery life, but with the lovely bright clear touch screen and the Bluetooth connection you can get a good day’s testing done – just remember to charge up before the next day. The batteries are rechargeable in the tester, so much like your mobile phone, if you recharge it each evening it will be ready to go the next day. I can’t recommend the MI3152 Eurotest XC MFT and A1532 EVSE adaptor highly enough. This combined package is a must-have for anyone considering moving into installing EV charging points. Plus, all the other amazing features that Metrel has added to the tester means that the MI3152 is the only test instrument I need to carry when I'm out testing. To view a technical brochure, containing more product specification details on the A1532 and MI3152 from Metrel, go to: www.rdr.link/eg011
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EV SPECIAL
EV CHARGING: HOW DOES IT WORK? Oliver Johnson, ABB’s Business Development Manager for EV charging, answers some questions about the key technical items that electricians need to know. asically there are two types of EV charging technology: AC (alternating current) and DC (direct current). The batteries themselves need DC power to charge them and because the grid supplies AC power, it has to be converted from AC to DC somehow. AC chargers rely on a battery charge inside the car body to convert AC to DC. They're the most common type of EV charger in the UK today, particularly for domestic properties as they often don’t require an upgrade to the incoming supply. However, there’s limited space available inside car bodies, meaning that on-board chargers are typically limited to a maximum of 6-7 kW. In practice, if you’re connecting to a single phase domestic 230V supply via a
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13A socket, you’ll only be able to draw 3 kW. So if you’ve got a car with an 80kWh battery, such as a Jaguar I-PACE, Audi e-tron or a Tesla, it will take more than two days to fully charge the battery. Three-phase AC chargers are also available, providing up to 22 kW to speed up charging times for some vehicles like the Renault Zoe that have on-board chargers to accept this.
power rating, the most powerful can charge a vehicle in under 20 minutes. They rely on powerful AC-DC converters that are too large to install inside cars, so must be housed in units at the side of the road. Once a car is plugged in, an electronic ‘handshake’ takes place to confirm that charging can take place safely. The car’s own battery management system then controls how much power the battery
Faster charging Many drivers will be looking for much faster charging times – and that’s why we think there is going to be more demand for fast-charging stations based on DC technology, often at commercial sites like supermarkets, petrol stations and offices. DC chargers can provide fast charging from 20-350 kW and, depending on the
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EV SPECIAL
WHY ARE ISOLATION TRANSFORMERS IMPORTANT?
canfiaccept safely and therefore the speed of charging. This is called 'profiling' and is based on data from sensors and built-in electronics – as a result, it’s not possible to overcharge a car battery with a powerful rapid charger. There are also different standards to be aware of for DC fast chargers. CCS and CHAdeMO are the most common and have a different interface in terms of the connector hardware and the electronic handshake – but today’s chargers are often compatible with both. How is EV charging covered under the wiring regulations? Three important changes were introduced under the 18th Edition: 1. Contractors must use a socket that is designed specifically for EV charging. These have uprated contacts and switches, can supply a constant 10-13A over many hours and are clearly marked with EV. In comparison, standard sockets aren't safe for EV
charging as they're not designed to carry constant power at full capacity and can be damaged. 2. There are also new rules around earthing that need to be followed. Outdoor EV chargers can't be connected to most types of building earth, unless certain conditions are met. An earth spike can often be used to earth an EV charger – but these aren't always practical, especially for installations in buildings that have a steel structure. 3. The third update is that contractors will need to ensure that a Type B RCD is integrated into the charger or into the fuse board for protection against electrical shock. Type B RCDs are suited to circuits that supply power for DC, power electronics or other specialist loads. It is worth using a charger with in-built Type B protection to save the expense of upgrading the fuse board and to keep the job simple. These regulations only apply to AC charging points or for the AC parts of a DC charger. DC systems have an alternative set of standards. For more information about the range of EV charging technology from ABB, go to: www.rdr.link/eg012
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As a specialist in isolation transformers for EV charging installers, Electro-Wind is offering advice to electricians regarding the requirements of the 18th Edition, according to Section 722, which covers the particular requirements when installing points for EV charging. When considering the general requirements for conductor arrangement and system earthing, it may be necessary to install a three-phase isolation transformer providing a protective measure through electrical separation. Historically, domestic EV charging points relied on the system earthing supplied by the main electricity supply to the building. The new legislation requires a PME earthing facility not be used for the protective conductor, unless certain methods are employed. Electro-Wind offers a cost-effective solution to these isolation transformer needs, whether it’s a new, single or three-phase supply or an upgrade to a previous EV point installation. The isolating transformers for domestic installations are supplied in a suitable enclosure that can be fitted to an internal wall of a garage or externally, if required to supply an EV charge point. The transformers are built to comply with BSEN61558-2-4 and have been installed to supply power to EV chargers at Volvo, Audi and Porsche UK sales centres. For more details about how Electro-Wind's engineers can help you find the right solution for your EV charging needs, go to: www.electro-wind.co.uk
ADVERTISING FEATURE
Contrary to the opinion of some, the origins of the MFT for testing the safety of fixed wired installations can be traced back to a sixty-year-old Slovenian company which thrives on innovation.
ORIGIN OF THE SPECIES –
ALL-IN-ONE TESTERS n the days when other brands ruled the roost, an Italian company commissioned Metrel to combine all three testers into a single box. Metrel duly completed the job and the first multi-function tester was born. Interestingly, the Italian company went on to supply the early combined testers, before their British customer decided to enter the market properly and build their own.
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New displays, a major step Metrel has continued to innovate, introducing monochrome dot matrix screens to replace the cost-effective but inflexible customised LCD screens that
are still common on many existing testers in this class. This simple change in the physical design of the product allowed the developers of the instrument firmware to introduce new tests when the regulations required it and for the customer themselves to update the tester programming. These new screens allowed the introduction of help screens to the instruments, making it easier for the installer who infrequently tests to remember the connections he needs to make. Another example of the sort of change possible can be seen when there was original talk about measuring voltage drop and power quality with the 3rd amendment of the 17th Edition. These were eventually relegated to the appendix, but rather than say “no we can’t do that” as many did, Metrel simply changed the firmware so that these tests and their help screens are available to customers should they be needed. In fact these tests are pre-loaded for purchasers of new testers today.
to be imparted in a single screen, and for the help screens to be clearer and easy to follow. The introduction of auto sequences, a logical extension to the whole installation of auto RCD testing, has brought the prospect auto testing of installations that bit closer. The release of the 3-phase active switch accessory has made it possible to make and break connects remotely, making the process safer and introducing new business opportunities to Metrel customers. The most promising business opportunity for electrical contractors for years is the installation, testing and monitoring of the millions of EV charging points over the next decade. Like many multi-testers, Metrel already had the earth electrode test, but Metrel is currently alone in being able to test these chargers to the 18th Edition. The inclusion of a 6mA DC breaker test makes the Metrel testers unique, as does the EVSE adapter that mimics a vehicle in all states of charge. The auto sequence test and simple-to-use stored data management will make testing these installations in large numbers a real prospect for future business.
And a step further Going one step further, Metrel has introduced the full-colour, dot matrix touch-screens to the latest ranges of multi-function testers. This allows huge amounts of test parameters and results
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PRODUCTS & BUSINESS SOLUTIONS
ProofVision's William Uttley takes a look at the audiovisual elements required to transform outdoor spaces into fully integrated entertainment hotspots this summer.
THAT’S ENTERTAINMENT he already buoyant home automation market is expected to grow rapidly over the next five years, driven by the development of control systems which enable technology and devices to work seamlessly together, facilitating complete comfort and control. It’s expected that £10.8 billion will be spent on smart home devices in 2019, with AV and entertainment devices leading the way. However, it’s not just in the home that we're enjoying this increasing network of integration. A new generation of AV devices specifically designed to thrive in outdoor environments is inspiring homeowners and businesses to create alfresco entertainment areas. Last year, we saw a 40% increase in sales of our outdoor TVs when compared to the previous 12 months, further proof of this growing market. With technology in this area advancing so quickly, electrical and AV installers might find themselves increasing involved in this type of project.
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Exposed to the elements Outdoor AV installations present a unique set of challenges. Bright sunshine, temperature changes, rain and noise from traffic and wind – the great outdoors is an uncontrollable environment and with the absence of walls and ceilings to contain the sound, its essential that the products used are designed specifically to perform in these extreme conditions. Innovative AV appliances these days combine cutting-edge technical specification with a weather resistant shell
to provide all-weather listening, viewing and gaming. Other key essentials when selecting outdoor AV equipment include: 1. Ultra-high brightness screen The sun can be one of biggest disruptions to a smooth viewing experience, so a bright screen with anti-reflective technology is key. A brightness of at least 700cd/m2 will ensure that the screen is clearly visible on a sunny day. Our Aire outdoor screens offer up to 3,000cd/m2, giving a sharp picture even in direct sunlight, with 4K Ultra HD available on some models. 2. Superior sound Waterproof Bluetooth speaker systems are available in a variety of designs, from standard wall mounted speakers to rock effect units that blend into the overall garden design. Connect up to the outdoor TV for an immersive surround sound experience.
safely hidden amongst undergrowth to blend into the overall garden design. 4. Connectivity With the home automation sector growing so quickly, its essential that outdoor TVs are compatible with the control systems that are paving the way. Quality AV products should come with IR and RS232 over IP control as standard, meaning they can work with leading home automation systems such as Control4 and Crestron as well as making them easer to test and install. 5. Extra durability TVs for commercial installations that are more prone to damage and vandalism should feature tempered glass screen and robust structures that provide that extra level of protection. For more details about ProofVision's range of outdoor audio-visual equipment, go to: www.rdr.link/eg013
3. Water resistant All electrical appliances installed outside must have an IP rating, which indicates the degree of protection from solid particles and moisture. A rating of IP66 will ensure the product is protected against powerful water jets, while products rated IP65 are protected against water projected from a nozzle. These ratings also ensure products are dust tight, so additional speakers could be
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GARDEN LIGHTING - REBORN he lighting of outdoor spaces has been transformed in recent years thanks to the key benefits brought about by LED over traditional lighting. The relative robustness of solid state lamps compared to their filament predecessors, coupled with their lower running costs, has created a renewed interest in the lighting of gardens. Lighting manufacturers are producing new generations of LED luminaires for the outdoors to tackle the natural challenges of external lighting. The widening array of new luminaires available at trade counters requires some know-how to navigate through the options when specifying outdoor lighting. To help you to better understand your lighting options, here's a brief overview of how fixtures are deployed, with examples from the new and comprehensive Integral LED range:
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Setting the scene Picture a garden as a theatrical stage. Imagine a scene framed with natural backdrops and scenery, while the actors or focal points are played by the trees, shrubs and ornaments. After dark, the lighting scheme tells the story. For instance, a wall with a rough stone texture or brickwork can be used to frame the view of an outdoor space and help balance the composition of the scene. Here ‘grazing’ or the washing of light across the face of an object is an effective technique that can be created with the use of a series of inground uplighters. Integral LED’s range of Pathlux Inground Uplighters offers a selection of lumen levels and a choice of beam angles
Here the team at Integral LED shares some top tips to help your customers ‘set the scene’ with their outdoor lighting.
of warm 3000K illumination, which is ideal to pick out the detail in a vertical surface. Locating a line of concealed inground luminaires at the base of a wall, hedge or fence, close enough to spread an interlocking wash of light, adds an important structural element to a garden at night. Focal points Once the stage is set, it’s time to introduce the main players, features to draw the eye
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of the viewer and involve them in the narrative of the outdoor space. Trees are magnificent in all seasons and benefit from
uplighting into the branches or canopies for a very theatrical effect. Lighting from the front produces a flattening appearance. Consider the placement of additional luminaires from the sides to enhance the 3D appearance and backlight for increased drama. Integral’s 10.2W inground unit produces 800 Lm – sufficient to illuminate a tall tree. Moonlighting or fixing downlights within the branches has the reverse outcome, mimicking the rays of a full moon and creating a romantic scene. Fixing LED PAR 38 lamps on easy-fix brackets and attaching directly onto the tree is a straight-forward solution. Consider using different colours too. Sculptures and ornaments add unique character to a garden. Again, one lightsource will not accentuate the detail of a piece – using three PAR lamps on inground spike fittings highlights the relief of an object and when backlit, the object is separated from the background. Pathways Pathways through an outdoor space have an important function of providing safe passage. Yet they do fulfil a creative purpose of dividing a garden, often into
contrasting areas of planting and also activities like dining or lounging. Whether you're using bollard or low ground lighting, glare especially is a factor. Integral’s bollard range casts a downward light in a 120˚ cone. The LEDs are fixed to the underneath of the luminaire’s cap so the light is shaded from eyesight. Locate these self-standing fixtures on both sides of the path and resist equal spacing to break up the uniformity. Another option is to keep lighting at a low level where illumination can direct footfall while not detracting from the visual theatre of the main garden scene. If there is a retaining wall, brick lights and wall downlighters can be used – especially over hazards like steps. Here an inground luminaire can play its part, casting light horizontally across the path surface. Integral’s Pathlux range offers four-way, two-way and single direction lamps designed as a concealed fixture. Going underground Despite the use of IP67 luminaires, the vulnerability of electrical installations to the inevitable exposure to moisture and water below ground level can dramatically shorten the life expectancy of an installation.
The team at Integral has been developing features to prevent the causes of ‘cable suction’, which effectively draws water into the core of the lighting installation. As an LED increases in temperature during operation, heated air expands. Prevented access to the sealed luminaire, the air escapes along the connected cable. When the light is switched off and begins to cool down, the assembly effectively becomes a small water pump that draws moisture in the air along the cable into the fitting body. H20 Stop is a device designed to eliminate this capillary action within a scheme’s electrical cabling and hence it minimises the presence of corrosive moisture within an outdoor lighting system. Integral’s new Pathlux Inground series carries the H2O Stop feature throughout the range. Coupled with the additional benefits of solid-state light-sources, it will preserve the operational lifetime of illuminated gardens. For more details about Integral LED's outdoor lighting collection, go to: www.rdr.link/eg0
PRODUCTS & BUSINESS SOLUTIONS
BETTER SAFE THAN SORRY Mark Flanagan, Technical Manager for Scolmore Group, talks to PE about fire-rated downlights and the importance of ensuring products are rigorously tested to guarantee reliability and safety. n light of the Grenfell tragedy, the spotlight has been firmly focused on fire safety. This has resulted in much more stringent building regulations, whilst building products are coming under more scrutiny. As the first manufacturer to launch fire-rated downlights in 2005, Scolmore has had years of experience in developing, modifying and improving our range of products to ensure they meet the latest requirements.
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Why is fire rating required? A standard house in the UK usually has two floors, and where there is living space above, the wooden floor construction with plasterboard ceiling must withstand 30 minutes of fire; firstly, to prevent rapid fire spread which could entrap occupants of the building, and secondly, to reduce the chance of fires becoming large. Where there is no living space above, e.g. loft space, no fire rating is required. However, we would still recommend fire-rated downlights in the event this area should be converted to a living space at a later date. The more floors in a building, the longer the fire protection/compartmentation has to last. In a three-storey building – with the loft
converted to a bedroom – the floor constructions must comply with 60-minute fire rating to give enough time for the occupants to evacuate in the event of a fire.
Downlights and fire rating The floors and ceilings will have passed fire testing as a complete floor, but once an aperture for a downlight is made, the fire barrier is broken. A standard open back downlight allows the fire, vapours and heat to penetrate the floor space and can lead to collapse before the required times of 30, 60 or 90 minutes.
A fire-rated downlight uses a sealed steel body, together with an exterior intumescent strip around the unit. In the case of a fire, these elements separate the room from the ceiling void, preventing the spread of fire. The intumescent material helps stop the fire, heat and vapours from spreading into the void. Downlights and fire testing All our fire tests are carried out by independent testing specialists Building Research Establishment (BRE). It can comprehensively test, predict and assess the fire performance of products and materials to British, European, Marine and International fire-test standards. Its facilities include a state-of-the-art Burn Hall (one of the largest in Europe) capable of staging 10 MW (9m x 9m hood) calorimeter fire tests, and a large custom-built facility for fire resistance tests of floors, walls, beams and columns. The BRE test starts with the construction of the floor whilst following the material manufacturer’s construction guidelines for the fire rating required. The joists, floor board and plasterboard are assembled, with the apertures then cut and the downlights fitted. The downlights have to be spaced at recommended distances to give an account of real-life installations in a worst-case scenario. Once constructed,
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weights are added to the floor to simulate the weight of furniture, etc. It’s then heated by gas burners in a furnace to over 1,000°C. If more than one layer of plasterboard is fitted (e.g. the 90-minute fire test), the first layer can fall without being deemed a failure. The main contribution to an early failure is a hot joint on the floorboards. This is mainly due to vapours and heat build-up within the floor void exceeding 300°C where ignition is only required. The test can stop in the event of earlier failure – whether the required time has elapsed or until the floor construction collapses. At Scolmore, we design our products to withstand the rigorous testing that is necessary to meet the requirements of the BS standards governing their safety, and electricians should be using this information when advising their customers on the right products for the project they have in mind. With a Scolmore fire-rated downlight customers have the assurance that this is a quality product that has undergone all the required testing and is a reliable and safe product to use. Some manufacturers will state that their products have a 90 minute fire rating. However, that doesn’t always mean that they will meet the requirement for 30 or 60 minute ratings. Each rating has its own test, so they should have passed all three tests to ensure the full rating requirement. Scolmore has produced a CPD training module – ‘Downlights and testing for fire rating’, and this is available for delivery on request. To view a promotional video with more information about Scolmore’s range of fire-rated downlights, go to: www.rdr.link/eg014
PRIZE DRAW
WIN A 4K ULTRA HD SMART TV WITH BENDEX! endex offers a range of PVC-U trunking, conduit, cable protection guard, channelling, surface boxes and IP rated sockets. These cost-effective cable management solutions are suitable for a wide variety of projects and include the Challenger three compartment trunking system, mini and maxi trunking, conduit and channelling products.
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Website re-launch As part of Bendex’s service offering, the company has relaunched its website, providing customers with a user-friendly and easy way of locating product information. The new site includes access to online product reference tables, technical data and cable capacity charts. Bendex’s PVC-U cable management products are suitable for a wide range of applications – from education facilities, offices and commercial spaces to domestic installations. With such an extensive portfolio, it is key that customers understand the uses and benefits of each Bendex product in order to make the correct selection that is fit for purpose. Therefore, the new website will provide customers with everything they need to build a complete cable management system suitable for their project. For more details visit: www.bendex-plastics.co.uk
HOW TO ENTER For your chance to win a 43" Toshiba LED HDR 4K Ultra HD Smart TV, courtesy of Bendex, all you have to do is go to: www.rdr.link/eg015 and fill out the contact form. Alternatively you can visit: www.professional-electrician.com/win. One winner will then be drawn at random from all of the entries. Deadline for entries: 31/08/2019. Usual T&Cs apply.
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PRODUCTS & BUSINESS SOLUTIONS
WHAT IS HEAT RECOVERY VENTILATION? I The team at Blauberg tell us more about how heat recovery ventilation works.
n an age of ever increasing efforts to conserve energy and protect the environment, technology has been evolving to meet the challenges we face with seemingly endless innovation. The government is also playing its part by implementing new rules to the energy efficiency ratings of new builds, as well as introducing a six star code system (non-mandatory) to improve the energy efficiency of buildings and using planning to protect the environment.
Breathing space Homes are now as close to airtight as can be realistically expected, incredibly well insulated and have very low carbon emissions, as well as being built from sustainable products. The problem with airtight properties, however, is that they can’t ‘breathe’. Traditionally, homes were built with air bricks, chimneys and window vents and this would ensure that the flow of air would always maintain a healthy atmosphere for the occupants. As soon as this element is removed there’s an increased buildup of CO2 and moisture in the air which in turn can lead to condensation and eventually black mold,
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making for very unhealthy living conditions in your home. Enter Heat Recovery systems – mechanical ventilation systems that not only provide a constant input of fresh air and extraction of stale, moist air but also manage to retain the air temperature in the process. This is achieved by using the heat from the outgoing air to warm the incoming air to a very similar temperature without the two airstreams ever coming into contact with each other. This, in turn, cuts down on fuel bills by preventing the user from paying to heat their garden, whilst at the same time providing a very comfortable atmosphere. At the very heart of every Heat Recovery system is the Heat Exchanger. These usually consist of an interlaced series of plates that stack warm and cold
airways alternately, warming the cold incoming air whilst simultaneously cooling the warm outgoing air and ‘exchanging’ the heat. The air is moved around the ducting
system by two fans: one for the extraction and one for the air supply. The unit runs continuously to provide a constant rate of air change, and the only time that this air flow changes is
when the unit is boosted, either manually or automatically, via a control surface, at times of high occupancy, high humidity or odour. Massive savings The amount of extracted heat that will be returned is gauged by the unit’s efficiency, for example if your unit has an 80% efficiency and your home is heated to 22˚C, the returning air will be 17.6˚C and that will be heated back up to 22˚C by the original heat source. This represents a massive saving both financially and environmentally whilst at the same time providing a very healthy and comfortable living environment. For more information about the range of heat recovery and ventilation solutions from Blauberg go to: www.rdr.link/eg016
Products IN PRACTICE
Warehouse revamp delivers ultimate savings When Prime Light Electrical, a distributor of high quality electrical components to the lighting industry and other related markets for over 25 years, invited Aurora Lighting to upgrade its warehouse lighting its aim was to significantly reduce energy costs as well as improve visual appearance and visibility. The project To ensure that all client objectives were met, a lighting design was undertaken with products selected from Enlite's new Trade Edition 2 catalogue. In the warehouse there is a mezzanine level where high powered lighting had previously been used, so, as maximum energy savings were highly desirable, Enlite specified more suitable lighting with a much reduced energy consumption and then proposed sensors, ensuring the lights were only on when the aisle was in use, increasing energy savings further. The Enlite products used were the BatPacPro linear, which provides over 40% energy savings compared to traditional fluorescents, and AriahPro high bay, which produces 150lm/W that can now replace a traditional 400W industrial fixture. End result The visible difference between the previous and new lighting was vast. The warehouse felt brighter, cleaner and fresh in appearance and Prime Light Electrical was extremely impressed with the outcome. The sensors in the AriahPROHighSense were extremely useful as some areas were not being used very often; the client could see the immediate savings they would achieve. In addition to savings on energy costs, Prime Light Electrical was pleased to learn that the installation of the Enlite BatPacPRO and AriahPRO will also reduce maintenance costs, as the high ceiling of the warehouse previously required a cherry picker for the upkeep. To download a copy of the new Enlite Trade Edition 2 catalogue, go to: www.rdr.link/eg017
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sponsored by www.electricalcharity.org
UNITRUNK COVENTRY UNIVERSITY LIBRARY TANSUN CASHMORES METALS Based in Walsall, Cashmores is a specialist coil processor in stainless steel and aluminium. To ensure workers are comfortable all year round, the company has installed Tansun infrared heaters into its factory work stations. 18 A1A and 18 A1J Apollo infrared heaters were selected for the factory’s very high ceilings and were specified to replace the existing inefficient and costly heating system, and keep the area warm during the winter months. The infrared heaters are controlled via localised switches for individual zones, which provide instant heat and allow workers to control the heating in areas only when/where required, reducing unnecessary energy consumption. Nick Godward, Production Engineer at Cashmores Metals, commented: “We estimate a saving on last year’s energy bills, including initial start-up costs, purchase, installation and running costs, of approximately £90,000 since its installation in November 2018.” www.rdr.link/eg018
Unitrunk is to provide the new data and electrical cabling infrastructure as part of a £2.1 million library upgrade at Coventry University. Unitrunk’s trunking has been used in two sizes to connect all electrical, LV and data services from the existing risers in the newly constructed and refurbished areas. All the trunking is being installed in the ceiling void and power and lighting cables will be installed in one compartment, while the other compartment will be used to contain data, fire alarm and LV cabling. Kevin Rollason of Whittaker Brothers, who are carrying out the installation, said: “Unitrunk’s multi-compartment trunking is a standard specification for us because it’s robust and easy to install. Thanks to Unitrunk’s UK manufacturing and national depot network, we also have the peace of mind that comes with knowing that we can have what we need delivered to site quickly, ensuring our installation schedule remains on track.” www.rdr.link/eg019
PRODUCTS & BUSINESS Solutions
SHORTS STORIES After loading up with the latest selection of workwear from Snickers, Steve Hewish of Turrell Electrical Contractors looks at whether they'll make worthy additions to your summer on-site wardbrobe. Solid Gear Haze Safety Trainer Put simply, these are the comfiest safety trainers I’ve had the pleasure of wearing. They’re so easy to walk in, slip on and off easily thanks to the Boa system, and felt almost invisible when working and driving. These are the perfect safety trainer for those trades that work indoors or in dry working conditions, but are less suited to a damp environment, as I found out when getting wet feet after taking a walk through a puddle on the way to site. I believe there is a boot version in the Haze range that is more weather resistant, so that is probably your better choice when working in such conditions.
2708 Polo Shirt I feel like I’m part of a generation that don't necessarily see the point in a breast pocket on a polo shirt, as featured on this garment, as the only thing I’d find of use is to clip an ID badge onto it, and the majority of ID badges for sites are now in lanyard form. That said, this polo shirt has a really comfortable fit, is lightweight and breathable and is great for hot weather conditions. I also find polo’s to be smarter in appearance than a standard t-shirt. 2502 T-shirt This features a nice lightweight material that keeps you cool in warm conditions and is stretchy for manoeuvrability. It’s also useful as an extra layer when it gets a bit colder or when you're doing an active job that doesn’t need as much of a presentable attire for clients. 8004 Technology Fleece This is a very smart-looking fleece that’s particularly suitable for when the weather is not too cold, but is cold enough to need a second layer. It boasts ample pockets to house your wallet, phone and keys, which is good when you’re wearing it in an active job and your trousers or shorts don’t give you the amount of pocket space you require. Another nice feature of the fleece is the reflective strips, which mean you're easily visible and could make use of the garment in the evenings or in dark conditions. This fleece is easily versatile enough to be worn throughout the year, so wouldn’t be just restricted to your summer wardrobe.
they’re easy to move in (you could do squats in them without an issue), and provide you with real freedom on-site. They also keep you very cool at the same time. The traditional holster pockets are also included, along with a phone pocket that fits a smart phone rather than a Nokia 3210, like previous designs of trousers and shorts. The pockets are also nicely spaced off, so when you put heavy items inside it doesn’t pull the material of the shorts out of shape. This makes them more comfortable to wear over time. The only downside from my side of things was a couple of issues with the sizing on the shorts that I was sent; if you're an in-between size like myself, you may find the shorts can be too big/small, and not as nicely fitted as the Snickers trousers.
6413 Flexiwork Stretch-comfort Shorts I found that these shorts had some really nice features to them. Most importantly,
To download a copy of the 2019 Snickers Workwear catalogue, go to: www.rdr.link/eg020
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Products & Business Solutions
Pete 'Monty' Monfort, Proprietor at Monty Electrics and Director at Arena Training Centre, tries the T150 Tester from Fluke for size.
IS IT TIME FOR T? 'll start by stating straight off the bat that I was really impressed with this bit of kit – a versatile two probe tester that lends itself to all those working on electrical systems, especially those that undertake a lot of fault-finding and day-to-day maintenance on a regular basis. The rugged test leads are really strong, and the unit also features a handy device for storing probe tips. This then doubles-up as a useful tool that can be inserted into a UK socket outlet to release the line and neutral guards, allowing for direct probing of a socket outlet.
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Another thing to add is that the device is GS38 compliant, so it was used regularly to prove disconnection of supply. This everyday task is made simple in that it has an inbuilt proving unit, so you simply place the probes together and the LEDs light up. The instructions do make it clear, however, that the LEDs (and not the LCD screen) provide evidence of a voltage present (or not). One feature that I liked is that the device can measure the resistance of a cable. It checks continuity with an audible sound, has an inbuilt test button to check RCD additional protection function (<30mA) and indicates phase rotation as well. A handy built-in torch is a nice extra touch, and proved particularly useful when I discovered one really poorly positioned and ancient consumer unit located under the stairs on a job I was undertaking. Because I combine my teaching duties at college with running my own electrical contracting firm, the T150 was used in a whole range of scenarios. Mapping out the continuity of circuits was a doddle and the resistance measurement was also useful for identifying loose connections and high resistance joints.
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An obscure switch in one installation with no marking was easily checked for function with the audible continuity tester, while the phase rotation tester saved me a long walk to get my MFT on another occasion when I’d moved a three-phase rotary isolator and forgotten to mark up the line supplies. The instrument allows for the probing of UK socket outlets and, in most cases, a satisfactory reading was obtained, although I did test a couple of sockets and discovered that the probes didn’t enter deeply enough to make a good contact. From a safety perspective I’d prefer to see the probe tips permanently shrouded to 2mm as some people may be encouraged in such scenarios to forego the GS38 shrouds. That said, the instrument ‘auto-senses’ voltages, ensuring operator errors are largely eliminated in general use. Overall I’ve found the T150 Tester from Fluke to be a very useful addition to my ‘immediate action’ tool bag, which is by my side at the start of every job. As such, its gets a top recommendation from me! For more details about the T150 Tester from Fluke, go to: www.rdr.link/eg0
PRODUCTS & BUSINESS Solutions
LICENCE TO DRIVE Kelly Vincent and Elly White of Kelly Electrics test drive the Milwaukee M12 FUEL sub compact ¼” hex impact driver. o drive those heavy fasteners like thick screws or twisting nuts, you need a powerful impact driver to do so, and the Milwaukee M12 impact driver certainly isn’t lacking anything in this department. We’ve been using it on-site for a few months now, and one of the kitchen fitters we were working alongside noticed the tool and asked if he could give it a go while he hung some units above a worktop. Holding the cabinet with one hand and the M12 impact driver in the other, he had the unit secured in no time and was really impressed (as were we) with the speed, power and control of the drill. He’s not the only one who has been casting envious glances either, and we’ve had plenty of other trade professionals asking about the unit over the last few months. It’s eye-catching, perfectly sized and really easy to use, so it's not difficult to see why! I have to admit to a bit of a bad habit of forgetting to adjust my drill between jobs, meaning I often end up with
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stripped out screws to contend with. By using the Milwaukee impact driver, however, it’s so easy to switch between drive modes. This is thanks to its four-mode drive control feature which is easily accessible with your thumb, allowing you to use it and switch modes with the same hand. I also love the fact that it’s got a self-tapping screw mode, which is designed to reduce breaking and stripping out screws. The powerful motor is controlled by a variable speed trigger so it’s easy to regulate how much twist you give it – no over-driving into surfaces, and with the sophisticated REDLINK system and overload protection technology you don’t run the risk of damaging the drill. This unit balances really comfortably in your hands because of the ergonomic design, and I have to say that the overall attention to detail here is excellent. From the red LED power light on the side to the rubber hand grip design, these small features make a big difference to the end user.
The battery has excellent life and is fully charged in 90 minutes; we’ve been using the drill daily for a few months now without any need to re-charge it. The LED light is also very useful when you’re working in dark places and need that extra light – it’s almost as bright as any of my LED head torches! One tiny downside from my point of view is the belt clip, which is a little on the small side and doesn’t seem to clip onto anything securely, however this is a minor irririation. Overall I have to give full credit to Milwaukee for producing an excellent tool that is perfectly sized and will be prove to be a compact and versatile companion for many electrical professionals. To download a product data sheet giving more details on the Milwaukee M12 FUEL sub compact ¼" hex impact driver, go to: www.rdr.link/eg021
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Products round up
CED Meridian Outdoor LED Lighting Expanding its Meridian brand, CED has announced a range of Outdoor LED Light Fittings. In the range, there are 60W polycarbonate Wall Lanterns with IP44 rating and CE/RoHS approvals. These comprise black or white options with PIR, black with motion sensor, an up and down variant plus Ceiling and Post Top lanterns. There are also IP65-rated stainless steel Round and Square Walkover Lights (240V) in-ground fittings suitable for white or blue LED GU10 lamps. Also, wirefree Solar Lights are available, including 3W IP44 plus 3W and 4W IP54-rated PIR fittings designed for eco-friendly presence detection. www.rdr.link/eg022
MARSHALL-TUFFLEX Extended Firefly Fireclips Range To help meet the requirements of the updated wiring regulations, Marshall-Tufflex has extended its range of Firefly fire clips. In the event of a fire the clips are designed to prevent cables falling and creating a hazard – providing a safer evacuation and allowing easy access for fire service crews. The Firefly range now includes clips suitable for use on Marshall-Tufflex Maxi, Mono, Twin165, Twin Plus, Sterling Profile, Sterling Curve and Odyssey trunking systems. The clips fix to walls or ceilings and with a spring-loaded design are quick and easy to install. The Firefly fire clips are fire resistant above 1,000°C for up to 120 minutes and feature rounded ends to prevent damage to cables and injury to installers. The range includes both internal versions that are fitted within the trunking prior to cable installation, and externally fitted variants for a fast and simple retrofit. www.rdr.link/eg023
DEWALT Wall-Dog Screw Anchor The DEWALT Wall-Dog is an all-steel, one-piece screw anchor which provides an all-metal fixing solution to comply with the latest wiring regulations which require wiring systems to be supported in such a way that they will not be liable to premature collapse in the event of a fire; thereby prohibiting the use of non-metallic fixtures. The Wall-Dog requires no plug and, with its carbon steel body and deep-cutting, corkscrew-like threads, it provides for smooth entry and powerful hold in a variety of substrates, including wallboard, wood, masonry and concrete. It’s ideal for light to medium duty M&E anchoring applications such as fastening conduit, trunking, back boxes, and cable/fire clips. It has also recently gained an F120 fire rating. Wall-Dog anchors are available in packs of 100 in either white/chrome and pan/countersunk head types, and in lengths of 32mm, 50mm and 70mm. www.rdr.link/eg024
VENT-AXIA Cooker Hood w/ MVHR Vent-Axia’s Lo-Carbon Sentinel Kinetic Cooker Hood combines a cooker hood with mechanical ventilation with heat recovery (MVHR) in one unit. The product works seamlessly as an MVHR unit supplying energy efficient ventilation to the home and, when the cooker hood is needed, it is simply pulled out to provide a purge of cooker fumes. Ideal for small one or two-bedroom studio apartments, the Sentinel Kinetic Cooker Hood provides all the benefits of MVHR with all the advantages of a cooker hood. The unit is designed to fit in a 600mm wide aperture above a hob and so fits inside a kitchen unit for a seamless finish. It is pulled out when cooking and this triggers the MVHR unit to switch to a pre-defined boost speed and the summer bypass automatically opens to prevent cooking by-products entering the heat recovery cell. The hood incorporates removable metal grease filters, low energy lamps to illuminate the hob top and is available with a white or brushed aluminium front trim. www.rdr.link/eg025 PROFESSIONAL ELECTRICIAN July/August 2019 73
Products round up
Comfort and safety combined The Hultafors Group has recently added Hellberg Safety PPE products to its premium brand portfolio for professional tradesmen and women. With over 50 years’ experience in the PPE industry, the Hellberg Safety specialist equipment includes highly advanced hearing protection products, face protection and communication solutions for personal protection on-site. Including face guards, helmets and passive hearing protection with up to three levels of protection from low to extreme noise, Hellberg also supplies secure electronic hearing protectors to suit different work environments. Peter Dumigan, MD of the Hultafors Group UK, says: “Hellberg PPE products complement the Snickers Workwear and Solid Gear Safety Footwear product portfolios so well – in particular the newly launched Snickers Workwear ProtecWork Heat and Flame Protective Wear. “The Hultafors Group now provides the UK market with an even more extensive range of EN-accredited, top quality premium brand products, ideally suited to protect the personal wellbeing and safety of the discerning professional tradesman and woman". For more information on the Hellberg Safety PPE range, go to: www.rdr.link/eg026
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V-TAC New Products & Showroom Equipped with the latest IoT products from V-TAC’s SMART series – the company’s new showroom promotes its collection of WiFi-supported LED lighting solutions compatible with Amazon Alexa and Google Home. The new series includes easy-to-setup SMART RGB Lamps, Touch Switches, WiFi Plugs & Sockets, and more. Besides the smart products, the company has also developed UK-focused products, including CCT-changing fire-rated LED downlights, LED Round Slim Bulkheads, an emergency product range, 6-ft battens and 1200 x 600 panels. A new warehouse is located in the same building as the showroom, enabling V-TAC to complete orders within 24 hours. www.rdr.link/eg027
HAMILTON LITESTAT Metalclad Range Grid Option Hamilton Litestat has extended its popular Metalclad wiring accessories range to include grid-fixed plates. Suited to robust applications, such as workshops, garages, sheds, schools and industrial premises, the on-trend heavy duty design works equally well in properties seeking a modern industrial finish. The new Metalclad Grid accessories support complex wiring projects where an instant bespoke solution is required. The stylish steel range is available in 1-8-gang blank front plates with white inserts and white surrounds. Within the range is the 20AX Double Pole Key Switch “Emergency Light Test” module, which is supplied as standard in 3-8-gang units. Also added is the stand-out 1 gang 13A Double Pole Key Switch Fuse Spur, which comes in a striking red finish and incorporates a key test switch. www.rdr.link/eg028
Products round up
The first ‘smart’ fan is here Airflow Developments has launched iCONsmart, the first App controlled range of modular fans. The exceptionally quiet and efficient, IPX5 rated axial fan offers a simple installation and provides users with air quality insights to help identify issues and ensure a healthy indoor environment. iCONsmart is a highly efficient modular residential ventilation solution with connected capabilities and full Quiet Mark approval. It features a smart integrated flow sensor that will automatically adjust to the specific installation situation. This removes the need for manual alterations to be made during commissioning to achieve the required flowrate and minimises the potential performance gap. The innovative flow sensor also ensures consistent performance throughout the life of the system as it will automatically adapt to changing wind back pressures to maintain the correct level of ventilation. The iCONsmart is linked to the myAirflow App that provides an easy-to-use interface for contractors and users. During installation, the App guides the installer through the simple, intuitive set-up process to configure elements such as the activation range, overrun duration and silent hours. NICEIC approved installers can also use the app for certification and notification of works – a feature unique to myAirflow. The innovative design allows the fan to be tailored to your needs, with the addition of timer, humidity and motion sensing digital control modules. Furthermore, with IPX5 rating iCONsmart offers the installation flexibility to fit the fan in even the most demanding areas, including directly above a shower. The iCONsmart also features the unique, patented iris shutter to prevent backdrafts. To find out more about the iCONsmart, go to: www.rdr.link/eg029
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Smart Lighting? Go with the PRO! Lightwave, the Birmingham-based manufacturer of electrical products for installed home automation, is launching the Lightwave PRO scheme this month. The programme offers qualified electricians the opportunity to become Lightwave recommended installers by completing a training course, which covers everything from installation to configuration. Members then benefit from Lightwave marketing support, including a listing in the online ‘find an installer tool’, customer referrals and special offers/discounts from preferred stockists. The stylish connected switches and sockets Lightwave produces are easy to install using standard wiring and offer a convenient way to provide smart lighting and power solutions for customers without the need for trailing cables.
Once installed, the devices can be controlled by manual button press, smartphone, tablet (using the App) or by voice through a smart speaker. Jason Elliott, CEO comments: “We’re excited to officially launch this new initiative, which began with a small test group of electricians in May. The feedback has been immensely positive and we’re confident that the Lightwave PRO scheme will assist electricians in making the most of the opportunity offered by the growth in installed smart home tech.” New members will receive a starter kit containing Lightwave’s best-selling products and marketing materials, to help explain and up-sell customers to smart lighting and power solutions. With full professional support guaranteed on a dedicated hotline manned by qualified electricians, Lightwave promises an end-to-end service for it’s installers. To sign up to the Lightwave PRO scheme, go to: www.rdr.link/eg030 and complete the online form, or email: pro@lightwaverf.com
Products round up
FINDER Digital Time Switches Finder has introduced the 12 Series 16 A digital time switches for controlling applications such as lighting, CCTV and fountains. The Types 12.51 and 12.81 time switches can be programmed in ‘smart mode’ using Near Field Technology (NFC) on any Android smartphone, using the App available on the Google Play store, or manually in ‘classic mode’ via the joystick. The Type 12.51 allows daily/weekly programming, whereas the Type 12.81 includes an Astro program that calculates the sunrise and sunset times through date, time and location. Location coordinates can be easily set for most European countries through postcodes. www.rdr.link/eg031
MK ELECTRIC Essentials Range Designed to offer the reliability, fit and quality for which the company is known, MK Essentials offers a wide range of white switches and sockets suitable for smaller budgets, without compromising on customer expectations. Including USB outlets, LED dimming, and Euro modules, the range is also expandable, as Grid frontplates from the range are compatible with MK Electric’s Grid Plus range of modules, ensuring a breadth of product to meet the needs of any project. Developed with installers in mind, features such as backed out and captive screws ensure that MK Essentials is easy and convenient to install, with the reliability and performance expected from MK Electric products. Backed by a 25-year guarantee, the range delivers a truly fit-and-forget solution for complete peace of mind. From a customer perspective, the range is designed to look good, with screwless design and a high gloss finish delivering a contemporary aesthetic suited to any environment. www.rdr.link/eg032
DICKIES WORKWEAR 2019-20 Catalogue Dickies has unveiled its 2019-20 catalogue, featuring a brand-new layout plus 17 new products, including a selection of t-shirts and shorts in time for the summer season. The catalogue is over 300 pages long and the new design aims to make it simple for tradespeople and retailers to use. For example, footwear products are split according to safety classifications, while other sections include hi-vis, trousers and shorts, tops and outerwear for quick reference. New products include the Dickies GDT Premium Shorts, which are lightweight and easy to coordinate with other items within the GDT Premium range. Practical features include a hard-wearing Cordura pocket, plus wide belt loops and hip pockets. To download the catalogue, go to: www.rdr.link/eg033
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SCHNEIDER ELECTRIC Masterpact MTZ Modules Schneider Electric has launched a series of optional modules for the Masterpact MTZ circuit breaker, boosting its protection, measurement and maintenance capabilities. The tools will help energy and buildings managers safeguard their circuits and save costs through better power management and reduced downtime. The Masterpact MTZ family continues to be one of Schneider Electric’s smartest ranges of circuit breaker. With industry-first embedded Class 1 metering and improved performance in harsh environments, the MTZ can reduce operating costs and improves the safety of power distribution. The range is embedded with Micrologic X control units, which allow the circuit breakers to share and receive data, as well as be controlled and monitored remotely. These control units can now be enhanced with a new range of digital modules, which extend their capabilities in several key areas. The digital modules can be downloaded through the GoDigital website using the Masterpact MTZ Mobile App or via a computer running Schneider Electric Ecoreach software. www.rdr.link/eg034
Products round up
ETERNA LIGHTING LED Aluminium Lantern Range Eterna Lighting has recently launched a new range of stylish aluminium LED Lanterns, as part of the EternaPro Range. The range covers both standard and PIR models, providing 570 Lumens output. The decorative lanterns are aluminium constructed with polycarbonate diffuser, and the collection boasts 4000k colour temperature, A+ rated energy efficiency and an IP44 rating. The PIR sensor, which has a 110° detection angle and a 7m range, has a novel cover lid that rotates to allow access to the PIR controls. www.rdr.link/eg035
IDEAL INDUSTRIES EMEA Lever Wire Connectors Electricians often work on light fittings that require solid and flexible conductors (flex) to be joined together. With In-Sure lever connectors, contractors can make connections quickly and safely without having to use a screwdriver. They accept fine stranded conductors and can also be removed in seconds and re-used if needed. www.rdr.link/eg036
GRIPPLE Extended Fast Trak Range Gripple has extended its award-winning range of Fast Trak products with a series of faster, smarter, next level suspension solutions. A new side loading variant, alongside several accessories, has now been introduced to enhance its applications in the installation of mechanical services in all building types. The products enhance the offering for quicker, safer, tool-free and zero waste products which save time and labour. They feature side-loading and low-profile brackets and accessories for installation of electrical, HVAC and piping services. The Fast Trak range now offers a wider range of bracket length options as well as the option to side load services, ideal for areas of restricted space to install mechanical and electrical services with greater speed and flexibility. Complementing these are a range of accessories, including a Vibration Dampener Pad to reduce vibration associated with ducting, a secure J-Hook to help support data cables and a Bracket Cover to hide tracks on projects where aesthetics are a high priority. Fast Trak is claimed to be six times faster than traditional channel and rod methods, has a load capacity of up to 180kg, and can aid environmental credentials. It is also BIM-ready and fire-tested. www.rdr.link/eg037
RF SOLUTIONS Industrial Control Systems RF Solutions has launched two new Industrial Control systems to the current range; the ‘PRO-CARLTON’ and ‘PRO-TAURUS. Achieving a huge 16km range of operation (line of sight), the Pro Industrial systems use a LoRa Spread Spectrum Radio transmission protocol, which provides reliable long-range operation with excellent building penetration. They’re 868MHz RED CE certified and a 915MHz, FCC certification is expected to follow later in the year. Both systems are supplied ready to use straight out of the box – the PRO-CARLTON is a 16-channel, whereas the PRO-TAURUS is an 8-channel system. They both have rugged IP68 enclosures and internal Lithium batteries which can be wirelessly recharged or via standard microUSB type C. The receiver unit is rated IP56 with integral 110-230Vac power supply, containing industrial standard ‘DIN’ rail receiver and independent relay output modules. All modules are interchangeable. These new systems are great for applications such as industrial systems, quarry gate controls, shutter doors and operating industrial machinery. www.rdr.link/eg038 PROFESSIONAL ELECTRICIAN July/August 2019 81
Products round up
Heating that stands out from the crowd Rointe believes that heating should be an integral part of the home, not just for practical reasons but to transform the space into a comfortable and stylish area. That’s why it has introduced the new Designline special finishes collection. With colours and styles inspired by nature, you can add a touch of luxury to your customers’ space and help them enjoy a wide range of beautiful solutions designed for maximum comfort and energy efficiency. These new artisanal finishes are suitable for residential and commercial properties and are available in the Rointe D Series range of electric radiators and towel rails. They are particularly well suited to high-end construction projects like hotels and housing developments. Meticulously crafted by specialists, the Designline range adds style and efficiency without affecting comfort. Each product is unique with a flawless finish that will fit seamlessly into any décor. Through the use of metals and textures like 24 carat gold and marble, alongside a wide variety of colours like earthy reds and aqua blues, Rointe has created beautiful heating solutions designed with users in mind. They’re available in over 28 RAL colours and 12 special finishes that include metals along with oxide and marble effects. When it comes to finding electric heating solutions for your home, business or project, Rointe is among the best in the market. To view a promotional video, offering further details about the Rointe Designline range, go to: www.rdr.link/eg039 82 July/August 2019 PROFESSIONAL ELECTRICIAN
Products round up
SAXBY LIGHTING SirioDISC Adjustable The new SirioDISC Adjustable from Saxby Lighting is a versatile recessed or surface mounted LED luminaire. The ultra slim profile can be placed in the slimmest of ceiling voids and boasts a unique configurable bracket, allowing for installation into cut-out sizes from 65mm to 205mm. The bracket is easy to adjust, making installations quick and simple. The edge-lit technology and high power SMD LEDs offer an even, superior light output, with no dark spots, plus reduced glare. The SiriosDISC Adjustableâ&#x20AC;&#x2122;s unique design allows the installer to stock one universal luminaire suitable for both recessed and surface applications, ideal for residential and commercial projects. www.rdr.link/eg040
PROTEUS SWITCHGEAR AFDD Range The 18th Edition regulations recommends the use of Arc Fault Detection Devices (AFDDs) to reduce the risk of fire in areas such as sleeping accommodation, places containing irreplaceable goods and locations made from, or containing combustible materials. Proteus Switchgear has now launched its combined AFDD/RCBO device offering short circuit, overload, earth leakage and arc fault detection in a single device. In addition, the device fits its existing range of consumer unit, but also those manufactured over 30 years ago with no requirement for any bus bar reconfiguration. Available in B curve with 30mA Type A residual current protection, the device features a self-testing AFDD function (completed every hour) along with a fault status LED indicating what fault is present when the AFDD functions â&#x20AC;&#x201C; i.e. series fault, parallel fault, over-voltage or self-test error. www.rdr.link/eg041
Products round up
SNICKERS WORKWEAR 2019 Catalogue The 200-page Snickers catalogue has all you need to know about the UK’s most extensive range of working clothes. It features AllroundWork, RUFFWork, LITEWork and FLEXIWork clothing – Trousers, Jackets, Tool Vests, Shirts, Underwear, Accessories and much more – plus an extensive range of EN-certified PPE working clothes. There is also the street-smart stretch fabric for mobile comfort and a Layered Clothing System that ensures you can choose clothes to suit the weather on-site. It’s complemented by Snickers Profiling and Embroidery services and the most extensive range of garment sizes. To download a copy of the catalogue, go to: www.rdr.link/eg042
xcite Hi Bay With up to 148 lumens per watt efficacy, the xcite Hi Bay offers the latest in high output, industrial lighting, delivering energy efficiency and high quality illumination for large facilities. The next generation of xcite Hi Bay, launched recently, offers a choice of three sizes and four power options. The lightweight Hi Bay has been designed with installation in mind, supported by a separate stirrup mounting bracket, making the luminaire easier than ever for installers to fix in place. The aluminium body is IP65 rated, making it resistant to water and dust ingress, which are key considerations in warehouse, logistics and industrial environments. This, combined with the high quality driver, ensures that maintenance costs are reduced, particularly in contrast to metal halide fittings. Supplied in neutral white (4000K), the xcite Hi Bay is the ideal replacement for metal halide and SON fittings, delivering even light distribution, reducing shadowing and creating a brighter working environment. The Hi Bay offers a three-year warranty, backed up by its 30,000 hours lifetime and quality materials. www.rdr.link/eg043
GIRA Video Home Station 7
ESP GuardCam Wi-Fi Security Floodlight
Gira has launched the new and award-winning Gira Video Home Station 7, a modern surface-mounted video and door communication system with 7” TFT touch display. Recently awarded a Red Dot Award 2019, the product is designed to help your customers achieve a comfortable and secure living environment that embodies high-design. The 7” (17.78 cm) touch display automatically switches on the instant someone rings the doorbell, ready to conveniently operate and set functions via the intuitive menu. Users can define ‘favourite’ functions from the start screen, as well as ‘one-touch’ buttons that allow for super quick and convenient light control and door entry – even when the display is set to off-mode! ‘One-touch’ also provides access to communication records, allowing your customers to review missed visitors, deactivate set ringtones, manage image memory, make internal calls between installed systems and importantly, check system status. www.rdr.link/eg044
The latest addition to ESP’s GuardCam range of external area protection systems is a new Wi-Fi version – the GuardCam Combined Wi-Fi Security Camera and LED Floodlight – which allows remote viewing, monitoring and notifications via the specially-developed ESP GuardCamDECO App. The new system is a complete all-in-one, PIR floodlight, camera and DVR system, which offers an ideal low-energy external area protection solution for domestic and commercial applications. It incorporates a high-definition 1080p digital camera for superior quality images. The 16 SMD LED security lamp offers 5000k colour light with 1500 lumens – to produce a high quality, cool white light output. Flexibility to adjust the LED lamp and PIR is also featured, while the PIR sensor provides 180˚ x 10m coverage. The system is then very straightforward to install. www.rdr.link/eg045
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Products round up
KNIPEX Electrical Range Catalogue KNIPEX has launched its new Electrical Range catalogue that displays the wide range of tools it has designed specifically for the electrical sector. Whether you need to cut cables, strip wires, crimp end ferrules, or light up your workspace, the new catalogue has what you’re looking for. Products featured include the TwistCut which quickly and reliably cuts plastic corrugated pipes with no damage to internal cables or pipes; the Twistor16 self-adjusting crimping pliers for end sleeves (ferrules) with a crimp head that fully rotates 360°; and the slimmed down ErgoStrip which dismantles and strips all common round and damp proof installation cables, data cable and coax cable. Download a digital version of the catalogue by going to, www.rdr.link/eg046
SUPER ROD Ferret WiFi
Z10 SAFETY RANA LED Twin Spots This new family from Z10 Safety provides multiple solutions and great flexibility with 75° rotation and 80° tilt angles per spot with a unique compact design. The twin spots are designed for non-maintained operations and benefit from IK10 and IP65 ratings, making them suitable for indoor and outdoor installations, as well as most other demanding environments. Designed for wall mounts and 20mm conduit installations each twin spot comes with an IP65 cable gland and an installation kit. Moreover, each bulkhead can be remote-controlled to facilitate the scheduled functional and full duration tests. With an outstanding emergency output (up to 350 lumens using just 3W) and low stand-by power consumption (0.5W in non-maintained mode) the RANA Twin Spots are certified by the LIA according to BS EN 60598-2-22. They come with a five-year warranty on the luminaire and battery. www.rdr.link/eg047
Designed by award-winning New Zealand tech company The Cable Ferret, the Ferret WiFi uses the latest technology to stream high resolution video to a smart device in real time, making it the ideal tool for fast and accurate close-up visual inspections and troubleshooting in places which are too confined or hard to reach. The camera has six adjustable bright white LEDs on the front to provide crisp, clear 720p images, even in complete darkness. The Ferret WiFi is used in conjunction with a free Android or iOS app, which allows installers to save their videos and photos directly onto their smart device. Other handy features include an IP67 rated camera, a built-in WiFi hotspot and a wireless range of up to 12m. It also comes with a range of accessories, including a camera gooseneck to allow installers to point the camera in any direction. www.rdr.link/eg048
SWITCHTEC Sirena TWS Stackable Light Tower Available from Switchtec, Sirena’s TWS range of light towers provide visual and/or audible indication of the status of a wide variety of process machines, vehicles, lifts and other factory and industrial equipment. The range includes the new “S” multifunctional SuperBright LED module, offering no less than four effects – steady, flashing, strobe, and a new random effect. Exhibiting versatility, six different dome colours are available: blue, amber, red, green, yellow and clear. The basic principal of any light tower is to provide a quick visual indication, warning or notification. Most light towers are pre-assembled and have to be ordered in the required colour sequence, voltage and illumination type and are manufactured as a complete item. The TWS family provides flexibility to customers, stockists and distributors by the use of a modular system. The customer simply orders the colours they need, output type (flashing or continuous), then by use of Sirena’s simple assembly mechanism, stack the colour modules in the order required. www.rdr.link/eg049 PROFESSIONAL ELECTRICIAN July/August 2019 87
ELEX2019 PROFESSIONAL ELECTRICIAN
Sponsored by
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THE PROFESSIONAL ELECTRICIAN TRADESHOW 2019 SHOWS: Ricoh Arena, Coventry: Thursday 19th & Friday 20th September Sandown Park, Surrey: Thursday 7th & Friday 8th November Featuring:
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CAUGHT ON
C A M E R A SOCIAL SNAPS!
CJ Smith Electrical Services (via Twitter): Another DIY IP-rated box! Can't work out why the RCD keeps tripping!!!
Clint Proudfoot (via Facebook): Customer complained of no power, and when I found this mess I explained that it may need some sorting out. “It’s worked fine until now”, was the reply!
Steve Lyons (via Facebook): Customer paid £1,700 for a consumer unit upgrade. Nuisance RCD tripping afterwards, no grommets used, not fire sealed, one neutral spliced for two lighting circuits, non-sheared cables not protected, oh and it looks like spaghetti junction...
Flow Electrics (via Twitter): When the DIY customer hits not one, not two, but three T&E while hanging a kitchen cupboard. He said: “I can’t understand it, I used a cable locater”.
Rhys Cunningham (via Facebook): Found this on an EICR in London recently: bespoke switch made to measure, and superglued in place!
Colin Stewart (via Twitter): Discovered this on a recent job – this DB goes on to feed five other DB’s!
PROFESSIONAL ELECTRICIAN July/August 2019 93
RDR.LINK
HOW TO USE PE’S NEW WWW. RDR.LINK ENQUIRY SERVICE Never ones to rest on our laurels, we've updated our reader enquiry service to help you to get to the product, business or technical information you require, quickly and efficiently.
Introduced on the PROFESSIONAL back of long-term ELECTRICIAN & INSTALLER public demand, and ensuring that WIRING there's no need to ACCESSORIES panic if you've misplaced a recent &TECHNICAL TRAINING issue, you can now access a digital copy of your favourite magazine directly from our website. All you need to do is click on the 'Magazine' tab on our website, and you can view the past month's issue in digital format, complete with clickable links to take you to further information about products and articles you're interested in. Don't forget to also sign up for our FREE weekly e-newsletter while you're there, delivering the latest stories from www.professional-electrician.com directly to your inbox every week. E AD E TR TH
94 July/August 2019 PROFESSIONAL ELECTRICIAN
LOST YOUR BACK ISSUE OF PE? FEAR NOT! TO
How to use rdr.link On certain pages you may read: “To view a promotional or technical video for this product go to: www.rdr.link/ef101” (or similar). Simply enter www.rdr.link/ with the unique 5 digit code into a browser and it will take you directly to the mentioned resource – in this case the video. Alternatively, you can log directly on to www.rdr.link and type in any of the codes from the magazine into the prominent search box, and you’ll then be directed to the further content or information that you’re after. There's a tremendous array of online supporting aids out there for electricians, so our aim is to help to point you in the direction of the best ones without making you do the thinking yourselves. To that end we hope the new system will prove popular. But don’t just take our word for it; give it a try for yourself this month!
EE FR
What is rdr.link? With a wide array of online resources supporting the latest solutions – from videos to technical guides, PDFs to podcasts – it can be a challenge to locate what you need, quickly and efficiently. To ensure you don’t miss out on those valuable resources, we’re introducing rdr.link – a new, rapid service to transport you immediately to the online resources mentioned in our stories. Replacing our traditional paper ‘Readerlink’ enquiry card, all readers have to do is type the call-to-action codes located on each page into their web browser and they'll be taken directly to useful online content – whether that be supporting videos, further product information, white papers, technical downloads and more. It’s a simple, direct route to the relevant information online, as an alternative to trying to find out more via a search engine.
THE BUSINESS MAGAZINE FOR
THE ELECTRICAL TRADE
JUNE 2019
HAVE YOU GOT THE ‘ESSENTIALS’ IN YOUR SOCKET AND SWITCHES COLLECTION?
SURGE PROTECTION: IS IT AS EASY AS 1, 2, 3?
ALSO IN THIS ISSUE: NEWS & VIEWS
● CAUGHT ON CAMERA ● NEW PRODUCTS
● COMPETITIONS AND MORE…
ADVERTISER INDEX Aico Ltd...................................................................... Page 12
Integral Memory plc............................................... Page 69
Airflow Developments Ltd ................................... Page 92
Lightwave ................................................................. Page 86
ALL LED Ltd ............................................................. Page 20
LINIAN Supply Co Ltd............................................ Page 79
Armeg Ltd........................................... Outside Back Cover
Logic4training.......................................................... Page 79
Aurora Ltd................................................................. Page 27
M2 Electrical ............................................................ Page 34
Blauberg UK Ltd .................................................. Pages 6,7
Manrose Manufacturing ....................................... Page 85
CED............................................................................ Page 80
Metrel UK Ltd ................................................... Pages 50,51
CEDIA ........................................................................ Page 70
Milwaukee................................................................... Page 4
Clarkson Evans Ltd ................................................ Page 46
MK Electric ............................................................... Page 42
Collingwood Lighting Ltd ..................................... Page 66
NAPIT......................................................................... Page 63
Co-op Insurance Services Ltd............................. Page 72
NICEIC ....................................................................... Page 49
CP Electronics Ltd.................................................. Page 92
Prefect Controls Ltd............................................... Page 85
C-TEC Ltd .................................................................. Page 13
RF Solutions Ltd...................................................... Page 89
C-TEC Ltd ................................................................. Page 55
Robert Bosch Ltd .................................................... Page 37
DANLERS Ltd........................................................... Page 95
Rointe UK................................................................... Page 41
DEWALT.................................................................... Page 59
Saxby Lighting......................................................... Page 23
Di-LOG Test Equipment ......................................... Page 17
Scolmore International Ltd................................... Page 72
Dorman Smith Switchgear Ltd............................ Page 80
Seaward Electronic Ltd......................................... Page 52
Electrium Sales Ltd ................................................. Page 15
Selectric .................................................................... Page 65
Electrium Sales Ltd.............................. Inside Back Cover
Snickers Workwear Ltd ........................................... Page 2
Electrorad UK Ltd ..................................................... Page 11
SparkSafe .................................................................. Page 31
Electro-wind Ltd...................................................... Page 95
Super Rod Ltd ......................................................... Page 85
ELEX ................................................................... Pages 90,91
Tamlite Lighting ...................................................... Page 60
Elite Security Products Ltd................................... Page 62
Technical Consumer Products Ltd..................... Page 75
Emelux Lighting Equipment................................. Page 89
The Focus Training Group (DCET Training).... Page 95
ERA ............................................................................ Page 56
Trade Skills 4U........................................................ Page 89
Finder plc.................................................................. Page 70
Tysoft Software Ltd................................................ Page 95
Forum Lighting Solutions Ltd .............................. Page 32
Vauxhall Motors Ltd............................................ Pages 8,9
GreenBrook Electrical plc .................................... Page 38
V-TAC UK Ltd ....................................... Inside Front Cover
Hamilton Litestat..................................................... Page 83
Wiha Tools Ltd ........................................................ Page 79
IDEAL Industries Networks Ltd ........................... Page 77
Wise Controls .......................................................... Page 95
Illumino Ignis Ltd .................................................... Page 86