AUTUMN 2017
THE ONLY MAGAZINE FOR APPRENTICE ELECTRICIANS
INSIDE... MEET THE BRIGHT SPARKS FEMALE APPRENTICES BS7671: WHAT IS THE DPC? WISKA COMPETITION THROUGH THE KEYHOLE
WIN! FELO APPRENTICE TOOL KIT
EDITOR’S NOTE | AUTUMN ISSUE 2017 | SPARKS MAGAZINE
01
AUTUMN 2017
THE ONLY MAGAZINE FOR APPRENTICE ELECTRICIANS
INSIDE... MEET THE BRIGHT SPARKS FEMALE APPRENTICES BS7671: WHAT IS THE DPC? WISKA COMPETITION THROUGH THE KEYHOLE
WIN! FELO APPRENTICE TOOL KIT
EDITOR: BECKY MARTIN editor@sng-publishing.co.uk TECHNICAL CONTRIBUTOR: Michael Davies ADVERTISING: PATRICK BLORE / MATT ASBURY sales@sng-publishing.co.uk GRAPHIC DESIGN: STUDIO 74 www.studio74.design
MANAGING DIRECTOR: NATACHA FIELDING
natacha.fielding@sng-publishing.co.uk
PUBLISHER: CELIA MATTHEWS
celia.matthews@sng-publishing.co.uk
PRINTERS
Stephens & George, England
GENERAL ENQUIRIES To subscribe to SPARKS Magazine call 0870 774 3049 or subscribe online at www.sparks-magazine.co.uk DISCLAIMER SPARKS Magazine is published by SNG Publishing Ltd (SNG). All content and artwork is © SNG Publishing Ltd or its contributors and SNG is a trade mark of SNG Publishing Ltd. No part of SPARKS Magazine may be copied, transmitted or published in any form or by any means without prior permission. Although SNG has made every effort to ensure the accuracy of this publication, it does not verify any claims or other information appearing in the advertisements contained in SPARKS Magazine. It therefore cannot accept any responsibility whatsoever for consequences that may arise from the content or artwork contained in SPARKS Magazine, including any errors or omissions or any opinions or advice given therein. This publication and its content is not a substitute for professional advice on a particular matter.
Here at SPARKS Magazine we know that September is the beginning of your next step towards an incredible career within the electrical industry. If you haven’t seen us before, SPARKS Magazine is created to give you a little bit of extra help with your studies whilst giving you a break from your textbook. This is why you’ll find a mix of information, fun stuff and practice exercises within the pages of this magazine. Everything has been tailored especially for you as a student or apprentice electrician as you train to become the best newly qualified electrician you can be. In this issue we feature tools, containment systems, cables and cable management. We also go Through the Keyhole at Belfast Metropolitan College and in association with Voltimum and the ECA, we bring you the Hall of Shame so you can see how not to do some electrical installations! You can find all of the answers to the practice exercises on our website, as well as the latest industry news, monthly videos and online giveaways, so make sure to pay us a visit!
Becky Martin EDITOR
Advertisements are accepted for publication in SPARKS Magazine only upon SNG Publishing Ltd standard terms of advertising.
© SNG Publishing Ltd, 2017
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02 AUTUMN ISSUE 2017 | CONTENTS
SYLLABUS
WI N
Magnetism & Electromagnetism Electric Cables 1 Electric Cables 2 Cable Supports Steel Containment Systems Wiring Containment Multiple Choice Questions Hand & Power Tools Wordsearch Hand & Power Tools Multiple Choice Questions
PAGE 06
38 39 40 44 46 47 48 49
FEATURES 08 Here Come The Girls
SPARKS Magazine chats to two female apprentices on the C.K. tools Bright Sparks apprentice scheme
10 Product Review
Atiq Nazir of M.S. Electrical Engineers tells SPARKS Magazine what he thought of the Quickwire prewired junction box he tested
PAGE 10
12 Through the Keyhole
SPARKS Magazine has a nose around Belfast Metropolitan College
14 Mental Health Concerns for the Nation's Van Drivers
Mercedes-Benz Vans report on the exclusive research they commissioned to mark Mental Health Week 2017
16 Earth Leakage Explained
Megger discusses preventing earth leakage to avoid electric shocks
18 The Shark Range
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Introducing the low voltage joint solution from Wiska, that doesn't bite!
20 Makita Expands 10.8V CXT Range
Makita highlights how the valuable combination of power & features, coupled with compact physical size, makes this range attractive to any professional tradesperson
21 Just a Touch of a Button For More Cutting Power
Wiha showcase the 'BiCut' - a tool designed to meet all sorts of challenges
22 Tools to Make Your Life Easier
Knipex recommends a range of essential tools for every electrician's toolbox
26 Shining a Light on New Technology
Crabtree reminds us how important it is to keep up-to-date with progress in the industry
28 What is a Quality Cable?
BASEC highlight the important points to look out for to ensure cable safety
30 CEF Live is a Success
CEF report back on the success of the 2017 tradeshow
WI N PAGE 24
31 Will you be the Next SPARKS UK Electrical Apprentice of the Year?
Entry is now open for the 2018 competition. What you need to know about the biggest SPARKS event of the year!
32 More Support for Apprentices
The Apprentice Support Programme from The Electrical Industries Charity offers valuable assistance to help apprentices achieve their goals
34 BS7671: What is the DPC?
The IET answer some frequently asked questions on this topical subject
36 Setting the Standard
EAL highlights the benefits of qualifications
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REGULARS 27 Tweet All About It! 50 Hall of Shame
COMPETITIONS 06 WIN a Wiska Combi 407 Junction Box 24 WIN a Felo Apprentice Tool Kit
52 App-rentice 53 Products & Services
PAGE 31
01 Editor’s Note 04 Industry News
Introducing
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The app is free to download from The power is in your hands‌ Sign up to our portal today at schneider-electric.co.uk/electricianpartner
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SPARKS MAGAZINE | AUTUMN ISSUE 2017 | INDUSTRY NEWS
READ THE FULL STORY IN THE NEWS SECTION OF SPARKS-MAGAZINE.CO.UK
TAMLITE WIN PRESTIGIOUS NEW AWARD Tamlite Lighting has become the first company to win the Lighting Industry Association’s Quality Assurance (LIAQA) Award. The business, which distributes its products exclusively through CEF, was awarded the prestigious distinction due to its ongoing commitment to best practice, excellence and quality assurance. Launched this year, the LIAQA scheme aims to ensure suppliers of lighting and lighting-related products have processes in place that result in high product quality and standards compliance. Tamlite was a founding participant of the project and impressed the LIA’s judging panel with its dedication to maintaining high standards across its seven sites. TAMLITE.CO.UK
DOUBLE SUCCESS FOR JIB APPRENTICE EXCHANGE
SWA FIND A WINNER
Two electrical apprentices have been named as the lucky winners of the JIB Apprentice Exchange Programme and will travel to Australia in October to spend six weeks working ‘down under’. Joshua Horton of RB Emerson Group Ltd and George Stickings of T Clarke plc were chosen as the stand-out candidates following a challenging selection and interview process. During the trip, they will learn how the electrical contracting industry operates abroad and act as ambassadors for the industry, communicating with the UK via blogs and videos to describe their experiences.
Adam Garner of Dodd Group was the lucky winner in SWA’s national Tauras Challenge. Hundreds of installers from all over the UK were challenged to see how quickly they could install SWA’s Tauras Cable Gland Kit against a conventional SWA Gland. SWA’s Marketing Manager, Colin Fletcher, said: “Congratulations to Adam. His winning time of 24.4 seconds proves that Tauras Cable Gland Kits will save busy contractors time & money.”
JIB.ORG.UK/APPRENTICE-EXCHANGE.ASPX
SWAONLINE.CO.UK
INDUSTRY NEWS | AUTUMN ISSUE 2017 | SPARKS MAGAZINE
ECA TO SPONSOR SMART SOLUTIONS AWARDS 2017 Voltimum will hold the first ever Smart Solutions Awards on the 11th October at UK Construction Week, which is being held on 10th – 12th October at the NEC in Birmingham. Sponsored by the ECA (Electrical Contractors’ Association), the awards will champion installers who have demonstrated creativity and excellence on smart home and building automation projects over the past 12 months. The event will also celebrate the manufacturers and wholesalers that are helping facilitate the growth of this exciting market and have gone the extra mile to equip installers today, for the industry tomorrow. ECA.CO.UK
GET TOGETHER AND TRANSFORM THE LIVES OF THOSE IN NEED The Electrical Industries Charity is urging you to join its Practical Participation Programme. Once you sign up, the Charity will approach you on an as and when needed basis to ask for your assistance. This could be due to the need of equipment such as electrical supplies, building materials, heating equipment or skills required to help build house adaptations. Through its Practical Participation Programme, the Charity has helped many people to rebuild their lives and look forward to the future. For further information, or to join the Programme, please contact Vicky Gray: vicky.gray@electricalcharity.org ELECTRICALCHARITY.ORG
XPELAIR CELEBRATES 65 YEARS OF SUCCESS
When an inspection declared the emergency lighting and fire alarm systems to be unsatisfactory at Potten Woodentops Preschool, they were given just 14 days to turn around the situation or face having their license suspended. Darren Staniforth, technical development manager at NICEIC, decided to put his knowledge and contacts to good use. Having approached ESP, he was able to acquire all the products needed to update the fire alarm and emergency lighting provision. Products from ESP’s MAGfire fire protection range were fitted and the result was a resounding pass from the inspectors.
Developed in 1952, the GX6 has seen some impressive innovations. With a continued popularity in the UK, the GX6 has seen huge successes in the Middle East, Australia, South Africa and Hong Kong, with its roots of manufacturing beginning in the UK. Lee Stones, category manager for Xpelair, said: “This year marks a momentous year for the GX6 as the product is still going strong 65 years on. We continue to sell high volumes of product in our territories across the world and with constant innovation it remains as popular as ever.”
ESPUK.COM
XPELAIR.CO.UK.
ESP STEPS IN TO SAVE PRESCHOOL FACILITY
CP ELECTRONICS LAUNCHES MINIATURE OUTDOOR PIR A miniature IP65-rated PIR presence detector has been launched by CP Electronics, allowing for maximum ease of integration and installation into outdoor luminaires. It has been tested and approved to IP65 rating in accordance to BS60598-1 2015 standards for 15 minutes, demonstrating impressive water ingress protection. This makes it suitable for external applications, including car parks and street lighting. With a range of up to 16m at a 7m mounting height, the EBMHS-IP can be supplied pre-wired with an RJ11 plug for connection to the relevant power supply. CPELECTRONICS.CO.UK
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SPARKS MAGAZINE | AUTUMN ISSUE 2017 | COMPETITION
WISKA COMBI 407 JUNCTION BOX COMPETITION
The COMBI 407 junction box has been re-vamped and you could win a set of FIVE in either black, white or grey.
HOW TO ENTER... Don't miss out. For your chance to win, simply send an email to
admin@sng-publishing.co.uk
WISKA have taken this clever little box, and added a unique mounting bracket and 4 SDKF 5 pole terminals. The SDKF is a universal loop connector, 450V / 24A, suitable for solid, rigid and flexible cables with a clamping range of 0.08mm2 to 4mm2. The COMBI range already has many unique features, so now installation is easy and hassle free, with everything you need all in one box. Just open, install and go!
For more information, visit wiska.co.uk
and put ‘WISKA Competition’ as the email title. We’ll pick 6 lucky winners at random and notify them via email by 19th January 2018. Good luck!
HURRY!
COMPETIT ION CLOSES 19 JAN 20 18
KNIPEX Quality – Made in Germany
KNIPEX Cobra® Hightech Water Pump Pliers > Push the button for adjustment on the workpiece > Fine adjustment for optimum adaptation to different sizes of workpieces and a comfortable handle width > Self-locking on pipes and nuts: no slipping on the workpiece and low handforce required > Gripping surfaces with special hardened teeth, teeth hardness approx. 61 HRC: high wear resistance and stable gripping > Box-joint design for high stability due to double guide > Reliable catching of the hinge bolt: no unintentional shifting > Guard prevents operators’ fingers being pinched
KNIPEX Cobra® KNIPEX Alligator® Water Pump Pliers More output and comfort compared to conventional water pump pliers of the same length: 9-notch adjustment positioning for 30 % more gripping capacity Good access to the workpiece due to slim size of head and joint area > Self-locking on pipes and nuts: no slipping on the workpiece and low handforce required > Gripping surfaces with special hardened teeth, teeth hardness approx. 61 HRC: high wear resistance and stable gripping > Box-joint design for high stability due to double guide > Robust construction, insensitive to dirt; particularly suitable for outdoor work > Guard prevents operators’ fingers being pinched
KNIPEX Alligator® For more details please contact: Contact UK North: Mr David Barnes 07464847278 Contact UK South: Mr Richard Beesley 07770898298
www.knipex.com
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SPARKS MAGAZINE | AUTUMN ISSUE 2017 | INTERVIEW
HERE COME THE GIRLS The UK currently has the highest female employment rate in recorded history and the construction industry is thriving, with a consistent year-on-year employment increase. While these two facts should go hand-in-hand, construction is still a largely male-dominated industry, and the 11% of women in the trade account for only 1% of on-site roles. Although still small, the female workforce is quickly growing, with four times more women in construction than just five years ago. The significant progress being made may see women making up a quarter of the construction workforce by 2020 and apprenticeships play a huge role in the employee recruitment process. The C.K. tools Bright Sparks apprentice scheme has supported more than 22,000 electrical apprentices, both male and female, since it began in 2003. The scheme provides colleges with free tools and bursaries for use whilst training, allowing budding electricians to get to grips with the best hand tools the electrical industry has to offer.
ď‚Š To find out more about the Bright Sparks scheme, visit: carlkammerling.com/stockists/customer_ support/bright_sparks
INTERVIEW | AUTUMN ISSUE 2017 | SPARKS MAGAZINE
MEET KIRSTIN CAMPBELL Kirstin Campbell, 22 and studying at Fife College, has been a member of the initiative for three years. SPARKS: What attracted you to the electrical industry? KC: “I always knew I wanted to be something hands-on, like a plumber, joiner or electrician. My mum tried her best to raise a little princess, but I knew hairdressing or beauty therapy wasn’t for me! Unfortunately for mum, I am the biggest tomboy going.” SPARKS: How does it feel to be a female apprentice at college? KC: “Most of the other students on the course are boys, but everyone is very supportive on the apprenticeship and we all help each other out. It doesn’t make any difference that I am a girl, which is the way it should be.” SPARKS: What’s the best thing about training to be an electrician? KC: “Training to be an electrician is great, as there are so many options out there once we are qualified. It’s also a good job for helping family out, and even now when we are still training, I occasionally help my cousin and he helps me out as he is training to be a plumber. It’s such a practical skill set to have.” SPARKS: What’s been the highlight of your training so far? KC: “It’s difficult to choose a personal highlight as I have been lucky enough to gain experience of many different aspects of the job, but I have especially enjoyed fitting and installing solar panels. It is fascinating to see how solar panels work behind the scenes, and this is definitely an area that I’d like to gain more experience in. I hope to work on some more solar installation panels as they continue to grow in popularity.”
MEET ELYSE McBRIDE Elyse McBride, 23, is an electrical apprentice at Fife College and she is one of the many females the Bright Sparks scheme has supported. SPARKS: What made you decide to do this apprenticeship? EM: “I just kind of fell into my apprenticeship. I was initially at university studying Sports Science, but I didn’t enjoy being away from home, so I left after my first year with no plan. “My dad works in construction and my brother was halfway through a plumbing apprenticeship, so when the opportunity came up to do an electrical apprenticeship, I thought it was worth a shot. My family were very surprised when I started the apprenticeship and I don’t think anyone believed I’d stick it out if I’m being honest.” SPARKS: Has the experience been what you expected it to be? EM: “I didn’t have many expectations going in; I assumed it was all crouching in dirty crawl spaces in people’s houses, but this wasn’t the case. I mostly work on new builds, which are pretty clean. The job is very active too and there’s always something to test you and make you think. It’s never boring.” SPARKS: Were you nervous about being a female in this type of environment? EM: “I’ve been lucky enough to work on many sites with the same contractors so it tends to be the same group of people who know me. There has been the odd time where I’ve been on a new site where they don’t expect a female but overall there are no issues and everyone sees I am there to learn and deliver the job.” SPARKS: Where do you see yourself in the future? EM: “I’m currently undertaking my National Certificate in Quantity Surveying, which is the career path I’m currently going down. I’d love to be able to have as many qualifications behind me as possible so I have lots of different opportunities wherever I go in the world.”
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SPARKS MAGAZINE | AUTUMN ISSUE 2017 | FEATURE
The ease of connection and decommission of wiring in a circuit has come to the next level with Quickwire.
Atiq Nazir of M. S. Electrical Engineers tries out the Quickwire prewired junction box. “This product has been engineered to a high standard and is a quality product. As electricians, we use the very best products in all of our installations and this will certainly be added to our list of those in our future installs. “The ease of connection and decommission of wiring in a circuit has come to the next level with Quickwire. The product has been designed to take both 1mm and 1.5mm twin and earth cable, and it works just as well for either. To my knowledge this product also complies with the latest electrical regulations. Cables cannot be forced out of this connector. It has a hold off greater than any ordinary person would apply in any normal given circumstance. “Other advantages that it has are that it is small, compact and can be secured using the well-engineered clip. It’s excellent for using when installing downlights and it can be re-used many times over. “In some instances we need to use a 3 core and earth: if this can be incorporated it would be greatly advantageous for installing cable for timer fans. “Thank you for letting us comment on this product.”
For further information visit quickwire.co.uk
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SPARKS MAGAZINE | AUTUMN ISSUE 2017 | FEATURE
Ever fancied having a nose around another college? Then look no further. This issue we went through the keyhole at Belfast Metropolitan College to indulge the nosey parker in you and we liked what we saw!
WHERE
Belfast Metropolitan College is the largest Further and Higher Education College in Northern Ireland and one of the biggest in the UK. It’s one of only thirty colleges in the UK to join the influential 157 Group. Founded in 1906 and with 37,000 student enrolments a year, Belfast Met works at a strategic level to provide education, training and skills to enhance individual, community and economic success. Plumbing / Heating and electrical trades are an important part of Belfast Met’s and indeed the industrial city of Belfast’s past and future. Each of the tutors who teach in these areas have vital industry experience which they are only too happy to pass onto the students.
FEATURE | AUTUMN ISSUE 2017 | SPARKS MAGAZINE
SPARKS EVENT
Belfast Met was thrilled to be given the honour of hosting the Northern Ireland regional heat of the SPARKS Electrical Apprentice of the Year Competition on 2nd March at its Belfast City Centre Millfield Campus. The Northern Ireland regional heat played host to apprentices from all over the country competing against other students on practical tasks. It was a great opportunity for lecturers, employers, industry leaders and manufacturers to get involved and support the next generation of tradespeople.
Visit belfastmet.ac.uk follow @bfastmet like Belfast Met
OTHER TRADES
Welding, Bricklaying, Woodwork.
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SPARKS MAGAZINE | AUTUMN ISSUE 2017 | SPONSORED FEATURE
MENTAL HEALTH CONCERNS FOR THE NATION’S VAN DRIVERS Exclusive research commissioned by Mercedes-Benz Vans UK Ltd to mark Mental Health Awareness Week 2017 explored for the first time the issue of mental health within an often overlooked yet vital business community the nation’s van drivers, delivery professionals and van operators - who help to keep business moving.
Mercedes Sprinter
The research, conducted amongst 2,000 van owners and operators, highlighted that almost one in five van drivers describes their current mental health as poor or very poor, with three-quarters commenting that work is a contributory factor.
More than half of the van drivers with poor mental health said that increased time pressures (52%) and increased workload (50%) are factors affecting their mental health, with one in three believing that job uncertainty is contributing to their poor mental health and 17% of delivery drivers adding that road congestion is impacting on their state of mind.
Despite this, only one in three van drivers who believe their mental health to be suffering have spoken to their manager about their concerns, with more than one in 10
We need to create a culture in which anyone experiencing problems can ask for help in the knowledge that they will be supported. (12%) who haven’t spoken to anyone about their mental health at all. Steve Bridge, Managing Director, MercedesBenz Vans UK Ltd, commented: “With a continued surge in online shopping, an increasing reliance on same-day deliveries and spiralling traffic volumes across the UK, the real-world pressures on van drivers are changing. “Our research findings act as a clear call to van drivers to talk about their mental health concerns and work pressures with their employers and for employers to actively listen to the real concerns of their workforce not only during Mental Health Awareness Week but beyond.” James Harris, a spokesperson for the Mental Health Foundation said of the
research: “Compared to the national average, these figures indicate that van drivers are experiencing an increased rate of poor mental health. In part this may be explained by the pressures of the job, and the fact that van drivers can often be isolated. “This is important because we know that men are less likely to reach out for help, and are four times more likely to end their life by suicide. We need to create a culture in which anyone experiencing problems can ask for help in the knowledge that they will be supported.”
More information regarding mental health and tips on how to look after it, can be found at mentalhealth.org.uk
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SPARKS MAGAZINE | AUTUMN ISSUE 2017 | SPONSORED FEATURE
EARTH LEAKAGE EXPLAINED Do you have questions about earth leakage? Simon Wood of Megger has the answers! Earth leakage is electric current that finds its way to earth via an unintended path. There are two categories: unintentional earth leakage, which results from faulty insulation or equipment, and intentional earth leakage, which is a consequence of the way equipment is designed.
It seems strange to “design in” earth leakage, but it’s sometimes unavoidable. IT equipment, for example, often produces some earth leakage, even when it’s working properly.
Preventing earth leakage Whatever the source of earth leakage, it must be prevented from causing electric shocks. This is usually done by using either RCDs (residual current devices) or RCBOs (residual current circuit breakers with overcurrent protection). These measure the current in the line conductor and compare it with the current in the neutral conductor. If the difference exceeds the mA rating of the RCD or RCBO, it will trip. Most of the time, earth leakage works as intended, but sometimes an RCD or RCBO keeps tripping for no apparent reason: this is “nuisance tripping”. The best way to tackle this is with an earth leakage clamp meter, such as the Megger DCM305E. This is clamped around the line and neutral conductors together (but NOT the protective conductor!) and it measures the earth leakage current.
The best way to tackle “nuisance tripping” is with an earth leakage clamp meter, such as the Megger DCM305E. To decide which circuit is causing nuisance tripping, turn off all the MCBs in the consumer unit and position the earth leakage clamp around the mains cables. Turn on each circuit in turn. If one causes the earth leakage to increase significantly, this is likely to be the problem circuit. Next decide whether the leakage is intentional. If it is, some form of load spreading or circuit splitting will be needed. If it’s unintentional leakage – the result of a
fault – the fault must be found and repaired. Don’t forget the problem might be a faulty RCD or RCBO. To check, do an RCD ramp test. If it’s a 30 mA device – the most common rating – it should trip somewhere between 24 and 28 mA. If it trips at a lower current, it probably needs replacing.
Visit uk.megger.com
New multifunction tester
The complete single-phase installation tester MFT1711 Includes the features you demanded ¢ Auto RCD test ¢ 2 and 3 wire non-trip loop tests ¢ Zmax for final ring circuit testing ¢ Variable and selective RCD tests ¢ TRMS Voltage measurement Combined with Meggers leading input protection system, auto start capability and menu free operation, the MFT1711 ticks all the boxes! Call 01304 502 101 for your free leaflet or visit uk.megger.com Megger Ltd, Archcliffe Road, Dover, CT17 9EN, UK. T. 01304 502 101
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SPARKS MAGAZINE | AUTUMN ISSUE 2017 | FEATURE
THE SHARK RANGE THE LOW VOLTAGE JOINT SOLUTION THAT DOESN’T BITE
For several years now, WISKA have been supplying the SHARK range, a pre-filled gel insulated joint available in several sizes. So, what makes the SHARK range so unique and what can it offer to installers? Let’s start with the gel! The gel is pre-poured into all SHARK products, meaning no mixing or waiting, simply fit and go! This immediate operational use allows you to avoid waiting up to 43 minutes (at 5°C) for resin to set. What’s more, this gel is re-enterable so unlike resin, if you need access to your terminal, you can.
...a unique clamping mechanism ensures strain relief is met in accordance with EN 62444. Range, WISKA have also ensured the housing and accessories provide a secure solution.
Additional features Lastly the gel is nontoxic and has no expiry date, making it safe to use whenever suits you.
As well as the gel aspect of the SHARK
The SHARK SH506W and SH525W comes complete with internal earth wire springs for earth continuity on SWA cables. In addition to this, a unique clamping mechanism ensures strain relief is met in accordance with EN 62444. A cable tie in each corner provides further
protection and restricts access into the joint. Put all of this together and you get the SHARK Range from WISKA. The SHARK Range, the low voltage joint solution that doesn’t bite! For more information, contact WISKA by visiting wiska.co.uk
Sparks Ad - Unior Tools Final 18Jul17 Outlined.pdf
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SPARKS MAGAZINE | AUTUMN ISSUE 2017 | FEATURE
MAKITA EXPANDS 10.8V CXT RANGE Makita is expanding the increasingly popular 10.8V range of power tools where superb machine power performance is coupled with the compact physical size of the machines. Versatile range This valuable combination of power and features, integrated into the smallest possible machine profile, makes this range attractive to any professional tradesperson working in confined spaces or for prolonged periods of use where a full size machine would prove cumbersome.
The new Makita TL064D Angle Impact Driver CXT runs up to 2,000rpm, can deliver up to 3,000 impacts per minute, and generate a powerful 60Nm maximum tightening torque.
Angle Impact Driver CXT features Weighing just 1.6kg this useful impact driver will drive home an M12 bolt, M8 machine screw, HT bolt and 75mm coarse thread screw. The slimline body with soft-grip handle can accommodate the drive head fitted at 12 different positions for convenient use. The TL064D features an aluminium drive head with phosphorescent protection ring, variable speed trigger, electric brake and forward / reverse selection. Where access is restricted this compact and slim angle tool will prove ideal for many applications.
Also in the range is the Makita TD111D impact driver with Brushless motor which delivers an outstanding 135Nm of tightening torque yet weighs just 1.1kgs with an overall length of only 135mm from chuck to back of body.
The new Makita TD111D impact driver with Brushless motor and CXT slide battery will deliver up to 3,900 impacts per minute in high-mode with capacity to drive home an M14 bolt. This compact 1.1kg machine features the latest A-mode impact operation, which drives the fixture slowly to begin with until the thread tightening reacts when the full power is switched on to drive the fastening home. This mode eliminates screw cam-out and cross threading, which causes the fixing to fail. In addition, the TD111D has the variable speed trigger, electric brake, soft grip handle and LED job light. The TD111D is available with a charger and two 2.0Ah batteries in a Makpac connector case, or as a body-only machine for those operators with sufficient 10.8V batteries. Operating for 45 years in the UK, Makita have independent distributors located throughout the UK, with an extensive inventory of over 620 products and accessories. ď‚Š Visit makitauk.com
FEATURE | AUTUMN ISSUE 2017 | SPARKS MAGAZINE
JUST A TOUCH OF A BUTTON FOR MORE CUTTING POWER Heavy-duty diagonal cutters, heavy-duty wire cutters, compact bolt cutters or special diagonal cutters — often you have to bring along individual cutting tools in your tool box for each and every different job. With the BiCut, Wiha offers a switchable diagonal cutter that can be used for all sorts of challenges. If the normal performance of a heavy-duty diagonal cutter is not sufficient, it can simply be doubled with the press of a button. Whether it is for cutting cables, nails, screws, wire cables or other materials, diagonal cutters are tools for all sorts of applications and varying material hardness from soft to extremely hard.
Innovative tools To avoid bringing along multiple tools for a variety of cutting tasks, Wiha, the manufacturer of innovative hand tools, offers the BiCut. It is unique as it can be used as a heavy-duty diagonal cutter as well as a high-performance diagonal cutter, meaning the tiresome changing of tools and expensive purchase of diverse cutting tools is reduced. If used normally, the BiCut, die-forged from C70 steel, easily cuts objects such as cables, iron nails or even hardened spring wire. If something cannot be cut through in the normal mode, the BiCut is specially equipped for cutting extremely hard materials with a unique support mechanism. With a simple press of a button, the cutting power is doubled.
If used normally, the BiCut, die-forged from C70 steel, easily cuts objects such as cables, iron nails or even hardened spring wire. User comfort Users that carry out normal cutting tasks for a long period of time also benefit from the doubled cutting power because they correspondingly need 50% less force. The user expends less effort and strain on the muscles, tendons and ligaments in the hand is reduced. Therefore, using the BiCut, awarded with the Red Dot Award 2014, always remains comfortable because it can easily be switched with one hand. Additionally, the grip ridges are designed to be extra wide and the soft and hard zones on the grips are optimally adjusted to the ergonomics of the human hand in order to enable pain-free and comfortable working. The BiCut from Wiha is available in different varieties including the VDE certified version, Professional electric. On the company website, Wiha shows detailed information and videos about its BiCut family.
ď‚Š For further information, visit wiha.com/en
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SPARKS MAGAZINE | AUTUMN ISSUE 2017 | FEATURE
TOOLS TO MAKE YOUR LIFE EASIER As an apprentice, it is important to have all the right tools available for the job. KNIPEX, the pliers specialist, is always looking to make the life of the electrician easier and continues to introduce essential tools for every toolbox. Many of its tools save significant space in your toolbox, as well as time and effort on site.
When it comes to crimping, look no further than the KNIPEX Crimp Assortment. The kit (article number 97 90 10) which comes in a sturdy plastic Tanos Mini Systainer®, helps make every crimping job more straightforward.
The T-Loc fastener on the Systainer® allows for one-handed operation – you can open or close with one turn and connect to a second Systainer®. Once connected, the clever system allows you to access all content without disconnecting. The box contains two stackable plastic inserts, with six trays for connectors and a large assortment of end sleeves with a collar.
When it comes to accessing cabinets, lockers and shut-off systems, you could carry around a variety of keys in different sizes. But there is now no need to waste time and energy hunting for the right fit when you can just reach for the KNIPEX TwinKey to open them all.
Kit contents The kit includes auto-adjusting crimping pliers for end sleeves up to 16mm² and an insulation stripper that is self-adjusting on conductors up to 10mm², so you can have both tools available at once. The narrow handle on the crimping pliers and its toggle lever (which maximises transmission of force) make the tool comfortable and secure to use.
Knipex TwinKey benefits This tough little multifunctional tool is designed to meet the highest requirements. Pop it on your tool belt and use it to gain access to cabinets, lockers, cupboards and when controlling heating and ventilation systems, air conditioning or gas and water supply and shut off valves. It’s a challenge to find something it can’t open! The lightweight 8-arm version has two 4-way spider keys, which are connected with a powerful magnet to save space. A reversible bit is joined to the key by a stainless steel wire. KNIPEX has been at the forefront of innovation in the pliers industry for almost a century, providing high quality tools that meet the toughest demands. With the Crimp Assortment and TwinKey to hand, even the toughest days on site will seem that little bit easier. For more details on the KNIPEX range visit knipex.com
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SPARKS MAGAZINE | AUTUMN ISSUE 2017 | COMPETITION
FELO APPRENTICE TOOL KIT COMPETITION
German hand tool specialist FELO are introducing a new apprentice tool kit, which three people can win by entering this competition. The 10-piece kit comes with a free tool pouch and its retail price is £140. It contains five Ergonomic screw drivers with the most advanced handle design that adapts to the user’s hand. There’s also a pair of VDE pliers, a pair of cutters with induction-hardened cutting edges, a safety lanyard, a cable stripper and a mains testing screwdriver.
For more information, visit felo.com/en
HOW TO ENTER... Don't miss out. For your chance to win, simply send an email to
admin@sng-publishing.co.uk and put ‘FELO Competition’ as the email title. We’ll pick 3 lucky winners at random and notify them via email by 19th January 2018. Good luck!
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SPARKS MAGAZINE | AUTUMN ISSUE 2017 | FEATURE
SHINING A LIGHT ON NEW TECHNOLOGY It’s always worth checking out the lighting control accessories that are available to you because features progress so much over time.
Accessories in the Crabtree Instinct range have been designed with the installer in mind, simplifying some of the common problems they might encounter when installing.
Screw fixing for security Many grid switch modules are clipped in, but some have a tendency to dislodge over time due to cable pressure or general wear and tear. This can create a real concern from a health and safety perspective and make the installation process frustrating.
Accessories in the Crabtree Instinct range have been designed with the installer in mind... the various lamp types and loads, meaning that the dimming feature of the lamps may not be as effective as desired, or not work at all. The intelligent LED dimmers of the Instinct range can gauge the load of the lamp and then learn each individual demand.
Key card solutions Grid mounted switches that are clip fixed and secure screw fitted, like that of the Instinct range, are not only easier and safer to install, but also more reliable in the long term as they provide a secure fitting that will not allow them to move from their mounting in service.
LED Dimmers Installation of LED dimmers are never easy jobs. The biggest issue installers find with LED dimmers is the lack of compatibility with
Key card light switches, commonly found in hotels and commercial buildings, are unique in having a low current rating. This means they cannot be connected directly to a load circuit, which creates a host of installation and wiring challenges for installers.
The Instinct range’s key card switch is 20AX rated. This high rating allows it to be directly connected to the load (lighting or power circuits) without the need for a separate control circuit or a special and costly silent contactor.
Quicker installation Having to spend a long time on a job that should be quick and simple is frustrating for anyone. This is particularly the case for installers working with accessories that seem to have been designed to make the job harder than it has to be! Accessories that have an upward-facing inline terminal makes the job much easier. With no need to rotate or twist the accessory, not only is this a safer and more reliable connection method but also a faster and simplified installation job. When it comes to innovation, it’s clear that the accessories associated with lighting should not be left behind. Not only are safety and aesthetics increasing in priority to exceed industry requirements, but simplicity and the installation process are now key factors for innovative new designs.
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SPARKS MAGAZINE | AUTUMN ISSUE 2017 | SPONSORED FEATURE
WHAT IS A QUALITY CABLE? Cables come in a range of types, sizes and core numbers, used for many different purposes. They are also made from a wide variety of different materials, some intended to provide enhanced performance for specific uses, such as fire protection.
Cable types Cables are made to standards and specifications by many different manufacturers, some based in the UK and others overseas. Most cables used by installers in the UK will mainly be a few common types, such as flat twin and earth, conduit wire, and armoured, but even these come in different varieties such as PVC, or low-smoke, halogen-free. So how do you check whether a cable is the right one and of good quality for the purpose intended?
NEW REGULATIONS
All cable should be marked with a manufacturer’s name or brand, which is known as the origin mark. It should also carry the type, standard or specification, plus information such as the size or year of production.
If a cable is not marked with a recognised quality mark, then be cautious.
In 2017 new requirements came in for cables, which must now comply with the Construction Products Regulation (CPR). This is a fire safety requirement for all cables being installed into buildings. New forms of label, including the fire performance class such as Eca or Cca, should now be placed on cable coils and reels, and on larger, cut lengths of cable.
Establishing quality The quality of a cable can be checked in the form of a certification or approval mark, such as the BASEC mark or the HAR mark. This means that an organisation like BASEC has inspected the factory, has tested samples of the cable, and is continuing to retest the cable to make sure that it remains in line with the specification. Approval marks should also be on reel labels. If a cable is not marked with a recognised quality mark, then be cautious.
If there is doubt about the approved status of a cable, it is possible to check this on the approval body’s website, such as www.basec.org.uk, and to download the cable’s certificate for your files. Visit basec.org.uk
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SPARKS MAGAZINE | AUTUMN ISSUE 2017 | SPONSORED FEATURE
CEF LIVE IS A SUCCESS Around 3,000 visitors attended this year’s CEF LIVE event, the bi-annual electrical tradeshow hosted by the UK’s expert supplier of electrical products and services, CEF. Held at the NEC Arena on 8th and 9th June, the two-day exhibition featured exclusive insight into the much anticipated 18th Edition of the IET Wiring Regulations.
Tony Cable and Darren Staniforth of the NICEIC drew in hundreds of audience members for their preview of the upcoming regulations. The IET’s Mark Coles and Stephen Devine discussed how energy efficiency will feature in the new legislation and the importance of avoiding sub-standard products. Both days also included seminars on how to legally deal with electrical waste – a key environmental issue within the industry – as well as demonstrations of best practice when it comes to electrical safety.
In addition to educational knowledge seminars, attendees and CEF customers were treated to on-the-day deals from over 50 leading brands. They were also given the chance to win and trial their latest products and innovations. These included DeWALT, Milwaukee, Klein Tools, Dimplex, Electrium, Schneider Electric, Eaton, 3M and Aico, along with technology innovators Nest and Hive.
New for 2017 In a new development for the 2017 event, the second day of CEF LIVE featured a special focus on young professionals in the electrical contracting sector, where there were a host of activities designed specifically for those entering the trade. Supportive workshops and fun challenges, hosted by JTL were available for those looking to develop their industry knowledge and skills. Chris Ashworth, General Manager, CEF said: “CEF LIVE 2017 was an incredible success - even bigger and better than 2015 and the response we have had from customers and suppliers has been overwhelmingly positive. In fact, the feedback has been so great we have already committed to dates for CEF LIVE 2019. “We’re extremely thankful to everyone who supported CEF LIVE this year, especially the
exhibitors, speakers and attendees. There was a great buzz and with the skills gap continuing to grow, it has never been more important to promote our industry as the vibrant and dynamic sector it is today.” For more information visit cef.co.uk
...thank you to everyone who supported CEF LIVE this year, especially the exhibitors, speakers and attendees. There was a great buzz...
UK COMPETITION | AUTUMN ISSUE 2017 | SPARKS MAGAZINE
31
The winner of the biggest SPARKS event of the year will go home with thousands of pounds worth of prizes from our major sponsors… What happens then? How does it work? Each college can put forward one student for the competition. You can find the online application form on the SPARKS Magazine website at www.sparks-magazine.co.uk and it must be completed no later than 1ST DECEMBER 2017. The entrant must be a Level 2 or 3 student who has completed an in-house practical test successfully and be no older than 24 years of age. Previous finalists cannot be entered and there can be only one student entered per college or campus.
Students will be invited with their lecturers to attend one of seven regional events around the UK where they’ll spend the day competing against other students on practical tasks. Keep an eye on the SPARKS Magazine website to find out where these regional heats will take place. The winner of each regional heat – plus the person who has received the highest score overall from all of the seven regional heats - will then go forward to the grand final which will be held on 11th & 12th April 2018.
What did this year’s winner have to say about it?
2017 WINNER
Thomas Seward from Coleg Gwent said: “I had butterflies when my name was announced because I wasn’t expecting it! Taking part and being in the final has been great.”
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32
SPARKS MAGAZINE | AUTUMN ISSUE 2017 | FEATURE
THE ELECTRICAL INDUSTRIES CHARITY: MORE SUPPORT FOR APPRENTICES
There are lots of young, talented people in the electrical sector who are struggling to build a brighter future for themselves due to a wide range of unforeseen circumstances. Some may have an illness that is standing in their way, others may be caring for a loved one, or they might simply not have enough income to create the life they deserve.
and assistance, legal advice, apprentice scholarships and bursary schemes, and support for carers.
Case studies The Electrical Industries Charity understands the importance of young talent in the industry, so they have launched the Apprentice Support Programme, which helps young leaders of tomorrow to reach their potential and build a life for themselves.
The Apprentice Support Programme The Apprentice Support Programme allows apprentices to get the essential support they need to keep going towards their goal. The support that the Charity provides includes career development and transition assistance, debt advice, financial grants
Jack Terrins is one example of someone the Charity has helped through this Programme. At the age of 21, Jack has a role caring for his mum while trying to complete his apprenticeship. In the past two years he helped his mum on her cancer journey, and although there are a lot of cancer charities and nurses who were willing to provide emotional support, there was no financial assistance available. Jack has applied for and been granted the Electrical Industries Charity’s first Apprenticeship Bursary which will allow him to pursue his career while also helping him to care for his ill mum. Billy is another example. At the age of 20 he was diagnosed with bone cancer in the final year of his apprenticeship, which was extremely aggressive and required a life-saving amputation. To regain his independence and complete his apprenticeship, Billy needed a prosthetic limb. His family, together with the support of the Electrical Industries Charity’s Apprentice Support Programme and the local community, were able to raise the
money for the limb which has enabled Billy to continue his career. Jack and Billy’s stories are just two of many examples that outline the difficulties that the future stars of our industry are facing to reach their goals and defines the benefits which the Apprentice Support Programme is bringing to our industry. Visit electricalcharity.org
The Apprentice Support Programme allows apprentices to get the essential support they need to keep going towards their goal.
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SPARKS MAGAZINE | AUTUMN ISSUE 2017 | REGULATIONS
BS7671: WHAT IS THE DPC? You might hear a lot of discussion about the recently published DPC of BS7671. In this article, the IET answer some frequently asked questions. What is a DPC? A DPC is a Draft for Public Comment. It is the document that includes all the changes that are being proposed to BS7671 the Wiring Regulations. It is an opportunity for everyone in the industry to see what is being proposed and to comment on the proposals.
Who decides what goes into the DPC? There is a committee that is responsible for maintaining and updating BS7671. The committee is called JPEL/64 and is comprised of four sub-committees that each cover specific areas of the industry. Many of the changes proposed for the 18th edition have already been implemented in the European standard HD 60364 developed by CENELEC
(the European Standards body for the electrotechnical industry) and the IEC (the international Standards body for the electrotechnical industry). You can read more about JPEL/64 and how it works in the Student’s Guide to the IET Wiring Regulations. How could I have my say? BS7671 is published jointly by BSI (the British Standards Institution) and the IET. The DPC is published on BSI’s website: https:// standardsdevelopment.bsigroup.com/ projects/2016-01445. You could add your comments to each Regulation as you went through, saving them as you went. Comments could only be considered if accompanied by a proposal for improvement / change. You had until 23rd August 2017 to submit your comments and after this date, the DPC period closed and no more comments could be submitted. JPEL/64 will discuss all submitted comments over the following months and make final
decisions before BS7671:2018 published, expected to be July 2018.
is
What does this mean for me? It’s worth understanding how the BS7671 process works – even now, while you’re studying. Getting your head around the process now should make your career a great deal more informed. In addition, there are significant changes being proposed in the DPC, including a whole new section on energy efficiency. Sign up to Wiring Matters magazine to keep updated with news about proposals and changes: http://electrical.theiet.org /wiring-matters/index.cfm Wiring Matters will be running several articles on the DPC in the July issue, and has been covering the DPC, the committee work and other related news in recent posts. Visit theiet.org
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SPARKS MAGAZINE | AUTUMN ISSUE 2017 | SPONSORED FEATURE
SETTING THE STANDARD Matthew Quelch, an External Quality Assurer with EAL, the specialist awarding organisation for industry, highlights the benefits of qualifications. There has been much talk about changes in the education system with the introduction of new apprenticeship standards and the need or otherwise for the inclusion of qualifications. Employers in electrical and plumbing trades want to see tangible evidence that someone is job-ready – that’s why they value qualifications. For those looking to enter these trades, a pre-employment qualification is a great way to demonstrate commitment to their career path – giving employers further confidence that taking them on will be a worthwhile investment.
With future industry skills in high demand, EAL's technical qualifications have been designed to inspire and encourage young people to choose careers in engineering, electrical installation and plumbing.
They are an ideal solution for schools, colleges and training providers wanting to offer learners a fully recognised, technical qualification as well as seamless progression to current relevant apprenticeships.
The EAL Level 2 Intermediate Diploma in Electrical Installation (qualification number 601/4561/4) is predominantly for 16-19 year old learners in full time education. It has been designed in partnership with employers for learners to complete during the first year of a study programme, allowing them to progress to the UCAS accredited EAL Level 3 Advanced Diploma in Electrical Installation (qualification number 601/4563/8).
The qualification provides learners with practical experience of electrical installation and places them in situations they could face on the job.
Using a combination of practical workshops and theory sessions, assessment includes externally set and marked examinations, centre marked assignments / practical tests, and a final assessment.
Work experience is encouraged and employers should be involved in delivery and / or assessment of the qualification to help enrich the learning experience and provide a clear line of sight to work. As with all EAL qualifications, the criteria is regularly reviewed and refreshed to make sure it is up to date with current industry needs. It is a qualification which is growing in popularity and trusted by those working in the trade.
To find out more about EAL’s electrical qualifications go to eal.org.uk
Partners in Education
Commencing in September 2017, we have introduced our Partners in Education program, which has real tangible benefits for both students and college’s alike. By providing access to our technical expertise, training and our products, we are ensuring that our Electricians of tomorrow are off to the best possible start. For more information on our Partners in Education program, contact our Technical Service Centre on 01952 675689.
38
SPARKS MAGAZINE | AUTUMN ISSUE 2017 | EXERCISE
Magnetism & Electromagnetism Covering Unit 309 Outcome 5 ‘Understand the Fundamental Principles Which Underpin the Relationship Between Magnetism and Electricity’ (Level 3 NVQ Diploma in Installing ElectroTechnical Systems and Equipment 2357-13 / 91 and EAL unit QELTK3 / 008 Outcome 5).
A basic knowledge of magnetism and electromagnetism is an essential requirement for understanding electrical machines such as generators and motors. The following revision exercise should help you.
Q1. Complete the following statement:
In magnetism, LIKE POLES
and UNLIKE POLES
.
Q2. Show the magnetic lines and resulting force between each of the following permanent magnet poles.
a)
N
N
b)
N
S
Q3. Indicate the direction of magnetic field around the following current carrying conductors.
a)
b)
Current flowing into conductor
Current flowing out of the conductor
Q4. State the rule that is associated with magnetic fields surrounding current carrying conductors. ANSWER:
Q5. If a current carrying conductor is placed at 90º to
Q6. If a conductor is passed through a magnetic field in
a magnetic field what is the effect on the conductor?
N
S
the direction shown by the arrow what is the effect on the conductor?
N
S
Q7. What is the effect on the conductor in question 6 if it is moved upwards through the magnetic field? ANSWER:
Q8. State the HAND RULE that can be used to determine (i) the direction of FORCE or (ii) the direction of CURRENT FLOW in a
conductor when interacting with a magnetic field.
i)
ii)
Go to sparks-magazine.co.uk to download exercise answers for free
EXERCISE | AUTUMN ISSUE 2017 | SPARKS MAGAZINE
Electric Cables 1 Covering Outcome 4 of Unit 304 ‘Understand the Principles for Selecting Cables and Circuit Protection Devices’ (Level 3 NVQ Diploma in Installing Electro-Technical Systems and Equipment 2357-13 / 91 and EAL unit QELTK / 004A Outcome 4).
GENERAL KNOWLEDGE QUESTIONS Complete the following statements regarding cables.
Q1. An electric cable is designed to Q2. A typical electric cable will have a solid or stranded
and a protective layer called the
Q3. Cable insulation is generally a PVC layer that may be over-covered with an additional layer called the Q4. Insulating materials used in cable manufacture can be magnesium oxide, paper, plastic or in the case of bare conductors,
the surrounding
Q5. The current rating of an electric cable depends on the method of installation and the cable Q6. The cross-sectional-area of an electric cable is normally expressed in
and refers to the area of the
and not the whole cable.
Q7. Complete the labels for the following cable samples...
Q8. Composite cables can be clipped direct to a surface and consist of two or more cores. One example of a composite cable is
Q9. The abbreviation BASEC is the registered mark for the Q10. What is the function of the BASEC mark found on electric cables?
Go to sparks-magazine.co.uk to freely download exercise answers
39
40
SPARKS MAGAZINE | AUTUMN ISSUE 2017 | EXERCISE
Electric Cables 2 Covering Outcome 4 of Unit 304 ‘Understand the Principles for Selecting Cables and Circuit Protection Devices’ (Level 3 NVQ Diploma in Installing Electro-Technical Systems and Equipment 2357-13 / 91 and EAL unit QELTK / 004A Outcome 4). BS7671:2008 +3 2015 On-Site Guide for the Requirements for Electrical Installations The IET On-Site Guide provides guidance regarding cable installation including bends, clipping distances and calculation data for selecting the correct size cable containment. BENDS IN CABLES: (APPENDIX D) Q1. Complete the IET On-Site Guide: Table D5 (extract). The table shows the minimum INTERNAL RADII of bends in cables for fixed wiring.
INSULATION Thermosetting or thermoplastic (pvc) (circular, or circular stranded copper or aluminium conductors)
FINISH
OVERALL DIAMETER*
Non-armoured
Factor to be applied to overall diameter of cable to determine minimum internal radius of bend
Not exceeding
3 (2)†
Exceeding 10mm but not exceeding
4 (3)†
Exceeding 25mm
NOTE: * For flat cables the diameter refers to the major axis, i.e. the widest part of the cable † The figure in brackets relates to single-core circular conductors of stranded construction installed in conduit, ducting or trunking.
SUPPORTS FOR CABLES IN ACCESSIBLE POSITIONS: (APPENDIX D) Q2. Complete the IET On-Site Guide: Table D1 (extract). MAXIMUM SPACING OF CLIPS NON-ARMOURED THERMOSETTING OR THERMOPLASTIC SHEATHED CABLES OVERALL DIAMETER OF CABLE* (MM)
GENERALLY
Horizontal (mm) Not exceeding 9
250
Exceeding 9 and not exceeding 15 Exceeding 15 but not exceeding 20 Exceeding 20 but not exceeding 40
Vertical (mm)
400 350 550
Go to sparks-magazine.co.uk to download exercise answers for free CONTINUED ON PAGE 42
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42
SPARKS MAGAZINE | AUTUMN ISSUE 2017 | EXERCISE
CABLE CAPACITIES OF CONDUIT AND TRUNKING: (APPENDIX E) Thermosetting cables to be installed in the same trunking or conduit as thermoplastic insulated cables require the conductor operating temperature of any of the cables NOT TO EXCEED that stated for the thermoplastic insulated cables. Q3. What is the difference between thermosetting and thermoplastic PVC insulation?
APPENDIX E CONCERNS CABLE CAPACITIES FOR THREE SPECIFIC CASES: i) Straight runs of conduit not exceeding 3m in length. ii) Straight runs of conduit exceeding 3m in length, or in runs of any length with bends or sets. iii) Trunking.
Q4. Find and state the cable factors for each of the following cable types and installation methods:
i) 2.5mm2 PVC insulated cable with solid conductors installed in a short straight length of galvanised steel conduit.
ii) 10mm2 PVC insulated cables with stranded conductors installed in a 2m length of galvanised steel conduit.
iii) 10mm2 PVC insulated cables with stranded conductors installed in a 4m length of galvanised steel conduit.
Q5. Determine a suitable size of conduit to accommodate the following cables in a 2.8m straight run of steel conduit:
3 x 1.5mm2 (solid conductors)
3 x 4.0mm2
1 x 10.0mm2
2 x 16.0mm2
Go to sparks-magazine.co.uk to download exercise answers for free
EXERCISE | AUTUMN ISSUE 2017 | SPARKS MAGAZINE
Q6. Determine the number of 10mm2 cables that can be installed in a short straight run of less than 3m of 25mm dia. conduit.
The next questions concern cables installed in a steel conduit that is 5M in length with one 90º BEND and TWO OFF-SETS. NOTE: one off-set is equivalent to one bend. Q7. Determine a suitable size of conduit to accommodate the following sized cables:
2 x 1.5mm2 (solid conductors) 1 x 10.0mm2 (stranded conductors)
2 x 4.0mm2 (solid conductors) 1 x 16.0mm2 (stranded conductors)
Q8. Determine the number of 16mm2 conductors with thermosetting insulation that can be installed in a 50mm x 50mm
galvanised steel trunking.
Q9. What is the minimum inner bend radius for a 25mm conduit?
Go to sparks-magazine.co.uk to download exercise answers for free
43
44
SPARKS MAGAZINE | AUTUMN ISSUE 2017 | EXERCISE
Cable Supports Covering Outcome 3 of Unit 304 ‘Understand the Principles for Selecting Cables and Circuit Protection Devices’ (Level 3 NVQ Diploma in Installing Electro-Technical Systems and Equipment 2357-13 / 91 and EAL unit QELTK / 004A Outcome 4)
Q1: Complete the following table.
TYPE OF CABLE
METHOD OF INSTALLATION
PRECAUTIONS WHEN INSTALLING OR IN USE
Non-sheathed
Sheathed
Armoured
Flexible
Metal sheathed
Go to sparks-magazine.co.uk to download exercise answers for free
EXERCISE | AUTUMN ISSUE 2017 | SPARKS MAGAZINE
Q2: Complete the following table of cable clip spacings.
CABLE
HORIZONTAL SPACING
VERTICAL SPACING
NON-ARMOURED SHEATHED
Diameter: 1cm
FLAT TWIN & EARTH 9mm
18mm
PVC SWA 25MM DIA. 45°
Cable
MICC 9.5MM DIA.
Go to sparks-magazine.co.uk to download exercise answers for free
45
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SPARKS MAGAZINE | AUTUMN ISSUE 2017 | EXERCISE
Steel Containment Systems Covering Outcome 4 of Unit 304 ‘Understand the Types, Applications and Limitations of Wiring Systems and Associated Equipment.’ (Level 3 NVQ Diploma in Installing ElectroTechnical Systems and Equipment 2357-13 / 91 and EAL unit QELTK / 004 Outcome 4).
Identify the CORRECT NAME for each of the following steel cable containment systems and suggest ONE APPLICATION.
STEEL CABLE CONTAINMENT SYSTEM
NAME
APPLICATION
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EXERCISE | AUTUMN ISSUE 2017 | SPARKS MAGAZINE
Practice Multiple-Choice Questions for Wiring Containment Covering Outcome 4 of Unit 304 ‘Understand the Types, Applications and Limitations of Wiring Systems and Associated Equipment’ (Level 3 NVQ Diploma in Installing Electro-Technical Systems and Equipment 2357-13 / 91, and EAL unit QELTK3 / 04). Q1
20mm, 25mm and 32mm are diameters of...
a
Standard power cables
b
Standard conduits
c
Ducting
d
MICC cables
Q2
Stainless steel, galvanised and enamel are surface finishes used on...
a
Conduit, trunking and cable tray
b
Conduit only
c
Trunking only
d
Cable tray only
Q3
The cable capacity rating for a conduit allows for...
a
Additional cables to be installed at a later date
b
Expansion of cables when in use
c
Sufficient cable temperature rise without damage
d
Circulating air space allowing cables to shed heat in use
Q4
Joints in trunking, cable tray or metal ducting will require...
a
Sufficient set-screws and nuts to secure the joint
b
The ends of the containment to be pushed together
c
Protective bonding straps across each joint
d
Labels to indicate the position of the joint
Q5
The accessory used to join lengths of metal conduit is a...
a
Connector
b
Screwed sleeve
c
Joiner
d
Coupler
Q6
The device used to prevent undue strain on cables in a vertically mounted trunking is a...
Ans.
Ans.
Ans.
Ans.
Q7
The best practice method for connecting fixed metal conduit to a motor terminal box is...
a
PVC SWA
b
PVC conduit
c
Direct connection of the conduit with the box
d
Flexible conduit
Q8
Which one of the following containment systems may be used to support fluorescent luminaires?
a
Trunking
b
Cable tray
c
Conduit
d
Ducting
Q9
Spacer-bar, distance and hospital, are all types of...
a
Conduit
b
Trunking support mechanisms
c
Saddle
d
Support bracket
Ans.
Ans.
Ans.
Which one of the following wiring systems
Q10 requires the introduction of fire barriers where
Ans.
it penetrates floors or ceilings?
Ans.
Ans.
a
Conduit 25mm and above
b
Trunking with an area of over 710mm²
c
Cable tray
d
Cable basket
Q11
Cable basket is designed to support all of the following cable types, except...
a
Single PVC insulated cables
b
PVC SWA
c
PVC insulated MICC
d
CAT 5 data cable
Q12 A running-coupler is sometimes used in...
a
Clamp
a
PVC conduit systems
b
Pin-rack
b
Trunking installations
c
Support block
c
Underground ducting
d
Off-set
d
Steel conduit installations
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Ans.
Ans.
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SPARKS MAGAZINE | AUTUMN ISSUE 2017 | EXERCISE
WORDSEARCH: Hand & Power Tools Try to locate the names listed below. Words may be left to right or top to bottom.
A T R A N S F O R M E R B H E H M D I O
L E V E L A P A N H E A D F Z A I R A S
C R E U I W Q U C A C D L P Y N A I C F
X M R L J F N V H A M M E R S D A L E T
G I C F P V F L I M H A A V U L E L F A
I N S X G M W H S L S N D T G A N I R P
K A T V Q P Q L E H A L L E N M C N E E
L L E G A L U C L E W G F V X P A G B M
W S S K N I F E V A K L E D I S S M S E
Q C U T T E R S R B O O T S F I T A G A
C R U N T R R S I N K V V W T I L C S S
R E S U N S T R I P P E R S F W A H J U
T W O E M R U U C R K S S P E N C I L R
H D N L E A N L O P J H E A G N U N O E
I R T S Y F D E I S L F R N G S T E L C
J I G S A W H R I T O O I N O N B A E M
N V Z M N T E O C H A R G E R Y I A B Y
M E N G O G G L E S S T G R I N D E R L
T R E K D B D E S P L I T P I N C U P E
H A C K S A W L E E C J N V I O Q N Z S
BOOTS
HACKSAW
PLIERS
CHARGER
HAMMER
RULER
CHISEL
HAND LAMP
SAW
CUTTERS
JIG SAW
SPANNER
DRILLING MACHINE
KNIFE
STRIPPERS
GLOVES
LEAD
TAPE MEASURE
GOGGLES
LEVEL
TERMINAL SCREWDRIVER
GRINDER
PENCIL
TRANSFORMER
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EXERCISE | AUTUMN ISSUE 2017 | SPARKS MAGAZINE
Practice Multiple-Choice Questions for Hand & Power Tools Covering Unit 305 ‘Understand the Procedures for Selecting and Using Tools, Equipment…’ (Level 3 NVQ Diploma in Installing Electro-Technical Systems and Equipment 2357-13 / 91 and EAL unit QELTK3 / 04). Q1
Claw, ball-pein and sledge are all types of...
Ans.
Q7
A twist drill has which of the following features?
a
Masonry device
a
Plain shaft for securing in a chuck
b
Hammer
b
Conical tip
c
Screwdriver
c
Spiral flutes
d
Saw
d
All of the above
Q2
Flat, round, half-round and square are all types of...
a
File
b
Drill
c
Cutter
d
Hammer
Q3
Long-nose and combination are names associated with...
a
Hammers
b
Screwdrivers
c
Hacksaws
d
Pliers
Q4
A hand-tool marked IEC 60900 ‘VDE tested’ means that...
Ans.
Ans.
Q8
Which of the following safety equipment is essential when drilling holes in any material?
a
Neoprene gloves
b
Face mask
c
Safety helmet
d
Safety glasses or goggles
Q9
A tool suitable for cutting 20mm holes in metal trunking is...
a
A 21mm diameter twist drill
b
A 22mm metal punch
c
A 20mm hole-saw
d
A jig-saw
Ans.
The tool can be used at 1200V
b
The tool is insulated to a maximum of 1000V
c
a
Water-level
The tool is mechanically tested
d
b
Laser level
The tool is only suitable for live electrical working
c
5m tape measure
The recommended hacksaw blade that ensures at least 2-teeth in contact with metal at any time Ans. when cutting steel conduit or steel trunking, is...
d
Spirit level
Q11 A hammer with a split wooden handle should...
14 tpi
a
Not be used until the handle has been replaced
b
18 tpi
b
Be used with caution
c
24 tpi
c
Be taped up so as not to cause splinters
d
32 tpi
d
Be replaced with a metal handle
A vice that is hinged on one side and has ‘V’-shaped Ans. jaws is suitable for holding which of the following?
There is not a fixed spanner of the correct size available
Tubes, pipes and round bar
b
Tightening steel conduit lock-nuts
c
Timber planks
c
Tightening pvc conduit lock-nuts
d
Plastic trunking
d
Loosening steel nuts from bolts
Flat, square metal bar
b
Ans.
Ans.
Q12 An adjustable spanner should only be used when... Ans. a
a
Ans.
or around corners, is a...
a
Q6
Ans.
A suitable tool for obtaining levels across large
Q10 distances, between locations of different height
a
Q5
Ans.
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SPARKS MAGAZINE | AUTUMN ISSUE 2017 | HALL OF SHAME
HALL OF
While many electricians and electrical engineers are fully qualified and do a great job, there are still some people out there who do shocking work, and the results can be disastrous. Here’s some examples of what not to do! We teamed up with Voltimum and the ECA to showcase some of the biggest electrical tragedies around.
t (@NigelLecLtd)... Contractor commen e the consumer t in a cupboard abov Just found this beau lighting circuits would this be? See unit, what IP rating too. are wired in rubber Expert comment... had been tallation, if only this So nearly a good ins enclosure! fitted in a suitable 416.2.1
Contractor comment (Ra phael Magnus)... Here's one way to solve the water problem in the isolator. (How much silicon Gel?) The other way is to do it right, put a WP gland in the bottom, and leave an open drain hole, like you’re supposed to do with a proper rain loop on the cable. And people wonde r why they get unsatisfactor y EICR Reports. Expert comment... As you say, cer tainly one way to solve it. Though it would have been much better to do it right the first time. 512.1.5 • 512.2.1 • 51 2.2.2
Contractor comment... Found covered up underneath insulation with a bit of guttering over the top. Expert comment... Access to live parts, excessive heat build up, generally shoddy workmanship. It’s fortunate that these situations don’t appear more often. 134.1.1 • 416.1 • 416.2.1 • 421.1.1
HALL OF SHAME | AUTUMN ISSUE 2017 | SPARKS MAGAZINE
IN ASSOCIATION WITH
comment... m T/E lashed Contractor uit, with 1m rc ci l na s fi ng on a ri l the socket socket outlet supplying al , ng ge ga ra le ga ns e ng A si nectio wall into th fast too! Con through the dog’s break t gh ri ng a into it, going a ha as ch w d been vi in there, whi ose, and ha lo l al e er w and lighting plate . of the socket for a while.. in the back quiet smoke ted to this ere only aler w ) d an sb ion' e and her hu ving 'connect der (my niec to it was ha in ed gg The househol lu p evice d breaking. on 'Alexa' d as the Amaz er making an ow p e th h it issues...w ment... than right. Expert com do it wrong, to er rd ha is in. le of how it any squeezed azing examp e with that m os lo e Another am er w ns e terminatio .204 No wonder th 3.1 • 433.1 526.1 • 43
Contractor comment (@kva_nor IP rating anyone?
thwest)...
Expert comment... I would hope that it doesn’t get too much rain here. Seems that the plywood door wasn’t suitable for the job, which is a surprise. 512.1.5 • 512.2.1
If you’ve come across a nightmare installation, send your pictures to us and they could be featured on this page.
Email all photos to editor@sng-publishing.co.uk A big thank you to Voltimum and ECA for supplying us with the above photos. For further information, pop over to their websites. www.voltimum.co.uk | www.eca.co.uk
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SPARKS MAGAZINE | AUTUMN ISSUE 2017 | APP REVIEW
APP-RENTICE
Rag & bone, ringer, handset, mobile, bleeper, cell… whatever you call your phone, it’s unlikely that you’re ever without it. So why not use it to go further as an electrician? We take a look at some of the latest apps that are available to make all of that sparky malarkey just a little bit more straightforward…
A companion to the mySchneider Electrician portal, the free mySchneider Electrician app is designed to save electricians precious time through a suite of tools that make compiling a quote for a customer quick and professional. The app lets you enter key house details, such as the number of rooms, and assign a selection of Schneider Electric wiring devices and consumer units to each room for costing. Quotes can be shared directly with preferred distributors or users can export themselves in order to make quick modifications. It allows electricians to show them available product ranges and finishes, as well as initial budget projections. Users can also send stock availability requests direct to distributors. Visit http://www.schneider-electric.co.uk/en/ partners/electricians
Makita is one of the leading professional power tool manufacturers and to assist you throughout your working day there is the Makita app featuring: Quick Website Link Spirit Level Levelling Instrument Sound Level Meter Flash Light Distance Measure Battery Level Indicator (for your smartphone) The Makita app is free and contains no adverts. Download now from iTunes or Google Play www.makitauk.com/mobile-apps.html
P R O D U C T S & S E RV I C E S
PRODUCTS AND SERVICES | AUTUMN ISSUE 2017 | SPARKS MAGAZINE
GERMAN HAND TOOL SPECIALIST FELO INTRODUCE A NEW APPRENTICE TOOL KIT
If you would like the professional electricians of the future to know about your products or services, why not advertise in this section? It’s cost effective and your brand will reach over 11,000 electrical students throughout the UK.
Call 0870 774 3049 for details. sparks-magazine.co.uk
THE SOLID GEAR SAFETY SHOE PUTS A SPRING IN YOUR STEP Endless cushioning and comfort has until now been difficult to get in safety shoes, but with Solid Gear’s Revolution Infinity it really is possible, with a ‘bounce back’ mid-sole which gives a 55% ‘energy return’ that will reduce fatigue and stress on your back, legs and feet. The shoe’s stretchable upper with Cordura is water-resistant with amazing performance when it comes to breathability, fit and flexibility. It has a non-slip sole, composite midsole and heel counter for foot stability. They also come with Solid Gear’s newly developed NANO toe-cap. solidgearfootwear.com
The 10-piece kit comes with a free tool pouch. It contains five Ergonomic screw drivers with the most advanced handle design that adapts to the user’s hand. There’s also a pair of VDE pliers, a pair of cutters with inductionhardened cutting edges, a safety lanyard, a cable stripper and a mains testing screwdriver. All tools conform with the highest safety standards, are certified and individually tested with 10,000 volts according IEC 60900 and are Made in Germany. Email for your local distributors details. sales@pjwiseman.co.uk
THE NEW SNICKERS WORKWEAR CATALOGUE This 148-page catalogue has all you need to know about the world’s leading range of working clothes for professional tradesmen and women. This workwear will work hard on site all year round, whatever the working environment you’re in. The Catalogue includes Work Trousers, Work Jackets, Tool Vests Shirts, Underwear, Accessories and Tool Carriers – plus an extensive range of PPE Workwear. Complimented by Snickers Profiling and Embroidery services and the UK’s most extensive range of garment sizes, Snickers’ Workwear System delivers the ultimate solution to make every man and woman’s workday easier and safer. snickersworkwear.co.uk
FISCO TOOLS’ NEW ‘A1-PLUS’ HI-VIS TAPES
THE ALL NEW “MHS” HOLESAWS FROM M K MORSE
With an EC Class II measuring accuracy, these new Hi-Vis Tapes are stamped with the Fisco brand hallmarks of quality and reliability. With a tough ABS case that has a high-impact rubber overmould, these tapes combine hardwearing reliability with ease of use. There are 3 different models, available in 5 and 8 metre lengths with 19mm and 25mm blade width variants. With a handy belt clip, a self-zeroing end-hook and a ‘positive action’ brake, these ‘A1-Plus’ Hi-Vis Tapes from Fisco will satisfy most general measuring tasks on site.
Made in the USA with a 49mm cutting depth as standard, this premium quality holesaw has an M42 High Speed Steel cutting edge with 8 % Cobalt to give a faster cut with longer life. A key feature is the patent-pending tooth design, which combined with the New Side Slots gives easier slug ejection. 70 sizes are available with a range of Arbors to cover every application. A handy Electrician’s Kit is available with the popular sizes in 22mm/29mm/35mm/44mm/51mm/64mm. The MA34 and MA45P arbors come in a heavy duty case. Email for your local distributors details.
hultafors.co.uk
sales@pjwiseman.co.uk
Email press releases to editor@sng-publishing.co.uk if you would like your product or service featured in this section
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