Significant Changes to the Philippine Electrical Code 2009 Edition
Jaime V. Mendoza, MTM Board Member
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PEC – 2009 (8th Edition) BEE Resolution No. 12 Series of 2009 – Adoption of the Revised (8th Edition) Philippine Electrical Code Part I as Part of the Rules and Regulations Concerning the Practice of Electrical Engineering and as Referral Code in Accordance with the National Building Code – Sept. 14, 2009. Published in the Philippine Star last February 18, 2010 (Thursday) page B-10 BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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R. A. 7920 An Act For, A More Responsive and Comprehensive Regulation For the Practice, Licensing, and Registration of Electrical Engineers and Electricians. Sec. 4 Powers and Duties of the Board ¾ The Board shall exercise executive /administrative or quasi-legislative (rulemaking) or quasi-judicial (investigative) powers in carrying out the provisions of this Act.
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Powers of the Board ‰ Sec. 29. Revocation of Certificates of Registration and Suspension from the Practice of the Profession. ƒ The Board shall have the power, upon proper notice and hearing, to revoke any certificate of registration of any registrant, to suspend him from the practice of the profession or to reprimand him for any specified in the preceding section, or for the use of perpetration of any fraud or deceit in obtaining a certificate of registration, or for gross negligence or incompetence or for unprofessional or dishonorable conduct, for violation of this Act, the rules and regulations and other policies of the Board and the Code of Professional Ethics.
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Licensing Definition – a permission granted by competent authority to engage in a practice of profession or business or in an activity. A PEE who designed, signed, and sealed an electrical plans – means he/she guaranteed the safety of the electrical plans for 15 years in accordance to Civil Code. PEE, REE or RME who signed as in-charge of installations also guaranteed the safety of the electrical installations for 15 years. You can only guaranteed the safety of your electrical designs/installations if you are well-versed in the Philippine Electrical Code. “Licensing guarantees the safety of your works!!!!” BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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THE PHILIPPINE ELECTRICAL CODE KEY TO SAFETY AND FIRE PREVENTION PURPOSE OF PEC The primary objective of the code is to establish basic materials quality and electrical works standards for the safe use of electricity for light, heat, power, communications, signaling and for other purposes. “Practical safeguarding of persons and property from hazards arising from the use of electricity” COMPLIANCE TO THE PEC WILL ENSURE SAFETY AND PREVENT ELECTRICAL FIRES BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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The Philippine Grid/Distribution Codes Performance Standards
The Philippine Electrical Code Safety Standards • Design and Specifications • Installation • Operation & Maintenance
• Power Quality • Reliability • System Loss
GRID/DISTRIBUTION DEVELOPMENT PLANNING CRITERIA BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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THE PHILIPPINE ELECTRICAL CODE The PEC is a safety standard, not a design guide. Electrical designs must comply with the requirements of PEC to ensure safety. Energy management, maintenance, and power quality issues aren’t within the scope of the PEC. Consideration should be given for future expansion of electrical systems but this is not a Code requirement. BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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Philippine Electrical Code ‰ Enforcement 1. This Code is intended for mandatory application by government bodies exercising legal jurisdiction over electrical installation. 2. These government bodies will have the responsibility of implementing the provision of this Code in deciding on the approval of equipment and materials and for granting the special permission contemplated in this Code, where it assured that equivalent objectives can be achieved by establishing and maintaining effective safety.
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Philippine Electrical Code ‰ Interpretation Upon recommendation of the Code Committee, the Board of Electrical Engineering shall render the final decision in the interpretation of any portion of the Philippine Electrical Code, in case of controversy.
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The National Electrical Code The first documented case of a Code as a requirement of rules was published on 16th Nov. 1881 entitled “The Dangers of Electric Lighting”. The first NEC was developed in 1897, eighteen after the invention of incandescent light bulb by Thomas A. Edison. Since 1911, the NFPA of Quincy, Massachussets, has been responsible for the maintenance and publication of the NEC. Regularly revised (every three years) to reflect the evolution of products, materials, and installation techniques. 21 Separate Committee, each consisting of 15-20 persons. Members of each committee meet several times, discuss proposed changes, accepting some and rejecting others, and rewrite (as required) the sections of the Code that were assigned to their committee. BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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THE PHILIPPINE ELECTRICAL CODE
Code Arrangement BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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THE PHILIPPINE ELECTRICAL CODE
CLASSIFICATION OF CODE RULES 1. Wiring Design Rules 2. Installation Rules 3. Manufacturing Rules BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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THE PHILIPPINE ELECTRICAL CODE CLASSIFICATION OF CODE RULES Wiring design rules used to determine sizes and rating of circuit conductors and devices. Example: 1. Branch circuit conductors supplying a single motor shall have an ampacity not less than 125% of the full-load current. Section 4.30.2.2 2. The disconnecting means for motor circuits shall have an ampere rating of at least 115% of the full-load current rating of the motor. Section 4.30.10.10(a) BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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THE PHILIPPINE ELECTRICAL CODE CLASSIFICATION OF CODE RULES Installation rules Example: 1. A disconnecting means shall be located within sight from the motor controller. Section 4.30.102 2. In class II Division I Locations, motors, generators, and other rotating electric machinery shall be dust ignition proof or totally enclosed pipe ventilated and shall be approved for class II locations. Sections 5.02.8 BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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THE PHILIPPINE ELECTRICAL CODE CLASSIFICATION OF CODE RULES Manufacturing rules Example: Section 4.30.1.7 A motor shall information:
be
marked
with
the
following
1) Manufacturer’s Name 2) Rated Volts and Full-load Amperes 3) Rated Frequency and Number of Phases, if an alternating current motor, etc. 4) Rated full-load speed BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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The Philippine Electrical Code
Various Categories of the Code Rules which apply in a Motor and the Circuits BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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ELECTRICAL FIRES If a fault develops, the current (and heat energy) can increase to the extent that either the appliance burns out, the connecting wiring overheats and melts the plastic insulation or the plug and socket may burn out. An electrical fire then occur where the overheated wiring, motor, plug, etc. are in contact with or close to flammable or combustible material.
ELECTRICAL FIRE can be defined as a fire where an electric current or electrical fault is found to have been the source of ignition.
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Components that Create a Fire or Explosion
combustion
Triangle of Fire
Very Significant on PEC Installation Rules!!! BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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Significant Changes to the Philippine Electrical Code 2009 Edition Regularly revised (every three years) to reflect the evolution of products, materials, and installation techniques. 21 Separate Committee, each consisting of 15-20 persons. Members of each committee meet several times, discuss proposed changes, accepting some and rejecting others, and rewrite (as required) the sections of the Code that were assigned to their committee.
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Change Type in the PEC 2009 1. New 2. Revision 3. Relocated 4. Reorganization 5. Universal Change 6. Deletion (310.5)
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New - Definitions AHJ – Authority Having Jurisdiction Bonding Jumper, System Coordination (Selective) Electrical Practitioner, Licensed Electrical Practitioner, Non-Licensed Guest Rooms Guest Suite Handhole Enclosure BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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Guest Room
An accommodation combining living, sleeping, sanitary and storage facilities. BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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Guest Suite
An accommodation with two or more contiguous rooms comprising a compartment, with or without doors between such rooms, that provides living, sleeping, sanitary, and storage facilities. BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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New Provision ‰ PEC 2.10.1.5 (c) Identification for Branch Circuits, page 69 ‰ (c) Ungrounded Conductors Where the premises wiring system has branch circuits supplied from more than one nominal voltage system, each ungrounded conductor of a branch circuit, where accessible shall be identified by system. The means of identification shall be permitted to be by separate color coding, marking tape, tagging, or other approved means and shall be permanently posted at each branch-circuit panelboard or similar branch-circuit distribution equipment. BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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PEC 2.10.1.5 (c) – Identification for Branch Circuit for Ungrounded Conductors
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New Provision 2.10.1.8(b)(2) –GFCI Protection Other than Dwelling Commercial and institutional kitchens – for the purposes of this section, a kitchen is an area with a sink and permanent facilities for food preparation and cooking. (Culinary Schools)
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New Provision 2.10.1.8(b)(4) –GFCI Protection Other than Dwelling Outdoor in Public Spaces – for the purpose of this section a public space is defined as any space that is for use by, or is accessible to the public.
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New Provision 2.10.1.8(b)(5) –GFCI Protection Other than Dwelling (5)Outdoor , where installed to comply with 2.10.3.14 Heating, Airconditioning, and Refrigeration Outlet
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New Provision 2.10.1.8(c)Boat Hoists ƒ GFCP for personnel shall be provided for outlets that supply boat hoists installed in dwelling unit locations
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2.10.1.8 GFCI Protection for Personnel b) Other than Dwelling Units 1) Bathrooms* 2) Commercial and institutional kitchens 3) Rooftops* 4) Outdoors in public spaces 5) Outdoors, where installed to comply with 2.10.3.14
* Including in PEC 2000
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GFCI Protection for Personnel PEC-2.10.1.8 (a) a) Dwelling Units 1. Bathrooms 2. Garages 3. Outdoors 4. Crawl spaces at or below grade level 5. Unfinished basements 6. Kitchens for countertop appliances 7. Wet bar sinks 8. Boathouses (New Provision) BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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New Provision 2.10.1.12.Arc-Fault Circuit Interrupter Protection (b) Dwelling Unit Bedrooms – All single phase, 15 and 20 A branch circuits supplying outlets installed in dwelling unit bedrooms shall be protected by a listed AFCI. Combination type installed to provide protection of the branch circuit. BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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Arc-Fault Circuit Interrupter
An AFCI is a device intended to open the circuit when it detects the current waveform characteristics that are unique to an arcing fault. BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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AFCI
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Ground Fault Circuit Interrupter
A GFCI is designed to protect persons against electric shock. It operates on the principles of monitoring the unbalanced current Between the ungrounded and the grounded neutral conductor. BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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New Provision
p88 BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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Revised - Definition Dwelling Unit – one or more rooms for the use of one or more persons as a housekeeping unit with space for eating, living, sleeping, and permanent provisions for cooking and sanitation. PEC 2000 Dwelling Unit – a single unit, providing complete and independent living facilities for one or more persons, including permanent provisions for living, sleeping, cooking, and sanitation. (PEC 2009) BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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Revised - Definition 2.10.1.8(a)(8)
GCFI Protection
Laundry, utility, and wet bar sinks – where the receptacles are installed to serve the countertop surfaces and are located within 1.8 m (6 ft) of the outside edge of the sink. Laundry, utility, and wet bar sinks – where the receptacles are installed within 1.8 m (6 ft) of the outside edge of the sink. BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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GFCI Protection for Personnel 7. Dwelling Wet Bar Sinks
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Revised - Definition Garage – a building or portion of a building in which one or more self-propelled vehicles carrying volatile flammable liquid, for fuel or power are kept for use, sale, storage, rental, repair, exhibition, or demonstrating purposes, and all that portion of a building that is on or below the floor or floors in which such vehicles are kept and that is not separated there from by suitable cutoffs. Garage – A building or portion of a building in which one or more self-propelled vehicles can be kept for use, sale, storage, rental, repair, exhibition, or demonstration purposes. BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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Relocated -Definition Solidly Grounded – PEC 2000 Grounded, Solidly – PEC 2009
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2.1.1.6(b) Means of Identying Grounded Conductors PEC-2000 (b) Sizes Larger than 14 mm2. An insulated rounded conductor larger than 14 mm2 shall be identified either by a continuous white or natural gray outer finish or by three continuous white stripes on other than green insulation along its entire length or at the time of installation by a distinctive white marking at its terminations. This marking shall encircle the conductor or insulation. BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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2.1.1.6(b) Means of Identying Grounded Conductors PEC-2009 ‰ Sizes Larger Than 14 mm2. An insulated conductor larger than 14 mm2 shall be identified by one of the following means: 1) By a continuous white or gray cover finish. 2) By three continuous white stripes along its entire length on its entire length on other than green insulation 3) At the time of installation, by a distinctive white or gray marking at its terminations. This marking shall encircle the conductor or insulation. BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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Section 2.0.1.6 (a)
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2.1.1.6(d) Means of Identifying Grounded Conductors PEC-2000 (d) Grounded Conductors of Different Systems. Where conductors of different systems are installed in the same raceway, cable, box, auxiliary gutter, or other type of enclosure, one system grounded conductor, if required, shall have an outer covering conforming to Section 2.1.1.6(a) or (b). Each other system grounded conductor shall have an outer covering of white with a readily distinguishable different colored stripe (not green) running along the insulation, or other and different means of identification as allowed by Section 2.1.1.6(a) or (b) that will distinguish each system grounded conductor. BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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2.1.1.6(d) Means of Identifying Grounded Conductors PEC-2009 (d) Grounded Conductors of Different Systems. Where grounded conductors of different systems are installed in the same raceway, cable, box, auxiliary gutter, or other type of enclosure, each grounded conductor shall be identified by system. Identification that distinguishes each system grounded conductor shall be permitted by one of the following means: (1) One system grounded conductor shall have an outer covering conforming to 2.0.1.6(a) or 2.0.1.6(b). (2) The grounded conductor(s) of other systems shall have a different outer covering conforming to 2.0.1.6(a) or 2.0.1.6(b) or by an outer covering of white or gray with a readily distinguishable colored stripe other than green running along the insulation. (3) Other and different means of identification as allowed by 2.0.1.6(a) or 2.0.1.6(b) that will distinguish each system grounded conductor. This means of identification shall be permanently posted at each branch-circuit panelboard. BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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An Example of Conductor Color Coding
Phase A
120/240 – V, Single Phase Black
208Y/120 – 480Y/277V, ThreeV, ThreePhase Phase Black Brown
Phase B
Red
Red
Orange
Blue
Yellow
White with red Stripe
Gray
Phase C Neutral
White
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Section 2.0.1.6 (d) (1)
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Mixing Grounded Neutral Conductors Different System Sec. 2.0.1.6(d)(2)
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Section 2.0.1.7(c)
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Branch Circuits A. Tamper-Resistant Receptacles in Dwellings Unit (406.11) (NEC-2008) Why do you think it is a tamperresistant receptacle?
…..To increase safety for children.
…..maybe that your son, daughter, or grandchildren that you will save…
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Branch Circuits A. Tamper-Resistant Receptacles in Dwellings Unit (406.11) (NEC-2008)
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Reorganization – Article 2.20 Branch-Circuit, Feeder, and Service Calculations 2000 Article 2.20 Part
2009 Article 2.20 Sections
Part
Sections
I. General
2.20.1.1- 4
I. General
2.20.1.1 -5
II. Feeders and Services
2.20.2.1 - 14
II. Branch Circuit 2.20.2.1 - 7 Load Calculations
III. Optional 2.20.3.1 - 7 Calculations for Computing Feeder and Service Loads
III. Feeder and Service Load Calculations
2.20.3.1 - 23
IV. Method for 2.20.4.1 - 2 Computing Farm Loads
IV. Optional Feeder2.20.4.1 - 9 And Service Load Calculations V. Farm Calculation 2.20.5.1- 4
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Universal Change A universal change throughout the 2009 PEC is the replacement of “computed load” and “demand load” with “calculated load.” For example, the term demand load is being replaced with calculated load to improve clarity and to reduce confusion, especially when related to “calculated load” and “demand factor.” The term calculated load includes demand factor, the concepts of diversity, and historical data. BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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2.30.6 Service Equipment – Disconnecting Means a) Location a) Readily Accessible Location. The service disconnecting means shall be installed at a readily accessible location of a building or a structure. For a building, the service disconnecting means shall be installed either at the outside wall or inside nearest point of entrance of the service conductors to the building.
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2.30.6 Service Equipment – Disconnecting Means a) Location 2) Bathrooms. Service disconnecting means shall NOT be installed in bathrooms.
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Article 2.50 Grounding and Bonding The title of Article 2.50 has been changed from “Grounding” to “Grounding and Bonding.” Change Significance: The scope of the article clearly covers both grounding and bonding. Adding the term bonding to the title of the article is appropriate, and is consistent with the fact that there are generally as many bonding requirements and provisions included within Article 2.50 as there are grounding requirements, if not more.
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2.50.1.2 Definitions (Revision) ‰ Effective Ground-Fault Current Path – An intentionally constructed, permanent, low impedance electrically conductive path designed and intended to carry current under ground-fault conditions from the point of a ground fault on a wiring system to the electrical supply source and that facilitates the operation of the overcurrent protective device or groundfault detectors on high-impedance grounded systems. BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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Effective Ground-Fault Current Path
Metal parts of premises wiring are bonded to an effective ground-fault current path that has sufficiently low impedance to quickly clear line-to-case faults by opening the circuit protection device. BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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Effective Ground-Fault Current Path
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Effective Ground-Fault Current Path
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Earth is Not an Effective GroundFault Current Path
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2.50.1.2 Definitions ‰ Ground Fault- An unintentionally, electrically conducting connection between an ungrounded conductor of an electrical circuit and the normally non-current-carrying conductors, metallic enclosures, metallic raceways, metallic, or earth.
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2.50.1.2 Definitions ‰ Ground-Fault Current Path- An electrically conductive path from the point of ground fault on a wiring system through normally noncurrent-carrying conductors, equipment, or the earth to the electrical supply source. BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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Article 2.50 2.50.2.5(b) Main Bonding Jumper 2.50.2.11 Grounding Separately Derived Alternating-Current Systems 2.50.2.13 Buildings or Structures Supplied by Feeder(s) or Branch Circuit(s) 2.50.3 Grounding Electrode System and Grounding Electrode Conductor 2.50.10 Grounding of Systems and Circuits of 1 kV and Over (High Voltage) BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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3.10.1.4 Conductors in Parallel The paralleled conductors in each phase, polarity, neutral, or grounded circuit conductor shall comply with all the following: 1. Be the same length 2. Have the same conductor material 3. Be the same size in circular mil area 4. Have the same insulation type 5. Be terminated in the same manner. Why?????? …….. See FPN: BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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3.10.1.5 Minimum Size of Conductors The minimum size of conductors shall be as shown in Table 3.10.1.5, except as permitted elsewhere in this Code. Removal of 10 previous exceptions were not needed
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3.10.1.6 Shielding In this section’s exception, the voltage has been reduced from 8 kV to 2.4 kV for use of unshielded conductors. Cables operated at a voltage higher than 2.4 kV will now be required to be shielded. Many cable manufacturers specifically recommend against the use of nonshielded cable above 2 kV because of arcing problems and cables without shielding have a very high failure rate. BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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3.10.1.8 Locations d) Locations Exposed to Direct Sunlight. Insulated conductors and cables used where exposed to direct rays of the sun shall comply with one of the following: (be of a type listed for sunlight resistance or listed and marked “sunlight resistant”) 1) Cables listed, or listed and marked , as being sunlight resistant 2) Conductors listed, or listed and marked , as being sunlight resistant 3) Covered with insulating material, such as tape or sleeving, that is listed and marked ,as being sunlight resistant.” BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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3.10.1.10 Temperature Limitation of Conductors ย The PEC 2009 has added a new Fine Print Note with information on derating for conduits on rooftops that have direct sunlight exposures; 17ยบC is the indicated value to be added to the outdoor ambient temperature to compensate for the direct solar gain.
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3.10.1.15(b)(2) Adjustment Factors ‰ A new last sentence has been added to 3.10.15(b)(2)(a) to require that individual conductors of paralleled sets be counted as current-carrying conductor. This is intended to clarify varying interpretations of whether each conductor of a paralleled set of conductors is required to be counted individually or if all of the conductors count as one for the purpose of derating. Clearly, each conductor of the parallel set is required to be counted individually for the purposes of rating. BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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Configuration
All conductors in single conduit
Conductor if Neutral is Counted
Derating Percentage
Conductors if Neutral is Not Counted
12
9
4
3
All conductors in metal wireway or auxiliary gutter
12
9
All conductors in nonmetallic wireway or auxiliary gutter
12
9
4 conductors in 3 conduits or cables
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Derating Percentage
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Table 3.10.1.15(b)(2)(a) Adjustment Factors for More than Three CurrentCarrying Conductors in a Raceway or Cable
Number of CurrentCarrying Conductors
Percent of Values in Tables 3.10.1.16 Through 3.10.1.19 as Adjusted for Ambient Temperature if Necessary
4–6 7–9 10 – 20 21 – 30 31 – 40 41 and above
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80 70 50 45 40 35
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Configuration
All conductors in single conduit 4 conductors in 3 conduits or cables
Conductor if Neutral is Counted
12
Derating Percentage
Conductors if Neutral is Not Counted
Derating Percentage
50
9
70 Not
4
80
3
Not
required Not
All conductors in metal wireway or auxiliary gutter
12
required
9
required
All conductors in nonmetallic wireway or auxiliary gutter
12
50
9
70
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Section 3.10.1.15(b)(4) (4) Neutral Conductor. a) A neutral conductor that carries only the unbalanced current from other conductors of the same circuit shall not be required to be counted when applying the provisions of Section3.10.1.15(b)(2)(a). b) In a 3-wire circuit consisting of two phase wires and the neutral of a 4-wire, 3-phase wye-connected system, a common conductor carries approximately the same current as the lineto-neutral load currents of the other conductors and shall be counted when applying the provisions of Section 3.10.1.15(b)(2)(a). c) On a 4-wire, 3-phase wye circuit where the major portion of the load consists of nonlinear loads, harmonic currents are present in the neutral conductor; the neutral shall therefore be considered a current-carrying conductor.
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Notes ‰ For metal auxiliary gutters, 3.66.2.14(a) indicates that derating is not required so long as the number of current-carrying conductors at any cross section does not exceed 30. A similar statement is included for sheet metal wireways in 3.76.2.13. ‰ Derating for the number of current-carrying conductors in non-metallic auxiliary gutters and wireways is required, beginning at four-current carrying conductors, because conductors in nonmetallic enclosures do not dissipate heat as well as those in sheet-metal enclosures. BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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Introduction ‰ Art. 6.95 contains many requirements to keep that supply of water uninterrupted. For example: 1. Locating the pump so as to minimize its exposure to fire. 2. Ensuring that the fire pump and its jockey pump have a reliable source of power. 3. It makes sense to keep fire pump wiring independent. BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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Introduction ‰ Other requirements seem wrong at first glance, until you remember why the fire pump is there in the first place. For example: 1. The disconnect must be lockable in the closed position. 2. Fire pumps power circuits cannot have automatic protection against overload.
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Introduction ¾ “ It’s better to run the fire pump until its winding melt, than to save the fire pump and lose the facility”
¾ And the intent of Article 6.95 is to save the facility.
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6.95.1.1 Scope a) Covered 1) Electric power sources and interconnecting circuits 2) Switching and control equipment dedicated to fir pump drivers b) Not Covered 1) The performance, maintenance, and acceptance testing of the fire pump system, and the internal wiring of the components of the system 2) Pressure maintenance (jockey or makeup) pumps BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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6.95.1.3 Power Sources for Electric-Motor Driven Fire Pumps a) Individual Source 1) Electric Utility Service. A separate service from a connection located ahead of but not within the service disconnecting means. 2) On-Site Power. An on-site power supply, such as generator, located and protected to minimize damage by fire is permitted to supply a fire pump.
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6.95.1.3 Power Sources for Electric-Motor Driven Fire Pumps
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6.95.1.3 Power Sources for Electric-Motor Driven Fire Pumps
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6.95.1.3 Power Sources for Electric-Motor Driven Fire Pumps
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6.95.1.3 Power Sources for Electric-Motor Driven Fire Pumps b) Multiple Sources 1) Generator Capacity. Shall have sufficient capacity to allow normal starting and running 0f the motor(s) driving the fire pump(s) while supplying other simultaneously operated load. 2) Feeder Sources. 3) Arrangement. The power sources shall be arranged so that a fire at one will not cause an interruption at the other source. BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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6.95.1.3 Power Sources for Electric-Motor Driven Fire Pumps
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6.95.1.5 Transformers ‰ Dedicated transformer and overcurrent protection sizing can be broken down into three requirements. 1. The transformer must be size to at least 125% of the sum of the loads. 2. The transformer primary overcurrent device must be at least a specified minimum size. 3. The transformer secondary must not contain any overcurrent device whatsoever.
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6.95.1.5 Transformers
The overcurrent device in the primary of a transformer supplying a fire pump installation. The device is required to be sized to carry the locked-rotor current motor(s) and associated fire pump accessory equipment indefinitely. BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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6.95.1.6 Power Wiring a) Service and Feeder Conductors. Supply conductors must be physically routed outside buildings and must be installed in accordance with Article 2.30. Where supply conductors cannot be routed outside buildings, they must be encased in 2 inches or 50 mm of concrete or brick.
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6.95.1.6 Power Wiring b) Circuit Conductors. Fire pump supply conductors on the load side of the final disconnecting means and overcurrent device(s) must be kept entirely independent of all other wiring. They can be routed through a building using one of the following methods: 1) Be encased in a minimum 2 inches or 50 mm of concrete 2) Be within an enclosed construction dedicated to the fire pump circuit(s) and having a minimum of a 1-hour fire-resistant rating 3) Be listed electrical circuit protective system with a minimum 1-hour fire rating. BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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6.95.1.6(c)(2) BC Conductor Size Fire Pump Motor Branch Circuit Conductor Size From Table 4.30.14.5(b)
Branch circuit conductors to a single fire pump motor must have a rating not less than 125% of the motor FLC as listed in Table 4.30.14.2 or 4.30.14.4 BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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6.95.1.7 Voltage Drop
The voltage drop at the line terminals of the controller when the motor starts (locked-rotor current), must not drop more than 15% below the controller’s rated voltage. BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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6.95.1.7 Voltage Drop Fire Pump Conductor Size – Voltage Drop
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6.80 Swimming Pools, Fountains, and Similar Installations Article 6.80 - applies to decorative pools and fountains; swimming, wading, and wave pools; therapeutic tubs and tanks; hot tubs; spas; hydromassage bathtubs; and similar installation including pools used in religious services where participants are immersed in water. The installations covered by this article can be indoors or outdoors, permanent or storable, and may or may not be directly supplied by electrical circuits of any nature. BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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6.80.1.2 Definitions
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6.80.1.2 Definitions
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6.80.1.3 Other Articles
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6.80.1.8 Overhead Conductor Clearance
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6.80.1.8 Overhead Conductor Clearance
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6.80.1.12 Maintenance Disconnecting Means
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6.80.2 Permanently Installed Pools
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6.80.2 Permanently Installed Pools
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6.80.2.3(a)(4) Restricted Space
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6.80.2.3(a)(5) GFCI Protection
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6.80.2.3(a)(5) GFCI Protection
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6.80.2.3(a)(5) GFCI Protection
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4.11.1.4(b) Lighting Systems Operating at 30 V or less
10 ft = 3 m
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6.80.2.3(b) Luminaires
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6.80.2.4(a)(4) Underwater Luminaires
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6.80.2.4(f) Branch-Circuit Wiring
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6.80.2.7 Equipotential Bonding
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6.80.2.7 Equipotential Bonding
Bonding of conductive metal parts in a swimming pool. BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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6.80.4.2 Emergency Switch for Spas and Hot tubs
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6.80.4.4 Indoor Installations of Spas and Hot Tubs
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6.80.4.5 GFCI Protection
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6.80.5 Fountains
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6.80.7 Hydromassage bathtubs
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6.82 Natural and Artificially Made Bodies of Water –(New Article)
An artificially made of body of water. The electrical equipment associated with pumps used to circulate water in this artificial pond is subject to the requirements of Article 6.82. BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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Definitions Artificially Made of Bodies of Water – Bodies of water that have been constructed or modified to fit some decorative or commercial purpose such as, but not limited to, aeration ponds, fish farm ponds, storm retention basins, treatment ponds, irrigation (channel) facilities. Water depths may vary seasonally or be controlled. Natural Bodies of Water – Bodies of water such as lakes, streams, ponds, river, and other naturally occuring bodies of water, which may vary in depth throughout the year. BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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Thank You !!!! &
GOOD Morning! BOARD OF ELECTRICAL ENGINEERING PROFESSIONAL REGULATION COMMISSION
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