AGENDA. NEC Code-Making Panel 13. Report on Proposal Meeting. January 16-20, Hilton Head, SC

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1 National Fire Protection Association 1 Batterymarch Park, Quincy, MA Phone: Fax: AGENDA NEC Code-Making Panel 13 Report on Proposal Meeting January 16-20, 2010 Hilton Head, SC Item No. Subject Call to Order Introduction of Members and Guests Review of Meeting Procedures and Revision Schedule Comments/Questions from Committee Members and/or Guests Task Group Reports (if any) Processing of Proposals Fire Protection Research Foundation Requests Old Business New Business Adjournment

2 Chair Report 11/25/2011 Log Proposal No. Code Reference Log Proposal No. Code Reference 1170l 13-1 Entire Document (E) 921l 13-2 Entire Document (F) (New) Battery System (New) and Emergency Systems Nominal Battery Voltage Phase Converter (New) Sealed Cell or Battery Solar Photovoltaic System Storage Battery (New) (New) Exception (New) (New) (New) 3302a xx (New) xx (New) xx (New) , Informational Note Cell (New) Container (New) Electrolyte (New) Intercell Connector Interior Connector Nominal Battery Voltage Terminal (New) and (A) and (B) (New) (C) (A), Informational Note (C) (C), Informational Note (C)(1) and (2) (New) (D) (New) (D) (X) (New) (New) (C) (New) Fire Pump - Sprinkler On-Site Standby (A)(1) (A)(1) (C)(1) (B)(2)(a) (B)(2) (B)(2) (B)(2)(a) (B)(3)(a) (B)(3)(b) (B)(3) (New) (B) (C)(2) (C)(2) (A)(2)(d)(1) (B) (D) (D) (D) (D) (D) and (E) (D) and (E) (D) (D) and (E) (D) (E) (I) (J)(5) (New) (A) (B) (G) (E) (F) (F)(1) (G)

3 Chair Report 11/25/2011 Log Proposal No. Code Reference Log Proposal No. Code Reference Luminaire, Directly and (B) Emergency Systems Emergency Systems (F) (A) and (B) (C) (E), 701.5(D), and (B) (New) (B)(5) (B)(5)(b) (D)(1) (B) (B)(5) (B)(5) (D) (D) (D) (D) Exception (New) (D)(1) (B)(6), (B)(5), 550a (B)(6), (B)(5) and (D) (D)(1) (F) (F) (F) Exception No (F)(4) Exception No (New) (New) (D)(1)(5) Legally Required Legally Required (C) (B) (C) (New) (D) (E) , Part V (New) Optional Standby Optional Standby (B) (B)(2)(a) (B) (C) (New) (A) and (B) (C) (New) (New) (New) Category I Critical Operations Supervisory Control and (A) (A)(1) (C) (C)(1) (C)(1) (C)(1) (C)(1) (C)(1)(3) (C)(1)(3) (C)(2) (C)(2)(3) (A) (7) (F)(5) (B) (D)

4 Chair Report 11/25/2011 Log Proposal No. Code Reference Log Proposal No. Code Reference Exception (New) Exception (New) Article 710 (New) (New) Annex F Annex J- (New) Annex J (New) 3

5 13-1 Log #1170l NEC-P13 Russell LeBlanc, The Peterson School In articles 90 through 830, if the wording is not already there, then add the words (or other structure(s)) after the word BUILDING(S) wherever the intent of the requirement is to also include STRUCTURES as well as buildings. There is a flaw in the NEC. The term "building" is used over 1000 times in the NEC, and in most of the cases the words "or other structure" should follow and apply the same requirements to bridges, billboards, towers, tanks, and other structures that are by definition NOT BUILDINGS. One specific example I can use is section Wiring on Buildings. I believe that this section is also intended to be applied structures, but the wording "or other structures" is not in the heading or the paragraph. There are literally thousands of other instances throughout the code that this same problem exists. This can easily be seen by doing an electronic search for the word "building". In some cases the words "or other structure" (or similar wording) are present, but in the vast majority where the requirements should also be applied to structures other than buildings, the wording is not there Log #921l NEC-P13 Joe Tedesco, Boston, MA The term "adequate" and "adequately" and "inadequately" and "inadequate" should be replaced with terms that can be properly enforced and understood. Terms are not defined and are considered vague and unenforceable per Table in the NEC Style Manaual. They are all "incorrect" 148 times in the NEC Log #1606 NEC-P13 James F. Williams, Fairmont, WV Interconnected battery subsystems consisting of one or more storage batteries and battery chargers, and can include inverters, converters, and associated electrical equipment. Interconnected battery subsystems consisting of one or more storage batteries and battery chargers, and can include inverters, converters, and associated electrical equipment. The defined term is referenced in several articles of the NEC:,,, (4),,,,,,,,,,, & In general, Article 100 shall contain definitions of terms that appear in two or more other articles of the. 1

6 13-4 Log #1613 NEC-P13 James F. Williams, Fairmont, WV Those systems legally required and classed as emergency by municipal, state, federal, or other codes, or by any governmental agency having jurisdiction. These systems are intended to automatically supply illumination, power, or both, to designated areas and equipment in the event of failure of the normal supply or in the event of accident to elements of a system intended to supply, distribute, and control power and illumination essential for safety to human life. Informational Note: Emergency systems are generally installed in places of assembly where artificial illumination is required for safe exiting and for panic control in buildings subject to occupancy by large numbers of persons, such as hotels, theaters, sports arenas, health care facilities, and similar institutions. Emergency systems may also provide power for such functions as ventilation where essential to maintain life, fire detection and alarm systems, elevators, fire pumps, public safety communications systems, industrial processes where current interruption would produce serious life safety or health hazards, and similar functions. Those systems legally required and classed as emergency by municipal, state, federal, or other codes, or by any governmental agency having jurisdiction. These systems are intended to automatically supply illumination, power, or both, to designated areas and equipment in the event of failure of the normal supply or in the event of accident to elements of a system intended to supply, distribute, and control power and illumination essential for safety to human life. Informational Note: Emergency systems are generally installed in places of assembly where artificial illumination is required for safe exiting and for panic control in buildings subject to occupancy by large numbers of persons, such as hotels, theaters, sports arenas, health care facilities, and similar institutions. Emergency systems may also provide power for such functions as ventilation where essential to maintain life, fire detection and alarm systems, elevators, fire pumps, public safety communications systems, industrial processes where current interruption would produce serious life safety or health hazards, and similar functions. The defined term is referenced in several articles of the NEC: (A)(3), 230.2(A)(2), (B), T240.3, Critical Branch, Emergency System, Life Safety Branch, , (A), (A)<exc3>, (A), (A)<exc2>, (B)(1)(2), (B)(1), (B)(2), (B)(4), (C)(1), F517.30<info1>, (C)(3), (C)(1)(4), (E), , , , , <info>, 518.3(C), 520.8, (C), (B)(1), (1), 700.2, 700, 701.2, T705.3, 708.1<info4>. The NEC Style Manual: Article 100. In general, Article 100 shall containdefinitions of terms that appear in two or more other articles of the NEC Log #1605 NEC-P13 James F. Williams, Fairmont, WV The voltage of a battery based on the number and type of cells in the battery. Informational Note: The most common nominal cell voltages are 2 volts per cell for the lead-acid systems, 1.2 volts per cell for alkali systems, and 4 volts per cell for Li-ion systems. Nominal voltages might vary with different chemistries. The voltage of a battery based on the number and type of cells in the battery. Informational Note: The most common nominal cell voltages are 2 volts per cell for the lead-acid systems, 1.2 volts per cell for alkali systems, and 4 volts per cell for Li-ion systems. Nominal voltages might vary with different chemistries. The defined term is referenced in several articles of the NEC:,,, & In general, Article 100 shall contain definitions of terms that appear in two or more other articles of the. 2

7 13-6 Log #1604 NEC-P13 James F. Williams, Fairmont, WV An electrical device that converts single-phase power to 3-phase electric power. Informational Note: Phase converters have characteristics that modify the starting torque and locked-rotor current of motors served, and consideration is required in selecting a phase converter for a specific load. An electrical device that converts single-phase power to 3-phase electric power. Informational Note: Phase converters have characteristics that modify the starting torque and locked-rotor current of motors served, and consideration is required in selecting a phase converter for a specific load. The defined term is referenced in several articles of the NEC:,,,,,. In general, Article 100 shall contain definitions of terms that appear in two or more other articles of the Log #1608 NEC-P13 James F. Williams, Fairmont, WV A cell or battery that has no provision for the routine addition of water or electrolyte or for external measurement of electrolyte specific gravity and might contain pressure relief venting. A cell or battery that has no provision for the routine addition of water or electrolyte or for external measurement of electrolyte specific gravity and might contain pressure relief venting. The defined term is referenced in several articles of the NEC:,,,,, & In general, Article 100 shall contain definitions of terms that appear in two or more other articles of the Log #3035 NEC-P13 D. Jerry Flaherty, Electrical Inspection Service, Inc. The total components and sub-system that, in combination, convert solar energy into electric energy suitable for connection to a utilization load. Clarification and consistency. Article 690 is very changeling to read and understand. Using different terms to identify the same thing makes this article more difficult. Using only one term for identification the photovoltaic system will enable the reader to better absorb the requirements of this article rather than trying to figure out what the different terms mean. The term Photovoltaic System is used 16 times in article 690 while the term Solar Photovoltaic System is used only 5 times. Article 690 is titled Solar Photovoltaic (PV) Systems making it obvious the all discussion in the article refers to Solar. The word Photovoltaic is use hundreds of times in Article 690. Reducing the term to PV, like is done with ac and dc, would also lead to better comprehension of Article

8 13-9 Log #1607 NEC-P13 James F. Williams, Fairmont, WV A battery comprised of one or more rechargeable cells of the lead-acid, nickel-cadmium, or other rechargeable electrochemical types. A battery comprised of one or more rechargeable cells of the lead-acid, nickel-cadmium, or other rechargeable electrochemical types. The defined term is referenced in several articles of the NEC:, (7), (5), (3), (2), (4),,,,,,,,, (1), (1),,,,,,,,,,,, ),,,,, ),,,,, (3)(2),, &, & &. In general, Article 100 shall contain definitions of terms that appear in two or more other articles of the Log #2682 NEC-P13 Donald R. Cook, Shelby County, AL Dept of Development Services Add new text to read as follows: Each generator shall be provided with a nameplate giving the manufacturer s name, the rated frequency, power factor, number of phases if of alternating current, the subtransient and transient impedances, the rating in kilowatts or kilovolt amperes, the normal volts and amperes corresponding to the rating, rated revolutions per minute, insulation system class and rated ambient temperature or rated temperature rise, and time rating. Where the neutral point of a generator is bonded to the generator frame, marking to indicate where that connection is made shall be provided. NEC Article 250 allows generator installation to be provided as separately derived systems or not. Installers, AHJ s, and users must be able to determine if the neutral point of the generator is bonded to the frame to select transfer equipment and wiring requirements. Marking on the generator will facilitate that selection. 4

9 13-11 Log #2932 NEC-P13 Raymond J. Stanko, Underwriters Laboratories, Inc. Each generator shall be provided with a nameplate giving the manufacturer s name, the rated frequency, power factor, number of phases if of alternating current, the subtransient and transient impedances, the rating in kilowatts or kilovolt amperes, the normal volts and amperes corresponding to the rating, rated revolutions per minute, insulation system class and rated ambient temperature or rated temperature rise, and time rating.nameplates for all stationary generators and portable generators rated more than 15 kw, shall also give the power factor, the subtransient and transient impedances, rated revolutions per minute, insulation system class, and time rating. Portable generators rated 15 kw or less are not permanently connected to a structure in the same way stationary generators are installed. These small portable generators are used in various applications where all of the presently required nameplate information is not relevant due to the simple use powering temporary loads. Information regarding the subtransient and transient impedances, rated revolutions per minute, insulation system class and time rating do not provide meaningful information to users about the proper use of these small generator products Log #2643 NEC-P13 John R. Kovacik, Underwriters Laboratories Inc. Constant-voltage generators, except ac generator exciters, shall be protected from overload and short circuit by inherent design, circuit breakers, fuses, protective relays, or other identified overcurrent protective means suitable for the conditions of use. Wiring and devices between the constant voltage generator and the first overcurrent protective device that provides short circuit protection shall also be protected from short circuit. Section is titled overcurrent protection. Overcurrent protection typically includes short circuit protection in addition to overload protection. The proposal offers clarification for overcurrent protection of a generator to include short circuit protection Log #1158 NEC-P13 Neil A. Czarnecki, Reliance Controls Corporation Where field-installed wiring wires pass passes through an opening on an enclosure, conduit box, or barrier, a bushing shall be used to protect the conductors from the edges of openings having sharp edges. Despite the fact that 90.1(C) clearly states that the Code is not intended as a design specification, authorities having jurisdiction continue to apply sections of the Code intended only for field-installed wiring to factory-installed wiring as well. There are many varied methods for protecting factory-installed wiring that may pass through internal barriers within an enclosure that are perfectly safe and acceptable to Qualified Electrical Testing Laboratories. This change will clearly indicate to the AHJ that the busing requirement applies only to field-installed wiring. 5

10 13-14 Log #425 NEC-P13 Joel A. Rencsok, Scottsdale, AZ Add new text to read as follows: Generator terminal housings shall comply with 430.l2. Where a horsepower rating is required to determine the required minimum size of the generator terminal housing, the full-load current of the generator shall be compared with comparable motors in Table through Table The higher horsepower rating of Table and Table shall be used whenever the generator selection is between two ratings. Table only applies to generators rated less than 600 volts. The sizes shown are too small for 15 kv conductors. See Article 430 Part XI for over 600 volts Log #502 NEC-P13 Joel A. Rencsok, Scottsdale, AZ Generator terminal housings shall comply with Where a horsepower rating is required to determine the required minimum size of the generator terminal housing, the full-load current of the generator shall be compared with comparable motors in Table through table The higher horsepower rating of Table and Table shall be used whenever the generator selection is between two ratings. Table only apples to generators rated less than 600 volts. The sizes shown are to small for 15 kv conductors. See article 430 Part XI for over 600 volts Log #480 NEC-P13 Edward G. Kroth, Verona, WI Generators shall be equipped with disconnecting means capable of being locked disconnect(s), lockable in the open position, by means of which...(the remainder to stay unchanged). This is a companion proposal to a proposal to Code-Making Panel 1. The idea of the latter proposal is to standardize the phrase "disconnecting means capable of being locked". The proposal herein should only be accepted if the proposal to Code-Making Panel 1 or some similar version is accepted. 6

11 13-17 Log #501 NEC-P13 Joel A. Rencsok, Scottsdale, AZ A single generator supplying more than one load, or multiple generators operating in parallel, shall be permitted to supply either of the following: (1) A vertical metal-enclosed switchgear and switchboard with separate sections (2) Individual enclosures with overcurrent protection tapped from a single feeder for load separation and distribution if a generator(s) is provided with overcurrent protection meeting the requirements of (A). It appears that metal-enclosed switchgear was inadvertently left out when this was included in the NEC. See also Article 100 definitions. See also Part VIII Section for additional requirements. Switchboards by definition are not intended to be enclosed. See definition. Article 490 Part VII does not include installation requirements Log #2461 NEC-P13 Gary L. Olson, Cummins Power Generation Add text to read as follows: Where multiple generators are operated in parallel, the common bus between the generator sets shall be considered as the source of power for the distribution system. As emergency-standby power systems have grown larger, often encompassing all the loads in critical facilities, it has become more common to parallel generator sets in the system. This results in a number of challenges in the system design, especially considering that many of the NEC requirements have been developed with the understanding that the main disconnecting device is the largest device in the system and fed from a utility service. It is not uncommon for the breakers protecting a generator and providing the paralleling switch function are much smaller than the downstream feeders providing power to the balance of the system. For example, a system with four 1250kW generator sets operating at 480 VAC would commonly use 2000 amp breakers for the paralleling function, but would often require use of 4000A feeder breakers. In many applications this would technically require the 4000 amp feeder to coordinate with the upstream 2000 amp breaker, which is not possible..note: Supporting material is available for review at NFPA Headquarters. 7

12 13-19 Log #3364 NEC-P13 James T. Dollard, Jr., IBEW Local 98 Add new text to read as follows: All 125-volt, single-phase, , and 30-ampere receptacle outlets, that are a part of a 15 kw or smaller, portable generator, shall have ground-fault circuit interrupter protection for personnel integral to the generator or receptacle. The proposed text and substantiation is essentially the same as proposal during the 2011 Code cycle. That proposal achieved consensus during the ROP, but deliberations during the ROC, and the resulting vote (which was 9 Affirmative, 9 Negative ), resulted in the TCC directing the vote to be recorded as a Reject, noting that consensus was lost during the ROC. The companion proposal (3-139) did get accepted by CMP 3, and was adopted into Section This issue needs to be revisited by CMP-13. Small portable generators, sized at 15 kw or smaller, are used for many different purposes, such as power on camping trips; on construction sites for temporary power for electrical equipment, such as table saws, pressure washers, and hand-held tools as well as lighting and similar purposes; for temporary connection of electrical circuits in a home or for small commercial buildings; and for power during emergency situations for all different types of installations due to natural disasters. In all of these applications, there are many potential hazards associated with these temporary installations, such as cut and abraded wire and cable, standing water and wet locations, and similar hazardous applications. During power outages from storms and other natural disasters, persons who may not be familiar with adequate safety procedures often use these generators to supply power in less than optimal conditions. Requiring all 125-volt, single phase, 15-, 20-, and 30-ampere on 15 kw or smaller generators to be integrally GFCI protected will help eliminate the possibilities of shock hazards from damaged circuits, damaged equipment, or use of equipment in wet locations. This new section will ensure that portable generators will have adequate personnel protection for these receptacles wherever these generators are used. By limiting GFCI protection to only 15-, 20-, and 30-ampere, single phase, 120 volt circuits, these small generators can still be used for supplying standby power for non-gfci protected 20-ampere, 30-ampere, and larger 120/240 single phase, 3-wire with ground as well as 3-phase circuits of all sizes for houses and small commercial buildings. Providing the proper transfer switch or transfer method with the proper compliance with the requirements in Article 250 for separately derived systems or non-separately derived systems is the responsibility of the installer of the system. 8

13 13-20 Log #3302a NEC-P13 Elliot Rappaport, Coconut Creek, FL Replace the phrase equipment grounding conductor with the phrase equipment bonding conductor in the Articles and Sections as identified below. Replacement of grounding or ground when used separately is covered in separate proposals This proposal is one of a series of proposals to replace, throughout the Code, the term grounding with bonding where appropriate. As used in the Code, grounding is a well defined term and refers to connecting to the earth or ground for any one of a number of reasons. Similarly, bonding is the connection of two bodies together to form a continuous electrical path. The term equipment grounding conductor has a definite purpose that is not uniquely expressed in the term. As a result, there is a misconception that grounding will make a system safe. On the contrary, connecting equipment to ground without providing the bonding connection back to the source can make the equipment less safe. The purpose of the equipment grounding conductor (EGC) is to provide a low impedance path from a fault at equipment likely to become energized to the source of the electrical current (transformer, generator, etc,). If it is argued that the purpose is to connect the equipment to ground, then the requirement of 250.4(A)(5) that the earth shall not be considered as an effective ground fault path would no longer be valid because fault current would then be intended to flow to the ground (earth). From the conductor sizing requirements of , and specifically (B), it is apparent that the purpose of the EGC is related to connection (bonding) to the source of power rather than connection to ground. If the principle purpose was the connection to ground, then the sizing requirements would be less important since near equipotential conditions can be achieved with much smaller conductors. The fundamentals of these proposals are to clearly state that systems are grounded and equipment is bonded. The fact that the bonding conductor may be grounded also is secondary to the primary function of bonding. This proposal proposes changing the word grounding to bonding, where appropriate, throughout the Code. It is clear that there are many places where grounding is used to identify the connection to earth (grounding electrode conductor) and grounding should remain. Additionally, the expression EGC should be changed to EBC, equipment bonding conductor for consistency. 9

14 13-21 Log #2996 NEC-P13 Stephen McCluer, APC by Schneider Electric / Rep. IEEE Stationary Battery Committee Add new text to read as follows: (A) Battery overcurrent protection devices shall be permitted in accordance with (H) - in some applications, batteries (typically under 60 volts) may be permitted to be installed without an overcurrent protection device. (B) Battery overcurrent protection devices shall be listed for the dc application IEEE 1375 provides guidance for battery circuit protection. (A) Battery overcurrent protection is already addressed in (H) of the Code. This citation ensures that the appropriate section is not overlooked. The informational note clarifies that an OCPD is permitted but not required. Some critical applications (notably telecommunications) do not use an OCPD. (B) This requirement ensures that if an ac device (e.g., circuit breaker) is used with a battery, it must be listed for the application. Usually the dc rating is lower than the ac rating for the same device. The Informational Note directs the reader to the applicable standard for battery circuit protection. This proposal tentatively falls into the section as 480.4, but it probably needs a new section or paragraph number. The existing addresses overcurrent protection only when a battery is used for prime movers; it would not apply to batteries used as stored energy for emergency power systems, uninterruptible power systems, or telecommunications systems. This proposal was developed as a joint effort of the NEC DC Task Force of the Technical Correlating Committee and the IEEE Stationary Battery Codes Working Group. The DC Task Force is chaired by John R. Kovacik / Underwriters Laboratories, and the IEEE Codes Working Group is chaired by Steve McCluer / Schneider-Electric. This proposal is the collaborative effort of battery manufacturers, users, integrators, installers, engineers and other battery stakeholders. The battery sub-task group members are Phyllis Archer / C&D ; Curtis Ashton / Century Link; Matt Balmer / Mitsubishi; Allen Byrne / Interstate Batteries; Bill Cantor / TPI Engineering; Terry Chapman / SCE; Troy Chatwin / GE; Allen Fowler / Eaton; Dan Lambert/ APC; Linda Little / IBEW; Robert Lord / Analex; Ron Marts / Telcordia; Stephen McCluer / Schneider Electric; Dan McMenamin / DNM Assoc.; Mark Ode / UL; John Polenz / Emerson; Rob Wills / Intergrid. 10

15 13-22 Log #3007 NEC-P13 Stephen McCluer, APC by Schneider Electric / Rep. IEEE Stationary Battery Committee Add new text to read as follows: used. When mating dissimilar metals, antioxidant material suitable for the battery connection shall be Ampacity of field-assembled intercell and intertier connectors and conductors shall be of such cross-sectional area that the temperature rise under maximum load conditions and at maximum ambient shall not exceed the safe operating temperature of the conductor insulation or the material of the conductor supports. Conductors sized to prevent a voltage drop exceeding 3% of maximum anticipated load, and where the maximum total voltage drop to the furthest point of connection does not exceed 5%, will provide reasonable operation, but may not be appropriate for all battery applications. IEEE Std 1375 provides guidance for overcurrent protection and associated cable sizing. Electrical connections to the battery, and cable(s) between cells on separate levels or racks, shall not put mechanical strain the battery terminals. Terminal plates shall be used where practicable. (A) Antioxidant material is the standard method of minimizing current imbalance, corrosion and increased resistance in a connection that could cause excessive heat or fire when dissimilar metals are used in battery terminations. Some substances used for battery connections, as well as for cleaning batteries, are inappropriate because they can degrade and/or damage the battery case material. The informational note alerts the reader that battery container materials can be compromised with certain chemicals, so any chemical used on a battery must be acceptable to the manufacturer. (B) The language of this text parallels the text used in (B). Because of the wide variety of battery types, configurations, applications, and battery runtimes, prescriptive requirements are not feasible. The language in the informational note (B) parallels existing language in 215.2(A)(4), informational note #2, but as it applied specifically to a battery installation. (C) Terminal plates offer three advantages when cabling a battery. (1) Terminal plates offer more width in which to 'land' lugs from multiple cables enabling reduced cabling resistance losses between the battery and the load. (2) By moving the lugs a bit further from the battery post, the corrosive effects of leaking seals is less likely to degrade electrical connections. In the case of lead-acid cells, a lug tends to be more vulnerable to sulfur attack than does a properly installed terminal plate. (3) The weight or tension of cable connections can potentially damage the terminals of a battery unit, depending upon the battery type and construction. Terminal plates allow the landing of one or more conductors, but not all battery designs can accommodate terminal plates. If accepted, this proposal would add new paragraphs, possibly under (Wiring & Equipment Supplied From Batteries), or as a new numbered section, probably following and renumbering subsequent paragraphs. This proposal was developed as a joint effort of the NEC DC Task Force of the Technical Correlating Committee and the IEEE Stationary Battery Codes Working Group. The DC Task Force is chaired by John R. Kovacik / Underwriters Laboratories, and the IEEE Codes Working Group is chaired by Steve McCluer / Schneider-Electric. This proposal is the collaborative effort of battery manufacturers, users, integrators, installers, engineers and other battery stakeholders. The battery sub-task group members are Phyllis Archer / C&D ; Curtis Ashton / Century Link; Matt Balmer / Mitsubishi; Allen Byrne / Interstate Batteries; Bill Cantor / TPI Engineering; Terry Chapman / SCE; Troy Chatwin / GE; Allen Fowler / Eaton; Dan Lambert/ APC; Linda Little / IBEW; Robert Lord / Analex; Ron Marts / Telcordia; Stephen McCluer / Schneider Electric; Dan McMenamin / DNM Assoc.; Mark Ode / UL; John Polenz / Emerson; Rob Wills / Intergrid. 11

16 13-23 Log #3008 NEC-P13 Stephen McCluer, APC by Schneider Electric / Rep. IEEE Stationary Battery Committee Add new text to read as follows: used. When mating dissimilar metals, antioxidant material suitable for the battery connection shall be Consult the battery manufacturer s guidance for acceptable materials. Ampacity of field-assembled intercell and intertier connectors and conductors shall be of such cross-sectional area that the temperature rise under maximum load conditions and at maximum ambient shall not exceed the safe operating temperature of the conductor insulation or the material of the conductor supports. Conductors sized to prevent a voltage drop exceeding 3% of maximum anticipated load, and where the maximum total voltage drop to the furthest point of connection does not exceed 5%, will provide reasonable operation, but may not be appropriate for all battery applications. IEEE Std 1375 provides guidance for overcurrent protection and associated cable sizing. Electrical connections to the battery, and cable(s) between cells on separate levels or racks, shall not put mechanical strain the battery terminals. Terminal plates shall be used where practicable. (A) Some substances used for battery connections, as well as for cleaning batteries, are inappropriate because they can degrade and/or damage the battery case material. The informational note recommends to find out from the battery manufacturer what compounds are suitable. (B) The language of this text parallels the text used in (B). Because of the wide variety of battery types, configurations, applications, and battery runtimes, prescriptive requirements are not feasible. The language in the informational note (B) parallels existing language in 215.2(A)(4), informational note #2, but as it applied specifically to a battery installation. (C) The weight or tension of cable connections can potentially damage the terminals of a battery unit, depending upon the battery type and construction. Terminal plates allow the landing of one or more conductors, but not all battery designs can accommodate terminal plates. If accepted, this proposal would add new paragraphs, possibly under (Wiring & Equipment Supplied From Batteries), or as a new numbered section, probably following and renumbering subsequent paragraphs. This proposal was developed as a joint effort of the NEC DC Task Force of the Technical Correlating Committee and the IEEE Stationary Battery Codes Working Group. The DC Task Force is chaired by John R. Kovacik / Underwriters Laboratories, and the IEEE Codes Working Group is chaired by Steve McCluer / Schneider-Electric. This proposal is the collaborative effort of battery manufacturers, users, integrators, installers, engineers and other battery stakeholders. The battery sub-task group members are Phyllis Archer / C&D ; Curtis Ashton / Century Link; Matt Balmer / Mitsubishi; Allen Byrne / Interstate Batteries; Bill Cantor / TPI Engineering; Terry Chapman / SCE; Troy Chatwin / GE; Allen Fowler / Eaton; Dan Lambert/ APC; Linda Little / IBEW; Robert Lord / Analex; Ron Marts / Telcordia; Stephen McCluer / Schneider Electric; Dan McMenamin / DNM Assoc.; Mark Ode / UL; John Polenz / Emerson; Rob Wills / Intergrid. 12

17 13-24 Log #3009 NEC-P13 Stephen McCluer, APC by Schneider Electric / Rep. IEEE Stationary Battery Committee Add text to read as follows: The following standards are frequently referenced for the installation of stationary batteries (1) IEEE Std. 484, 2008 (2) IEEE 485,, 1997 (3) IEEE 1145,, 2007 (4) IEEE Std 1187,, 2002 (5) IEEE 1375,, 1996 (R2003) (6) IEEE , 2007 (7) IEEE 1635/ASHRAE 21 (TBD) (8) IEEE , 2009 Some of these installation standards were referenced in NPFA 70 E and were removed because they were outside the scope of NFPA 70E and because installation requirements belong in NFPA 70. Additional references are included for battery technologies other than lead-acid, monitoring, spill containment, and technician qualifications. This proposal was developed as a joint effort of the NEC DC Task Force of the Technical Correlating Committee and the IEEE Stationary Battery Codes Working Group. The DC Task Force is chaired by John R. Kovacik / Underwriters Laboratories, and the IEEE Codes Working Group is chaired by Steve McCluer / Schneider-Electric. This proposal is the collaborative effort of battery manufacturers, users, integrators, installers, engineers and other battery stakeholders. The battery sub-task group members are Phyllis Archer / C&D ; Curtis Ashton / Century Link; Matt Balmer / Mitsubishi; Allen Byrne / Interstate Batteries; Bill Cantor / TPI Engineering; Terry Chapman / SCE; Troy Chatwin / GE; Allen Fowler / Eaton; Dan Lambert/ APC; Linda Little / IBEW; Robert Lord / Analex; Ron Marts / Telcordia; Stephen McCluer / Schneider Electric; Dan McMenamin / DNM Assoc.; Mark Ode / UL; John Polenz / Emerson; Rob Wills / Intergrid Log #2241 NEC-P13 Laurie B. Florence, Underwriters Laboratories Inc. The voltage of a battery based on the number and type of cells in the battery. Informational Note: The most common nominal cell voltages are 2 volts per cell for the lead-acid systems, 1.2 volts per cell for alkali systems, and volts per cell for Li-ion systems. Nominal voltages might vary with different chemistries. Nominal voltages for lithium ion batteries vary between 3.6 Vdc to about 3.8 Vdc depending upon chemistry. A voltage of 4 Vdc would be too high and would be more typical of a charge voltage for this chemistry. 13

18 13-26 Log #2989 NEC-P13 Stephen McCluer, APC by Schneider Electric / Rep. IEEE Stationary Battery Committee Add new text to read as follows: The basic electrochemical unit, characterized by an anode and a cathode used to receive, store, and deliver electrical energy. The term cell is used and not defined. This definition correlates with a definition that was revised in NPFA 70E. This definition is needed in order to make the distinction between a battery and a cell. A consists of one or more. This definition is preferred by the IEEE Stationary Battery Committee. This proposal was developed as a joint effort of the NEC DC Task Force of the Technical Correlating Committee and the IEEE Stationary Battery Codes Working Group. The DC Task Force is chaired by John R. Kovacik / Underwriters Laboratories, and the IEEE Codes Working Group is chaired by Steve McCluer / Schneider-Electric. This proposal is the collaborative effort of battery manufacturers, users, integrators, installers, engineers and other battery stakeholders. The battery sub-task group members are Phyllis Archer / C&D ; Curtis Ashton / Century Link; Matt Balmer / Mitsubishi; Allen Byrne / Interstate Batteries; Bill Cantor / TPI Engineering; Terry Chapman / SCE; Troy Chatwin / GE; Allen Fowler / Eaton; Dan Lambert/ APC; Linda Little / IBEW; Robert Lord / Analex; Ron Marts / Telcordia; Stephen McCluer / Schneider Electric; Dan McMenamin / DNM Assoc.; Mark Ode / UL; John Polenz / Emerson; Rob Wills / Intergrid Log #2990 NEC-P13 Stephen McCluer, APC by Schneider Electric / Rep. IEEE Stationary Battery Committee Add new text to read as follows: A vessel that holds the plates, electrolyte, and other elements of a single unit in a battery. : A container is sometimes improperly referred to in the industry as a single-cell or multi-cell jar ; this term should not be used. This term is used in Article 480 and is not defined. This definition is preferred by the IEEE Stationary Battery Committee This proposal was developed as a joint effort of the NEC DC Task Force of the Technical Correlating Committee and the IEEE Stationary Battery Codes Working Group. The DC Task Force is chaired by John R. Kovacik / Underwriters Laboratories, and the IEEE Codes Working Group is chaired by Steve McCluer / Schneider-Electric. This proposal is the collaborative effort of battery manufacturers, users, integrators, installers, engineers and other battery stakeholders. The battery sub-task group members are Phyllis Archer / C&D ; Curtis Ashton / Century Link; Matt Balmer / Mitsubishi; Allen Byrne / Interstate Batteries; Bill Cantor / TPI Engineering; Terry Chapman / SCE; Troy Chatwin / GE; Allen Fowler / Eaton; Dan Lambert/ APC; Linda Little / IBEW; Robert Lord / Analex; Ron Marts / Telcordia; Stephen McCluer / Schneider Electric; Dan McMenamin / DNM Assoc.; Mark Ode / UL; John Polenz / Emerson; Rob Wills / Intergrid. 14

19 13-28 Log #2991 NEC-P13 Stephen McCluer, APC by Schneider Electric / Rep. IEEE Stationary Battery Committee Add new text to read as follows: Electrolyte: The medium that provides the ion transport mechanism between the positive and negative electrodes of a cell. The term electrolyte is used in other companion proposals for Article 480 and is not defined (see 480.XX Mechanical connections and Working clearance). This definition is preferred by the IEEE Stationary Battery Committee. This proposal was developed as a joint effort of the NEC DC Task Force of the Technical Correlating Committee and the IEEE Stationary Battery Codes Working Group. The DC Task Force is chaired by John R. Kovacik / Underwriters Laboratories, and the IEEE Codes Working Group is chaired by Steve McCluer / Schneider-Electric. This proposal is the collaborative effort of battery manufacturers, users, integrators, installers, engineers and other battery stakeholders. The battery sub-task group members are Phyllis Archer / C&D ; Curtis Ashton / Century Link; Matt Balmer / Mitsubishi; Allen Byrne / Interstate Batteries; Bill Cantor / TPI Engineering; Terry Chapman / SCE; Troy Chatwin / GE; Allen Fowler / Eaton; Dan Lambert/ APC; Linda Little / IBEW; Robert Lord / Analex; Ron Marts / Telcordia; Stephen McCluer / Schneider Electric; Dan McMenamin / DNM Assoc.; Mark Ode / UL; John Polenz / Emerson; Rob Wills / Intergrid Log #2992 NEC-P13 Stephen McCluer, APC by Schneider Electric / Rep. IEEE Stationary Battery Committee Add new text to read as follows: An electrically conductive bar or cable used to connect adjacent cells. This term is used in companion proposals for Article 480 but is not defined (see: 480.xx, Mechanical Connections; 480.xx Intercell and Intertier Conductors; and 480.xx Battery & Cell Terminations. This definition is preferred by the IEEE Stationary Battery Committee. This proposal was developed as a joint effort of the NEC DC Task Force of the Technical Correlating Committee and the IEEE Stationary Battery Codes Working Group. The DC Task Force is chaired by John R. Kovacik / Underwriters Laboratories, and the IEEE Codes Working Group is chaired by Steve McCluer / Schneider-Electric. This proposal is the collaborative effort of battery manufacturers, users, integrators, installers, engineers and other battery stakeholders. The battery sub-task group members are Phyllis Archer / C&D ; Curtis Ashton / Century Link; Matt Balmer / Mitsubishi; Allen Byrne / Interstate Batteries; Bill Cantor / TPI Engineering; Terry Chapman / SCE; Troy Chatwin / GE; Allen Fowler / Eaton; Dan Lambert/ APC; Linda Little / IBEW; Robert Lord / Analex; Ron Marts / Telcordia; Stephen McCluer / Schneider Electric; Dan McMenamin / DNM Assoc.; Mark Ode / UL; John Polenz / Emerson; Rob Wills / Intergrid. 15

20 13-30 Log #2993 NEC-P13 Stephen McCluer, APC by Schneider Electric / Rep. IEEE Stationary Battery Committee Add new text to read as follows: An electrical conductor used to connect two cells on different tiers of the same rack or different shelves of the same rack. This term is used in companion proposals for Article 480 (see 480.xx Mechanical Connections; 4890.xx Battery and Cell Terminations; and 480.xx Intercell and Intertier Conductors), but is not defined. This definition is preferred by the IEEE Stationary Battery Committee. This proposal was developed as a joint effort of the NEC DC Task Force of the Technical Correlating Committee and the IEEE Stationary Battery Codes Working Group. The DC Task Force is chaired by John R. Kovacik / Underwriters Laboratories, and the IEEE Codes Working Group is chaired by Steve McCluer / Schneider-Electric. This proposal is the collaborative effort of battery manufacturers, users, integrators, installers, engineers and other battery stakeholders. The battery sub-task group members are Phyllis Archer / C&D ; Curtis Ashton / Century Link; Matt Balmer / Mitsubishi; Allen Byrne / Interstate Batteries; Bill Cantor / TPI Engineering; Terry Chapman / SCE; Troy Chatwin / GE; Allen Fowler / Eaton; Dan Lambert/ APC; Linda Little / IBEW; Robert Lord / Analex; Ron Marts / Telcordia; Stephen McCluer / Schneider Electric; Dan McMenamin / DNM Assoc.; Mark Ode / UL; John Polenz / Emerson; Rob Wills / Intergrid Log #2994 NEC-P13 Stephen McCluer, APC by Schneider Electric / Rep. IEEE Stationary Battery Committee The value assigned to a cell or battery of a given voltage class for the purpose of convenient designation; the operating voltage of the cell or system may vary above or below this value. This term is used in Article 480. Unlike alternating current, batteries always start at a higher voltage and decrease during discharge. They are recharged at a voltage higher than nominal. This definition can be applied to either a cell or a battery. This proposal was developed as a joint effort of the NEC DC Task Force of the Technical Correlating Committee and the IEEE Stationary Battery Codes Working Group. The DC Task Force is chaired by John R. Kovacik / Underwriters Laboratories, and the IEEE Codes Working Group is chaired by Steve McCluer / Schneider-Electric. This proposal is the collaborative effort of battery manufacturers, users, integrators, installers, engineers and other battery stakeholders. The battery sub-task group members are Phyllis Archer / C&D ; Curtis Ashton / Century Link; Matt Balmer / Mitsubishi; Allen Byrne / Interstate Batteries; Bill Cantor / TPI Engineering; Terry Chapman / SCE; Troy Chatwin / GE; Allen Fowler / Eaton; Dan Lambert/ APC; Linda Little / IBEW; Robert Lord / Analex; Ron Marts / Telcordia; Stephen McCluer / Schneider Electric; Dan McMenamin / DNM Assoc.; Mark Ode / UL; John Polenz / Emerson; Rob Wills / Intergrid. 16

21 13-32 Log #2995 NEC-P13 Stephen McCluer, APC by Schneider Electric / Rep. IEEE Stationary Battery Committee Add new text to read as follows: Terminal: That part of a cell, container, or battery to which an external connection is made (commonly identified as post, pillar, pole, or terminal post). This term is used in Article 480 (if other proposals are accepted) but is not defined. This definition is preferred by the IEEE Stationary Battery Committee. The parenthetical statement clarifies that is the official term, but it acknowledges that other terms are commonly used that mean the same thing. This proposal was developed as a joint effort of the NEC DC Task Force of the Technical Correlating Committee and the IEEE Stationary Battery Codes Working Group. The DC Task Force is chaired by John R. Kovacik / Underwriters Laboratories, and the IEEE Codes Working Group is chaired by Steve McCluer / Schneider-Electric. This proposal is the collaborative effort of battery manufacturers, users, integrators, installers, engineers and other battery stakeholders. The battery sub-task group members are Phyllis Archer / C&D ; Curtis Ashton / Century Link; Matt Balmer / Mitsubishi; Allen Byrne / Interstate Batteries; Bill Cantor / TPI Engineering; Terry Chapman / SCE; Troy Chatwin / GE; Allen Fowler / Eaton; Dan Lambert/ APC; Linda Little / IBEW; Robert Lord / Analex; Ron Marts / Telcordia; Stephen McCluer / Schneider Electric; Dan McMenamin / DNM Assoc.; Mark Ode / UL; John Polenz / Emerson; Rob Wills / Intergrid Log #2997 NEC-P13 Stephen McCluer, APC by Schneider Electric / Rep. IEEE Stationary Battery Committee Over current protection shall not be required for conductors from a battery rated with a nominal voltage of less than volts if the battery provides power <etc> A disconnecting means shall be provided for all ungrounded conductors derived from a stationary battery system with a nominal voltage over volts. A disconnecting means shall be readily accessible and located within sight of the battery system. The change from 50 volts to 60 volts harmonizes Article 480 with Table 11(B) in Chapter 9 and (A)(1)(b). The voltage levels from 60 volts and less provide safety levels for shock and fire hazards. This proposal was developed as a joint effort of the NEC DC Task Force of the Technical Correlating Committee and the IEEE Stationary Battery Codes Working Group. The DC Task Force is chaired by John R. Kovacik / Underwriters Laboratories, and the IEEE Codes Working Group is chaired by Steve McCluer / Schneider-Electric. This proposal is the collaborative effort of battery manufacturers, users, integrators, installers, engineers and other battery stakeholders. The battery sub-task group members are Phyllis Archer / C&D ; Curtis Ashton / Century Link; Matt Balmer / Mitsubishi; Allen Byrne / Interstate Batteries; Bill Cantor / TPI Engineering; Terry Chapman / SCE; Troy Chatwin / GE; Allen Fowler / Eaton; Dan Lambert/ APC; Linda Little / IBEW; Robert Lord / Analex; Ron Marts / Telcordia; Stephen McCluer / Schneider Electric; Dan McMenamin / DNM Assoc.; Mark Ode / UL; John Polenz / Emerson; Rob Wills / Intergrid. 17