Top Changes 2014 NEC

Transcription

1 Top Changes 2014 NEC MICHAEL JOHNSTON EXECUTIVE DIRECTOR STANDARDS AND SAFETY NECA

2 General Information This presentation previews significant changes for the 2014 NEC. Two-part series on 2014 NEC changes to follow. There were 3745 proposals submitted and acted on (includes CMP proposals) There were 1625 comments submitted and acted on (includes CMP comments)

3 2014 NEC New Articles Article 393 Low Voltage Suspended Ceiling Power Distribution Systems [ROP 18-10a] Article 646 Modular Data Centers [ROP ] Article 728 Fire Resistive Cable Systems [ROP 3-170] Article 750 Energy Management Systems [ROP ]

4 Code-Wide Changes Revisions in the NEC Style Manual require INs to follow the rule they pertain to [3.1.3]. Requirements for DC systems and wiring incorporated throughout the NEC. Raising the 600 Volts threshold to 1000 Volts in multiple articles throughout the NEC.

5 General CHAPTER 1

6 100 Coordination (Selective) Proposal 10-5, Comment 10-2 The word choice has been replaced by the words selection and installation to clarify it is selection and installation of overcurrent protection that achieves selective coordination. Selective coordination is across the full range of available overcurrents.

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8 Arc-Flash Hazard Warning Proposals 1-105, 9-14a, Comment 1-47 Revision adds the words or factory and switchgear to the rule. Clarifies that the marking could be applied in the field or at the factory by a manufacturer. Reference to (B) has been added.

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10 Section (B) Field-Applied Hazard Markings Proposal 1-114, Comment 1-61 New subdivision (B) adds requirements for warning, caution, or danger, markings, labels, or signs required by the NEC. Informational Notes refer to ANSI Z535.4.

11 Lockable Disconnecting Means Proposal New section provides consistent requirements for Code rules that require a lockable disconnecting means. Coordinated revisions remove text from all sections that provide the specific requirements for lockable disconnecting means.

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13 Section (C)(3) Personnel Doors Proposal 1-143a Revision reduces the ampere value 1200 to 800 amperes. Clarifies the requirements for panic hardware are required for large equipment with an 800-ampere rating or greater.

14 Section (C)(3) Personnel Doors Proposal Revised to include only the term panic hardware. Revision removes the terms simple pressure plates and other devices that are normally latched but are released under simple pressure. Promotes consistency with applicable Building Codes that only use the term panic hardware.

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16 Wiring and Protection CHAPTER 2

17 Section 210.8(A)(10) Laundry Areas Proposal 2-47 New list item (10) added to Section 210.8(A). (10) Laundry Areas now required to have GFCI protection for 125-volt, single phase, 15- and 20- ampere receptacles.

18 Section (A) Proposals 2-80 and 2-82a, Comments Change adds laundry areas and kitchen branch circuits and outlets to the AFCI protection requirements. Continues the progression toward whole-house protection originally sought by CPSC in the 1999 NEC development cycle.

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20 Section (A)(4) AFCI Protection Proposal 2-92, Comment 2-52 Revision recognizes use of circuit breakers or outlet devices at the first outlet in the circuit. Specific conditions must be met to apply for outlet AFCI devices. Courtesy Eaton Corporation Courtesy Pass and Seymour Legrand

21 Section Electrical Service Areas Proposal New Section added to Article 210 and exception for one- and two-family dwelling units. At least one 125-volt, single-phase, 15- or 20-ampere receptacle outlet within 15 m (50 ft) of the electrical service equipment.

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23 Section (C) New Table Proposal 5-42 New table provides minimum sizes for other than grounding electrode conductors bonding jumpers for the grounding electrode system. Minimum sizing of line-side bonding jumpers, grounded conductors, main bonding jumpers, system bonding jumpers.

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25 Wiring Methods and Materials CHAPTER 3

26 Section (H)(2) Conductor Characteristics Proposal 6-15, Comment 6-7 A new list item (6) expands the requirements for parallel conductor installations. If paralleled in raceways or enclosures, conductors shall be grouped to minimize imbalance and prevent inductive heating.

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28 310.15(B)(3)(c) and Table (B)(3)(c) Proposal 6-31, Comment 6-29 Revised to remove the term circular raceways and add the term cables. Where conductors or cables installed in raceways or cables are exposed to direct sunlight on or above rooftops, the adjustments shown in Table (B) (3)(c) apply.

29 310.15(B)(3)(c) and Table (B)(3)(c) Proposal 6-41, Comment 6-37 Ambient temperature correction factors in Table (B)(2)(a) or Table (B)(2)(b) do not apply to XHHW-2 insulated conductors in raceways and cables on or above rooftops and exposed to direct sunlight. Performance testing by both General Cable and Underwriters Laboratories.

30 Article 393 Low Voltage Suspended Ceiling Power Distribution Systems Proposal 18-10a, 18-7 New Article added to Chapter 3. Provides requirements for low voltage DC equipment (lighting and power) connected to a ceiling grid systems built for this purpose.

31 24 VDC Bus VAC INFRASTRUCTURE: 380 VDC Bus Ceiling Walls Furniture Floors P2 P1 P4 P3 P EMerge Alliance

32 Equipment for General Use CHAPTER 4

33 Section 406.3(E) Controlled Receptacle Marking Proposal 18-15, Comment New marking symbol required for receptacles controlled by an automatic control device or by an automatic energy management system. Change includes new Figure 406.3(E):

34 Section Listing Required Proposal Revision expands the listing requirement to retrofit kits for lampholders and luminaires. New definition of the term "retrofit kit" added to Article 100.

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36 Section Tire Inflation and Automotive Vacuum Machines Proposal Any tire inflation equipment or vacuum machine for public use must be protected by ground-fault circuitinterrupter (GFCI) protection for personnel. The GFCI protection (circuit breaker or outlet device) is required to be readily accessible.

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38 Section Grounding and Bonding Proposal 11-83, Comment This revision requires a wire-type equipment grounding conductor(s) be installed in the outdoor portion of EMT and LFMC for air-conditioning and refrigeration equipment in outdoor locations. The EGC must be a wire type as required in (B) and (B).

39 Multiwire Branch Circuits l Proposal l Section and the exception have been deleted. l The requirements for simultaneous disconnection of all ungrounded conductors of multiwire branch circuits are already provided in 210.4(B).

40 517.18(B) Patient Bed Location Receptacles Proposal This change increases the minimum number of receptacles required from four to eight. Aligns with NFPA 99 relative to the increases in quantity of receptacles and normal care patient bed locations.

41 517.19(B) Patient Bed Location Receptacles Proposal This revision in subdivision (B) changes the required minimum number of receptacles from six to fourteen. Aligns with changes in NFPA

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43 517.19(C) Operating Room Receptacles l Proposal l The minimum number of receptacles required in an operating room is thirty-six, twelve of these must be connected to either the normal system branch or the critical system branch. l The grounding terminal of these receptacles must be connected to the reference grounding point by means of an insulated copper equipment grounding conductor.

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45 Rapid Shutdown of PV Systems on Buildings Proposal 4-253, Comment PV system circuits installed on or in buildings must include a rapid shutdown function that controls specific conductors in accordance with (A) through (D). Controlled conductors shall be limited to no more than 30 volts and 240VA within 10 seconds of rapid shutdown. Voltage and power measured between any two conductors and between any conductor and ground.

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47 Article 750 Energy Management Systems Proposal New article is titled Energy Management Systems and includes definitions, requirements for alternate power sources, load management provisions, and field marking requirements. Energy codes include performance requirements for managing and conserving energy in buildings or structures.

48 Summary Preview significant changes for the 2014 NEC. New articles to provide rules for new technology. This presentation is a preview of a two-part series covering several significant 2014 NEC changes. March 5 and 12, :00 am - 12:00 noon EST.

49 Top Changes 2014 NEC MICHAEL JOHNSTON EXECUTIVE DIRECTOR STANDARDS AND SAFETY NECA