michael johnston executive director standards and … · michael johnston executive director...

MICHAEL JOHNSTON

EXECUTIVE DIRECTOR STANDARDS AND SAFETY – NECA

Top Changes 2014 NEC®

2/12/13 Copyright NECA 2013

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)


2014 NEC – New Articles

�  Article 393 Low Voltage Suspended Ceiling Power Distribution Systems [ROP 18-10a]

�  Article 646 Modular Data Centers [ROP 12-147]

�  Article 728 Fire Resistive Cable Systems [ROP 3-170] �  Article 750 Energy Management Systems [ROP

13-180]


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.


CHAPTER 1

General


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�  Proposal 10-5, Comment 10-2 �  The word “choice” has been replaced by the words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.


110.16 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 110.21(B) has been added.


Section 110.21(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.


110.25 Lockable Disconnecting Means

�  Proposal 1-130 �  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.


Section 110.26(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.


Section 110.26(C)(3) Personnel Doors

�  Proposal 1-145

�  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.”


CHAPTER 2

Wiring and Protection


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.


Section 210.12(A)

�  Proposals 2-80 and 2-82a, Comments 2-48 – 2-50 �  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.


Section 210.12(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 Pass and Seymour Legrand

Courtesy Eaton Corporation

Section 210.64 Electrical Service Areas

�  Proposal 2-191 �  New Section 210.64 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.


Section 250.102(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.


CHAPTER 3

Wiring Methods and Materials


Section 310.10(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.


310.15(B)(3)(c) and Table 310.15(B)(3)(c)


�  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 310.15(B)(3)(c) apply.


310.15(B)(3)(c) and Table 310.15(B)(3)(c)

�  Proposal 6-41, Comment 6-37 �  Ambient temperature correction factors in Table

310.15(B)(2)(a) or Table 310.15(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.


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.


INFRASTRUCTURE:

Ceiling

Walls

Furniture

Floors

© 2010 EMerge Alliance

380 VDC Bus

24 VDC Bus

208-277 VAC

P4 P2

P2

P1 P3


CHAPTER 4

Equipment for General Use


Section 406.3(E) Controlled Receptacle Marking

�  Proposal 18-15, Comment 18-13 �  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):


Section 410.6 Listing Required

�  Proposal 18-59 �  Revision expands the listing requirement to retrofit

kits for lampholders and luminaires.

�  New definition of the term "retrofit kit" added to Article 100.


Section 422.23 Tire Inflation and Automotive Vacuum Machines

�  Proposal 17-31 �  Any tire inflation equipment or vacuum machine for

public use must be protected by ground-fault circuit-interrupter (GFCI) protection for personnel.

�  The GFCI protection (circuit breaker or outlet

device) is required to be readily accessible.


Section 440.9 Grounding and Bonding

�  Proposal 11-83, Comment 11-32 �  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

350.60(B) and 358.60(B).


501.40 Multiwire Branch Circuits

l Proposal 14-59

l Section 501.40 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).


517.18(B) Patient Bed Location Receptacles


�  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.


517.19(B) Patient Bed Location Receptacles


�  This revision in subdivision (B) changes the required minimum number of receptacles from six to fourteen.

�  Aligns with changes in NFPA 99-2012


517.19(C) Operating Room Receptacles

l Proposal 15-41

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.


690.12 Rapid Shutdown of PV Systems on Buildings


�  PV system circuits installed on or in buildings must include a rapid shutdown function that controls specific conductors in accordance with 690.12(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.


Article 750 Energy Management Systems


�  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.


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, 2013 – 11:00 am - 12:00 noon EST.


MICHAEL JOHNSTON

EXECUTIVE DIRECTOR STANDARDS AND SAFETY – NECA

Top Changes 2014 NEC®


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