DRAFT OF PROPOSED NFPA 70 2014 Edition NEC

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MikeD

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Link: http://www.nfpa.org/Assets/files/AboutTheCodes/70/70-A2013-ROPDraft.pdf" onclick="window.open(this.href);return false;

There are a number of interesting additions/changes from the previous (2011) edition of Article 625 (Electric Vehicle Charging System) which starts on page 574 (unfortunately this PDF does not attempt to mark added/altered text). Since this is a draft, some changes are possible, but the final version is published in August, I think, so any changes from this version are likely to be minor IMO.

The following seemed to me to be the most significant changes:

"Article 625.14 Rating ... Where an automatic load management system is used, the maximum electric vehicle supply equipment load on a service and feeder shall be the maximum load permitted by the automatic load management system."

"Article 625.17 Cords and Cables -- (A) Power Supply Cord. The cable for cord-connected equipment shall comply with all of the following: ... (3) Have an overall length as specified in (a) or (b):
a. When the interrupting device of the personnel protection system specified in 625.22 is located within the enclosure of the supply equipment or charging system, the power supply cord shall be no more than 300 mm (12 in.) long,
b. When the interrupting device of the personnel protection system specified in 625.22 is located at the attachment plug, or within the first 300 mm (12 in.) of the power supply cord, the overall cord length shall be a minimum of 1.8 m (6 ft) and shall be no greater than 4.6 m (15 ft).
...
(C) Overall Cord and Cable Length. The overall usable length shall not exceed 7.5 m (25 ft) unless equipped with a cable management system that is part of listed the electric vehicle supply equipment."

"Article 625.18 Interlock. Electric vehicle supply equipment shall be provided with an interlock that de-energizes the electric vehicle connector whenever the electrical connector is uncoupled from the electric vehicle." [Previously it read "vehicle connector and its cable".]

"Article 625.44 Electric Vehicle Supply Equipment Connection. Electric vehicle supply equipment shall be permitted to be cord and plug connected to the premises wiring system in accordance with one of the following:
(A) Connections to 125-Volt, Single Phase, 15 and 20 Ampere Receptacle Outlets. Electric vehicle supply equipment intended for connection to receptacle outlets rated at 125 volts, single phase, 15 and 20 amperes or from a supply of less than 50V DC.
(B) Connections to Other Receptacle Outlets. Electric vehicle supply equipment that is rated 250 volts maximum and complies with all of the following:
(1) It is part of a listed system meeting the requirements of 625.18[Interlock.], 625.19[Automatic De-Energization of Cable.], 625.50[Location.] and 625.52[Ventilation.].
(2) It is intended for connection to receptacle outlets rated no more than 50 amperes.
(3) EVSE fastened in place to facilitate any of the following:
a. Ready removal for interchange
b. Facilitate maintenance and repair
c. Repositioning of Portable, movable, or EVSE fastened in place
(4) Power supply cord length for electric vehicle supply equipment fastened in place is limited to 6 ft (1.8 m).
(5) Receptacles are located to avoid physical damage to the flexible cord.
All other electric vehicle supply equipment shall be permanently connected to the premises wiring system. The electric vehicle supply equipment shall have no exposed live parts."

Here are is another change that is important to EVSEs, but outside 625:
"Article 210.17 Electric Vehicle Branch Circuit. Outlet(s) installed for the purpose of charging electric vehicles shall be supplied by a separate branch circuit. This circuit shall have no other outlets."
 
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