480 – Storage Batteries

480.7(G) – Directory and Identification of Power Sources for Storage Batteries

Change at a Glance:

New requirements were added for directory and identification of power sources for storage batteries.

480.7 DC Disconnect Methods (Storage Batteries)

(A) Disconnecting Means. A disconnecting means shall be provided for all ungrounded conductors derived from a stationary battery system with a voltage over 60 volts dc. A disconnecting means shall be readily accessible and located within sight of the battery system.
Informational Note: See 240.21(H) for information on the location of the overcurrent device for battery conductors.

(B) Emergency Disconnect.
[see Analysis changes at 230.85 and 445.18(D) for One- and Two-Family Dwelling Emergency Disconnect requirements]

(C) Disconnection of Series Battery Circuits.

(B)(D) Remote Actuation.

(C)(E) Busway.

(D)(F) Notification.

(G) Identification of Power Sources. Battery systems shall be indicated by 480.7(G)(1) and (G)(2).
(1) Facilities with Utility Services and Battery Systems. Plaques or directories shall be installed in accordance with 705.10 and 712.10.
Exception: This requirement does not apply where a disconnect in 480.7(A) is not required.
(2) Facilities with Stand-Alone Systems. A permanent plaque or directory shall be installed in accordance with 710.10.

(see NEC for complete text)