708 – Critical Operations Power Systems (COPS)

708.24(D) – Bypass Isolation Automatic Transfer Switches

Change at a Glance:

New List Item (D) added to address bypass isolation automatic transfer switches where necessary for a designated COPS building.

708.24 Transfer Equipment. [Critical Operations Power Systems (COPS)]

(A) General. (See NEC for complete Code text)

(B) Bypass Isolation Switches. (See NEC for complete Code text)

(C) Automatic Transfer Switches. (See NEC for complete Code text)

(D) Bypass Isolation Automatic Transfer Switches. Where loads are supplied by only one automatic transfer switch, the automatic transfer switch shall include a bypass isolation switch to facilitate maintenance as required in 708.6(C) without jeopardizing continuity of power. When the bypass isolation transfer switch is in the bypass mode, either it shall automatically initiate transfer between power sources upon loss of the connected power source or it shall remain actively supervised by a qualified person who can manually initiate a transfer between power sources.

(E) Use. (See NEC for complete Code text)

(F) Documentation. (See NEC for complete Code text)