Issue:
Color coding required for the branch wiring of a hospital isolated power system

Product Line:
Hospital isolated power systems

Environment:
NFPA99, NEC517.160

Resolution:
The NEC requires color coding of the conductors based on the NEC edition in effect as referenced below:

NFPA 70 (2011 & 2008)
517.160 Isolated Power Systems
(A) Installations.
(5) Conductor Identification.
The isolated circuit conductors shall be identified as follows:
(1)Isolated Conductor No. 1 — Orange with at least one distinctive colored stripe other than white, green, or gray along the entire length of the conductor
(2)Isolated Conductor No. 2 — Brown with at least one distinctive colored stripe other than white, green, or gray along the entire length of the conductor
NFPA 70 (2005)
517.160 Isolated Power Systems
(A) Installations.
(5) Conductor Identification.
The isolated circuit conductors shall be identified as follows:
(1)Isolated Conductor No. 1 — Orange
(2)Isolated Conductor No. 2 — Brown

Released for: Schneider Electric USA