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Does the type of conductor used within an isolated power system (IPS) make any difference?

Issue:
Installation/setup
Product Line:
Hospital Isolated Power Systems

Environment:
NFPA99, NEC517.160
Cause:
Resolution:
NEC 517.160 (A) (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
The use of XHHN or XHHN-2 wire helps meet this requirement.
 
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