ECN Forum Forums Code Related Discussion NEC & other Code issues UPS cabling & shared raceways

The UPS manual says the alarm & signaling circuits are Class 1, and should be installed IAW NEC Class 1 requirements. NEC 725.26(A) Permits Class 1 circuits to share a cableway with power cables, but only if it's rated for the highest voltage in the raceway. The cabling installed on-site gave no indication of any voltage rating.

Also, the power cabling they installed was labeled "TW75" What the heck is TW75, Canadian THW?

NEC 250.20(D) FPN No.1 notes that on-site generators are not considered separately derived if the neutral is solidly interconnected to the service-supplied neutral. As this is the case with this UPS, I do not believe it would be considered separately derived.