I'm an electrical contractor installing a generator in a Skilled Nursing Facility. The code section is 517-40 (1999 code used by the State of California). The size is 75 KW and the installation is outdoors (NEMA 3R). A question was raised by an Architect for a requiement to use only galvanized steel conduit for the emergnecy power. I an unable to locate it in NFPA 70 or NFPA 110. Has anybody seen this requirement?
