I left my code book at the office but I remember somewhere in article 620 where it does state that wiring does need to be in approved conduit, be it pipe or flex but it does not specifically say from the source. No where along the way is any NM wiring exposed. It is stubbed out of the wall directly into the disconnects for the elevator equipment. I also remember reading in 620 that the wire insulation needs to be fire retardant such as THN, THWN etc. Is Romex fire retardant?
