ECN Forum Forums General Topics of the Trade General Discussion Area 208, 240, & 277 volt questions

As for 277/480 on romex. I too think that is just a bad idea. (Unless you provide anyone working in the building hot gloves and a course in CPR.) To me the difference there is a "little shock" or full arithmia, and a burn to go with the bite. Although not against the NEC, most of the places that I work in wont allow it in commercial, and I personally would be frightened by 277 in Romex. It is too fragile in terms of insulation integrety IMO for that hazardous a voltage. Little shock, and spark -vs.- death, and fire.