Is there an NEC requirement that conductors, such as those from the circuit breaker panel to the cold water pipe, be insulated if they are ran through metal raceways such as EMT or metal wiremold? Thanks in advance. Bob
Its my understanding that if you run the grounding electrode in a metal pipe then it has to be bonded to the metal pipe. Something about setting up electromagnetic waves or something. If we do it we use a pipe nail or a clamp to make it continuous with the pipe its in although if it was bare it would seem like it would naturally be in contact. Thats why we usually run it in pvc. I hope i understood what you were getting at.
Re: grounding conductors in EMT#83134 01/16/0307:41 AM01/16/0307:41 AM
Gwz it seems to me that 250.64e says you have to bond each end of a metal raceway if it is not electrically continous. if you used one peice of emt to enclose a gec wouldnt that be electrically countinous?
Re: grounding conductors in EMT#83137 01/20/0307:29 AM01/20/0307:29 AM