thinker
Electrical
- Aug 2, 2001
- 247
NEC allows to use a rigid metal conduit as equipment grounding conductor. Please advise where I can find information on electrical properties of conduits to estimate, say, 3" trade size conduit body conductivity and determine what would be AWG size of the corresponding copper equipment grounding conductor.The practical situation: at one of installations contractor forgot to pull equipment grounding conductors along with power wires (isolated DC system). It is impossible to add (pull) new conductors, so we are considering bonding both ends of the conduit and using it as a grounding conductor. Normally, we would use,say, AWG # 4/0 wire as equipment grounding conductor. Now we need to evaluate would the conduit be an adequate replacement.