?
Tuesday, March 14, 2017
Question:
I have a customer with 3 phase service equipment feeding. A 3 phase sub panel at 240v omitting the third c phase. Is this a violation of NEC
Mike Dearing
A
Answer:
Hey Mike thanks for your question. No. Unless there is something in the instructions for the panelboard that requires all phase conductors to be installed or requires that if only two phase conductors are installed that they use specific poles such as A and C as stated in 110.3(B).