Source of Neutral

[ctrane]

I've been searching NEC, and need some help. Existing installation, I have an enclosed Circuit Breaker as point of service, 480/277V, 3-Phase, 4-Wire. This breaker serves an MCC, that is 3-Phase, 3-Wire (Did not bring Neutral). I now need to add a 480/277V Panel, but the only place to tap is an empty bucket in the MCC (Phase Lugs on enclosed circuit breaker are all full). Can I get the 3 phases from the MCC and then pull the neutral from the enclosed circuit breaker's neutral bar? They are all in the same room. Is there some code that states that neutral must come from the MCC, because in the end, everything is derived from the Enclosed Circuit Breaker (Point of Service). Any help will be most appreciated.

 

[LarryFine]

Can I get the 3 phases from the MCC and then pull the neutral from the enclosed circuit breaker's neutral bar?

I would say yes, as long as the new neutral conductor is routed through the same raceway as the MCC's feeders, etc.

 

[augie47]

neutral

neutral

for what it's worth, I agree