Can a Distribution panel have 400Amp main breaker (480/277V, 3 phase) and (1) 300Amp/3P and (1) 250Amp branch breakers?
What article in NEC governs this? Thanks.
Can a Distribution panel have 400Amp main breaker (480/277V, 3 phase) and (1) 300Amp/3P and (1) 250Amp branch breakers?
What article in NEC governs this? Thanks.
Yes ! More to the point, there in no Code Article that prohibits it.
The sum of the branch breakers often exceed the rating of the main. It all has to do with load diversity.
