Had a discussion with a colleague of mine. We have a 1600A service, all the panels down stream are being fed from the MDP with (5) 400A/3P circuit breakers. I am saying we don't need a MCB because we can shut the building down with the five breakers which is less then six. He is saying we need a MCB because the sum of the breakers is greater than the total service size. (ie. (5) x 400A = 2000A) which is greater then 1600A.
He is saying this is in the NEC. but I can't seem to find it anywhere. Ive been doing this a long time and never heard of this, has anyone else?
If hes right, what would be the code section?
Thanks Guys
PS. The load calc for each respective panel is less then 400A, far less in most cases. The total demand is also less then 1600A.
He is saying this is in the NEC. but I can't seem to find it anywhere. Ive been doing this a long time and never heard of this, has anyone else?
If hes right, what would be the code section?
Thanks Guys
PS. The load calc for each respective panel is less then 400A, far less in most cases. The total demand is also less then 1600A.