maximum 2pole CB in Loadcenter??

[ndc81167]

does anyone know if the NEC addresses a rule know as
"any 2-2pole circuits cannot meet or exceed the size of the main"...
I remember seeing this But I cant seem to find the code section,,,

if there are any code experts out there please reply..

 

[roger]

No such rule. The main breaker will be the load limit regardless of what the branch breakers add up to.


Roger

 

[ndc81167]

I guess iam answering my own question,,, 408.36,,,I remember reading this a while back,, and made a mental note to remember this ... " not more than 2
main circuit breakers or sets of fuses having a combined rating not greater
than of the panelboard",,, i though it was the "main breaker" but it was refering to the rating of the panelboard...

 

[JohnJ0906]

It may have a maximum size that can be on the same bus finger.
I seem to recall that SqD QO can have a max of 125 amps on each finger, so I couldn't have, say, a 90 amp at position 1-3 and a 60 amp at position 2-4

 

[Pierre C Belarge]

Here is one of the exceptions for services...
230.90(A)exception # 3

 

[roger]

I guess iam answering my own question,,, 408.36,,,I remember reading this a while back,, and made a mental note to remember this ... " not more than 2
main circuit breakers or sets of fuses having a combined rating not greater
than of the panelboard",,, i though it was the "main breaker" but it was refering to the rating of the panelboard...

You are correct, this would be a different question.

Roger