Main Circuit Breaker

[Gary SM]

Do I need a Main Circuit Breaker on a Distribution Panel when the feeder is to be connected to a 600A circuit breaker integral to the Service rated ATS with and
to 600A circuit breaker integral to Quick Connect Cabinet (for connection to portable generator)?

 

[John08]

So the ATS normal and emergency generator power feed the distribution panel? If so what amperage is the panel rated for? If 600 amps or more then a main breaker is not required as it’s already protected upstream from the ATS. So you could use a main lug panel instead of main breaker.

 

[Gary SM]

So the ATS normal and emergency generator power feed the distribution panel? If so what amperage is the panel rated for? If 600 amps or more then a main breaker is not required as it’s already protected upstream from the ATS. So you could use a main lug panel instead of main breaker.

I thought so and yes, main lugs only for the Distribution panel. The distribution panel is rated at 600Amp as well as the ATS and the Quick Connect. Thank you