Thanks for the response.
In step 2, I am not clear on why you are adding 40 and 40?
and where does the factor .866 come from?
Could I not just take the sum of the VAs for the heaviest loaded phase and divide it by 120?
I understand the concern and normally this would be a non-issue as I would size the breaker and feeder for the panel but this is truly special case. I need to know the absolute minimum sizes for both the breaker and feeder.
The problem is that I am unsure of the calculation because the loads...
Normally I would size the main breaker based on the panel rating. But, this panel does not need provisions for future expansion and all circuits are used I would like to have the smallest feeder possible and also the smallest circuit breaker possible.
Hello,
I have a 120/208 Vac panel that is fully populated and due to the nature of this panel installation there is not a need to provide additional expansion. The load is a mix of 120 and 208 lighting loads and receptacle loads (no motors etc.)
The total load on the panel is 26,688VA.
My...
