Panel board sizing
This question kind of approaches this subject from the back side.
I have a project where there is a 480vac drop, but no panel boards. We want to install a transformer and panel board to get 120/208 for general use receptacles.
The drop is 480vac/100amp. I back calculated the maximum transformer size to be 83KVA. We'll use a 75KVA. The secondary will be about 200amps, if I did my calculations correctly.
The question is this. Based on this information, what is the maximum panel board size that I can attach to this service?