Thanks for the replies. I was not as clear as I could have been. I am asking about single phase 240 using the high leg with either 'A' or 'C'. I was aware of the 208 and breaker rating mentioned.
In my area it is an 'understood rule' that only 3ph. goes on the high leg. Transformers and services are sized accordingly. Is it a code issue or just a local thing?
