Let's say I want a subpanel in the garage. It will drive 220V and 110V outlets. How should I determine the amp on the breaker on the main panel that would serve the subpanel? That would also determine the gauge of the wire leading to subpanel, obviously. The simplest way is the obvious one, add all amp ratings of various outlets, being mindful that the 110V outlets would be on different legs. Is that the best way though?
Specifically, what I want is a 30A 220V outlet, a 20A 220V outlet, and two 20A 110V outlets on two legs. The sum is 70A. Note that it is unlikely that I will use both 30A and 20A 220V outlets at the same time. So, this means that I should be able to get away with 50A service.
Makes sense?
i