I have a 200 amp main service and am adding a 100 amp Cutler -Hammer Load Center as a subpanel to a garage 220 feet from the main panel. I buried #2 awg aluminum cable 24" in the ground. What size breaker do I use in the main panel for the subpanel.

What size amps do you need at the garage? Can be max 100 amps or anything less than 100 amps.

Blackprince I would like to used the full 100 amps.

Blackprince I would like to used the full 100 amps.

Without knowing the calculated load you can just put a 100A breaker in.

You say you want to use the full 100A? How can you know this without knowing the actual load?