[WizenedEE]

The gauge of the wire you should use depends solely on the circuit breaker; that's for safety. See [R44].

The amount of current your motors will draw really depends on which motor you're using and how you're using it. For example, last year we used 20 amp breakers with our window motors because their stall current was 21 amps. However, for CIMs on the drivetrain or other high-load applications, you'll definitely be at a disadvantage with 30 amp breakers.

Of course, you can also mix and match breakers; so you could buy just a bit of 12 gauge wire for the drive train and use 16 gauge wire for your light duty things.