lak
10 gauge wire to a 20 amp breaker. Be awear that 10 gauge is a bit harder to attach to the AC outlet, but it can be done for sure.Yes, the heavier the gauge, the more difficult it is to work with. One workaround when using 10 ga. or 8 ga. wire on a 20A receptacle is to use a pigtail from the wire to the outlet.