I had a subpanel installed and it failed for several things one item is that the electriction ran 3c 2awg alumin wire and the inspeactor says that is not good for 100A. The electrition came back and had to run a new wire and he is insisting the 2awg alumin wire is fine for 100Amps. Where can I look this up, my subpanel and main have about 8' of wire connectiong them.

Should he of run #1 wire? Can I preove teh #2 is ok or should I just change the breaker to a 80 amp breaker for the inspector.