gauge (posted by Steve)

[ASKNACHI]This question was posted on AskNACHI.org by Steve (from Sparks, NV). [/ASKNACHI]what gauge electrical wire do you need for a 100 amp breaker

Typically, #4 CU or #2 AL.

agreed

Becareful…you can’t apply 310.15(B)(6) if it is a feeder to a subpanel