winslowfam
Senior Member
- Location
- VA
Hi...we have an HVAC unit with a minimum circuit amps (MCA) rating of 33A and a maximum overcurrent protective device (MOPD) size of 45A from the manufacturer. I would like to use #10 AWG conductors for the power feeder but just want to make sure I am not running against NEC 240.4 (D) for small conductors where 30A breaker is the max size allowed for #10 AWG. I think having it be an HVAC circuit exempts me from that restriction.