Let's say I have an air conditioner with a minimum circuit ampacity of 28.2 amps. It then says that the max breaker is 45 amps. Am I compliant using #10 nm-b from the panel to the unit and having a 45 amp breaker or am I still required to have a 30 amp breaker? I always thought you choose the wire size by the mca of the unit and then use the max breaker size.