On an inspection yesterday on a home built in 2004, the label on the air handler indicated that it needed a minimum ampacity of 59 amps. The circuit breaker for the air handler was rated at 45 amps. To make matters worse, the wire connected to the circuit breaker was a 10 gauge wire which,as I understand it, is only rated for 30 amps.
First of all, how was this unit operating without tripping the breaker? Second of all, am I right that the wire is undersized?