DonaldSparkyDog
Member
I was sizing a feeder to a 170 ton chiller based on the nameplate data of the chiller. MCA=343, I sized 2x2"w/3ea 2/0 thwn, MOCPD=450amps, I sized a 450amp breaker. The inspector says the feeder size must be large enough to be protected by the breaker. I think this is a motor feeder and the breaker can be sized larger than the wire ampacity but can not locate those verbs in the NEC.