RTW
Member
I have a lighting circuit without over current protection on the secondary side of the transformer. The feeder for the primary side of the transformer originates at a bus box 100 feet away from the transformer. Power to the transformer comes by way of (2) #12awg with a 15 amp circuit breaker 3 feet ahead of the transformer. The transformer is a 3KVA, 1 phase, 480/120. The secondary side or the transformer feeds six, 120 volt, 175 watt lights, by way of (4) #10awg which originate at the transformer and peel off as they go out to the lights. The lights are located 150 feet away from the transformer. Again the secondary side has no over current protection. I have read sections 450 and 240 in the NEC and become more confused after each reading. Can anyone direct me to a wiring diagram that shows how to apply these sections to the example I have described?