1. A 379 KVA genset with 1200 amp OPD replaced a 258 KVA genset adjusted to 410 amps OPD feeding a 400 amp transfer switch and 400
amp MDP. There is parallel 4/0 with # 3 ground conductors pulled frpm gen to Transfer then MDP. Would it be code compliant to up size the ground 3/0 to handle 1200 amps fault current. Is 445.13 referring to the conductors which are commonly installed by the factory from the terminals to the built-in generator main breaker which could be considered the first distribution device and overcurrent protection? Or does it refer to the conductors from the genset main breaker to an external distribution panel?
amp MDP. There is parallel 4/0 with # 3 ground conductors pulled frpm gen to Transfer then MDP. Would it be code compliant to up size the ground 3/0 to handle 1200 amps fault current. Is 445.13 referring to the conductors which are commonly installed by the factory from the terminals to the built-in generator main breaker which could be considered the first distribution device and overcurrent protection? Or does it refer to the conductors from the genset main breaker to an external distribution panel?