The NEC requires each ungrounded service conductor to have overload protection [Sec. 230.90]. And you can’t insert an overcurrent protection device in a grounded service conductor unless it simultaneously opens all conductors of the circuit [Sec. 230.90(B)].
Hey, this sounds great. You just need a panel with the correct overcurrent protection devices (OCPDs) at your service and, because that meets Code, you’ve done all you need to do. Right?
In an industrial fa