Service Equipment Overcurrent Protection, Part 1

Service Equipment Overcurrent Protection, Part 1

In an industrial facility today, leaving out a power monitoring system when specifying the service equipment is almost always a poor decision.

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

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