The sewage ejector system in our basement is on a GFCI outlet that is on the same circuit as the adjacent bathroom (fan, light and switch).

Someone told me it needs a dedicated circuit. Does the NEC require this? I think it makes sense to share the bathroom circuit. If the pump's breaker trips then how would I know? If the lights are off I'm not going to flush the toilet.


It all depends on several things.

What size is the circuit? What else is one it? What do the manufacturer's instructions say?

Typically you'd only need a dedicated circuit for something like this if it is big enough to warrant it, or if the mfg requires it.

When I say big enough I mean 50% of the circuit size since you are combining a fixed in place appliance (the pump) with general use items.

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