does a separate circuit for a single outlet do the same job as a GFCI?

  • 3
    What leads you to think that it does? – A. I. Breveleri Jul 10 '17 at 20:50
  • No. The two are not even remotely connected. – The Evil Greebo Jul 12 '17 at 17:07

GFCI (ground fault circuit interrupter) has nothing to do with what the circuit is on.

Essentially, a GFCI shuts off if the current on the hot and neutral wires are not equal. This happens when there's a literal ground fault (hot has some pathway to ground, such as through frayed insulation), or there's a dangerous situation, like current is flowing through a person or through water and going to another ground (like a water pipe).

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A GFCI can operate independently on a circuit with other non-GFCI outlets, on a dedicated circuit, and it can also protect other downstream outlets. There are also circuit breakers with GFCIs integrated that protect the entire circuit.

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