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Ground Fault Circuit Interrupter(GFCI). Sometimes known as a GFI, or a residual-current device (RCD or RCCB). Can refer to receptacles as well as circuit breakers. They detect a leak in current, or an imbalance between the current on the hot and neutral wires. This is used to prevent electrical shock. Use with the [electrical] tag

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A GFCI controls all the lights in the bathroom

Brand new house, when I test the GFCI in the bathroom, all the lights and fan go off. When I reset the GFCI they all come back on. Is that normal? …
James Reis's user avatar