In some locales all bathroom wiring including the lights must be gfci protected.
Bathroom vanity light wiring diagram.
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All receptacles must be afci and gfci protected either by circuit breakers or individual receptacles that offer afci and gfci protection.
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A basic wiring plan for a bathroom includes a 20 amp gfci protected circuit for the receptacles and a 15 amp general lighting circuit for the switches light fixtures and vent fan.
Light fixtures and wall switches must be on a separate circuit.
Others permit bathrooms to share circuits with receptacles or lights in other rooms.
Wiring a light switch diagram 1.
The lights and fan must be on a different circuit from the receptacle s.
A 15 amp circuit is minimum but this is often a 20 amp circuit especially if there is a heat lamp integrated into this circuit.
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Some codes require that bathrooms have their own circuits.