By Tiphanie Priscilla. Bathroom Electrical. Published at Monday, February 12th, 2018 - 14:24:55 PM.
Each bathroom should have a circuit for lighting and an exhaust fan. This may include a blower-heater-light combination. There should also be a 20-amp circuit, separate from the lighting circuit, to provide power for an outlet to feed things like curling irons, razors, hair dryers, and even portable milk house heaters.
Some local codes allow you to control the fan by itself, while others require that the fan come on with the lighting. If your bathroom is like mine, you may have a vanity light and a fan/light combo. You could have a switch for the combo and another for the vanity light. As for a light/fan/heater combo, it's likely the heater may indeed need a circuit of its own, depending upon the amperage draw of the unit.
Some local codes may require only a GFCI receptacle for safety, while others may require that all the circuits in the bathroom be protected by GFCI circuit breakers. Electrical safety is always an issue when dealing with wet locations especially.
Just remember, these are the bare minimum requirements, and you can add more circuits as you see fit to accommodate the load of the appliance you plan to plug in or add to your bathroom.
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