Do Bathroom Lights Need To Be On Their Own Circuit

Having multiple circuits dramatically reduces the risk of overloading any particular circuit especially when the major appliances are connected to their own dedicated circuits.

Do bathroom lights need to be on their own circuit. Also 21052 D covers the instillation requirements for the bathroom receptacle. A separate circuit is required for a whirlpool tub or any other large fixture or appliance in the bathroom. If the vent fan has a built-in heater it must have its own 20-amp circuit.

You want to avoid wiring the fixtures and the receptacles on the same electrical circuit. Often when you have the receptacles on the circuit with the lights the use of a hairdryer will dim the lights so I dont recommend using only one circuit for the entire bathroom. Some codes require that bathrooms have their own circuits.

The lights and fan must be on a different circuit from the receptacle s. A third 20-amp circuit may be required to. Lighting outlets or receptacle outlets in other rooms may not be supplied by this circuit.

The Bottom Line. Other electricians will put bathroom receptacles on their own circuits ie. Light fixtures and wall switches must be on a separate circuit.

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. One circuit per bathroom receptacles. In some locales all bathroom wiring including the lights must be GFCI-protected.

If the only work you are carrying out is the replacement of the light fitting I would recommend that you provide RCD protection for the lighting circuit. How do you tell if outlets are on the same circuit. It does not require a separate circuit for each bathroom.