Bathroom Fan And Light And Gfi Wiring Diagram. You can replace almost any electrical outlet with a gfci outlet. The wiring diagram below shows the wiring setup you need to connect your new timed fan to your existing light circuit ceiling rose so that when the ligh is turned on so is the fan.
The shortest route for cables would follow this order. Just to be clear for anyone surfing for a circuit diagram for a bathroom the gfi in this diagram does not protect the fan light it only protects itself. Understand that if the gfi outlet will be protecting the light fixtures then the white neutral wire for the light fixtures must be wired through the gfi outlet the same as the black or power wire.
I have a new bathroom exhaust fan heater light to install in place of an old one and wire the switches.
Panel to gfci outlet 122 gfci outlet to 1st wall sconce 122 1st wall. Therell be main lines which are represented by l1 l2 l3 and so on. Home electrical wiring for bathrooms lighting must be either. They are both fed from a box near the sink which contains a double switch and a gfi outlet.