How to Wire a Bath Exhaust Fan and Light Wiring a Bath Exhaust Fan and Light. Power Sources for a Bath Exhaust Fan and Light The scenario described in this question prevents using the existing light switch wiring because the 3-way switch wiring does not provide the necessary neutral with the light circuit power source. Power From a GFCI Outlet Wiring Diagrams for GFCI Outlets - Do-it-yourself-help GFCI Outlet Wiring to Protected a Light. This diagram illustrates the wiring for a circuit with 2 gfci receptacles followed by a light and switch. By connecting the switch to the load terminals on the last gfci, the switch and light are protected against ground faults as well. Ceiling Fan Wiring Diagram Light Switch | House Electrical This article contains a ceiling fan wiring diagram and a light kit. The wiring arrangements for electrical source at the switch and at the ceiling fixture. It could be a single switch wiring or double switch wiring. Every wire connected to a switch are hot wires. The neutral wires and ground wires are Wiring a Bathroom Exhaust Fan Light Combo How to Install Wiring for a Bathroom Exhaust Fan - Bathroom Exhaust Fan Heater Electrical Wiring - The white neutral wires would be tied together at the wall switch box. Understand that this is a typical wiring scenario, however the actual wiring connections may be different for your specific unit. wiring - How to wire GFCI together with two switches I'm installing a GFCI Outlet in the bathroom using 12/2 wire on a 20 amp breaker. The outlet box contains GFCI Outlet, 1st Switch to control light/Exhaust Fan in ceiling, 2nd Switch to control vanity light above sink. I have a closet in the bathroom which has an outlet box with both 12/2 and 14/2 running to the box. This is the end of the circuit.