Wiring Diagram Exhaust Fan. The exhaust fan has three wires out of the winding: The black wire (hot wire) is connected to a ground pin on the controller, while the white and black wires (neutral and live wires) are connected together to form a single wire that can be used as.

Bathroom light and fan wiring diagram. One thing to consider with this setup is the fan can easily get left on for long periods of time which can. When the switch is off.