Bath Exhaust Fan Wire Connections
How do I wire the wall switch wires for my bathroom exhaust fan wires? Wiring Connections for an Exhaust Fan, How to Connect the Wires of a Bath Exhaust Fan.
Guide to Wiring Connections for a Bath Exhaust Fan
Electrical Question: How do I wire the wall switch wires for my bathroom exhaust fan wires?
- I am installing an exhaust fan in my bathroom.
- One black and white wire is coming from panel and other one coming from the on and off switch.
- Please guide me how to connect these wire to the fan.
- The fan is simple with black and white wire.
This electrical wiring question came from: Ram, a Homeowner from Toronto, Canada.
Additional Comments: Very informative.
Thanks for your electrical wiring question Ram.
How to Connect the Wires of a Bath Exhaust Fan
Application: Wiring a Bath Exhaust Fan.
Skill Level: Beginner to Intermediate – Best performed by a Licensed Electrician.
Tools Required: Basic Electricians Pouch Hand Tools and Voltage Tester.
Estimated Time: Depends on personal level experience and ability to work with tools.
Precaution: Identify the bathroom light circuit, turn it OFF and Tag it with a Note before working with the wiring.
Wiring Connections for an Exhaust Fan
- Overview of Wiring
- Wiring switched power for a bathroom exhaust fan is basically the same as wiring a light switch.
- This example describes the wiring connections where the power source and the exhaust fan wires are located in the wall switch box.
- Identify the Power Source and Exhaust Fan Wires
- Identify the cable which supplies the wires from the circuit power source. This is typically a 2-wire cable with a black and white wire and a ground wire.
- A careful test using a non-contact tester of the black wire will indicate the power source.
- Splicing the White Neutral Wires
- Neural wires are not attached to the switch, but are spliced together.Sometime white wires are attached to a switch, however that is because the white wire is being used as a switched leg of the power wiring.
- The white neutral wire of the power source and the exhaust fan are spliced together using a yellow or red wire connector.
- Wiring the Switch
- A single pole switch is not polarized, so it does not matter which of the black wires are placed on the two brass screws of the switch.
- Strip off the insulating about an inch from the end of each of the black wires of the power source and the exhaust fan.
- Attach each of the black wires to the brass terminal screws on the side of the switch so the loop of the wire will be facing in a clockwise orientation with the wire loop directly under the head of the screw.
- Using a flat blade screwdriver tighten each screw down firmly to create a solid connection.
- Grounding the Components
- The circuit ground wires are the most important wires of the circuit because they protect the circuit components in the case of circuit overload or short circuit conditions.
- Ground wires are spliced together and bonded to the switch and to metallic switch boxes, as well as the device, which in this case is the exhaust fan.
- The bonding process of the ground wire of the circuit involves attaching a lead of the ground wires to a green grounding screw on the frame of the switch, a green grounding screw of the switch box and the exhaust fan enclosure. Some exhaust fans will supply a prewired bonded green ground wire which is used for the connection with the ground wire.
- Wiring the Exhaust Fan
- A typical exhaust fan will have a set of wires located inside the junction box which is located a part of the exhaust fan enclosure.
- The entry hole for the cable to be connected to the exhaust fan must be fitted with a cable connector which will insulated and protect the cable. This can be either a 2-screw connector, or a plastic insulated cable connector.
- Strip off the insulating about an inch from the end of each of the black wire of the cable at the exhaust fan.
- Create a splice for each pair of wires, color to color, and complete each splice using a yellow or red wire connector which is fastened firmly to create a secure splice.
More about Wiring a Bathroom Exhaust Fan
- Bathroom Exhaust Fan
- Answers to all of your questions about installing a bath exhaust fan and your bathroom exhaust fan replacement project.
- Bathroom Electrical Wiring
- Fully Explained Photos and Wiring Diagrams for Bathroom Electrical Wiring with Code Requirements for most new or remodel projects.
- Wiring a Light Switch – Diagram 1
- Fully explained pictures and wiring diagrams about wiring light switches describing the most common switches starting with photo diagram 1.
- Electrical Wire for the Home
- Complete listing of electrical wire types and parts used for home projects with electrical code information serves as selection guidelines.
Consult your Local Building Department about Permits and Inspections for all Electric Wiring Projects.
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