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Wiring Diagrams for Light Switches
Summary: Fully explained wiring diagrams and photos show how to wire switches including: single switches, 3-way switches, 4-way switches, and dimmer switches.
© By: Dave Rongey
Diagrams for Wiring Light Switches
Before wiring a light switch please consider the following:
Make sure the circuit power has been turned off, and mark the circuit breaker or fuse to indicate that work is being done.
Make sure the switch is correct for your application. The switch should be rated for the circuit voltage and the amperage. For example: A standard light switch in the USA for a bedroom is typically rated for 120 volts, 15 amps.
Before replacing a light switch, make sure to identify the existing wiring before removing the wires. Make a note describing how the wires are connected to the switch. Create a drawing and mark the wires with electrical tape or masking tape. If possible, take a picture of the wiring inside the switch box, and how the wires are attached to the switch.
Easy to Understand Light Switch Wiring - Fully Explained Light Switch Wiring with Diagrams and Pictures with Step-By-Step Instructions to Guide You.
The key to three way switch wiring depends on two main factors. These wiring diagrams help you identify the power feed and the switch leg leading to the fixture.
Continuing on with wiring three way switches, these next three wiring diagrams in this series will help you identify three more possibilities for wiring the power feed and the switch wiring that leads to the light fixture..