4 Way Switch Wiring
Summary: 4 way switch wiring fully explained with fully detailed wiring diagrams. 4-way switches are a convenient way to operate lighting fixtures from three or more locations. The electrical wiring adds additional wiring to the same principles of 3-way switching.
Please Note:
To illustrate the 4 way switch wiring, Switch boxes and Fixture boxes are not shown but are obviously required for every application. These diagrams are shown as using the Romex wiring method. These Romex cables contain a ground conductor which is required for all applications as well. The ground conductors are always bonded together to insure the integrity of the ground path. If you are using metal boxes, the ground conductor must be attached to each box by using a threaded ground screw or provided attachment. The frames of the switches which have a ground screw are to be attached to the ground conductor as required.
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[Questions or comments]
4 way switch wiring:
4-Way Switches provide switching from three or more locations. If more than three switches are needed, simply place more 4-way switches between the three way switches.
This 4 way switch wiring diagram #1 shows the power source starting at the left 3-way switch.
This 4 way switch wiring diagram #2 shows the power source starting at the fixture. The white wire of the romex going to the switch is attached to the black line in the fixture box using a wirenut. The white wire becomes the energized switch leg, as indicated by using black or red electrical tape.
4 Way Switch Wiring, top of page
More about home electrical switches:
Wiring a Light Switch
3-Way Switches
Residential Wiring Diagrams
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