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Electrical Wire and Cable

The Key to Wiring Three Way Switches

By Dave Rongey - Summary:

My three way switches do not work right, how can I fix this? The key to wiring three way switches, Identifying the wires.

Three Way Switches

Electrical Question: My three way switches do not work right, how can I fix this?

This electrical question came from: Tom, a Homeowner from Butler, Pennsylvania.

Dave’s Reply:
Thanks for your electrical question Tom.

How to Wire Three Way Switches

Application: Wiring Three Way Light Switches.
Skill Level: Intermediate to Advanced – Best installed 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 lighting circuit, turn it OFF and Tag it with a Note before working with the wiring.
Notice: Installing additional 3-way switch wiring should be done according to local and national electrical codes with a permit and be inspected.
Materials: Make sure replacement 3-way light switches have the same amperage and voltage rating as the original three way light switch, and is the switch is fully compatible with the electrical circuit, the light fixture and the type of light bulbs being used.

Wiring Three Way Switches

NOTE: There are several 3way switch wiring scenarios that are possible however, the existing switch wring must be identified so that the right three way switch wiring configuration can be made in order for the 3-way switches to work correctly.

The Key to Three Way Light Switch Wiring

The key to wiring three way switching is to identify the following:

More about Wiring Three Way Switches

The Following Diagrams will assist you with Three Way Switches
How to Wire a Switch


3 Way Switch Diagram

3 Way Switch Diagram

Learn How to Wire it Right with my
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