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Electrical Wire and Cable

4 Way Switch Wiring Diagrams

By Dave Rongey - Summary:

How to Wire 4 Way Switches with Easy to Understand Wiring Diagrams – Fully explained 4 way switch diagrams. 4-way switches are a convenient way to operate lighting fixtures from three or more locations.

How to Wire 4 Way Switches

Electrical Question: How do I wire a 4 way switch source to a 3 way switch with the light from the 4 way switch?

This electrical wiring question came from: Mike, a Homeowner from Arnold, Maryland.
See more about Home Wiring for Maryland

Dave’s Reply:
Thanks for your electrical wiring question Mike.

How to Wire 4 Way Switches with Easy to Understand Wiring Diagrams

Skill Level: Intermediate to Advanced.
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 circuit, turn it OFF and  Tag it with a Note before working with the wiring.

4 Way Switch Wiring
4 Way Switch Wiring

Electrical wire

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2 Responses to “4 Way Switch Wiring Diagrams”
  1. Dave Rongey says:

    Hi Andy,
    If a fixture light is dim this usually means that the switch wiring is incorrect and the light circuit is creating a voltage feedback, or there is another problem with the electrical system of the home. There are several methods of wiring a 4way switch in conjunction with 3way switches. I would suggest examining the 4way wiring diagrams which you may access from the links provided in the article above which may help you correct the 4way switch and light fixture wiring configurations.
    I hope this helps,

  2. Andy Erdin says:

    I have a 4 way switch with power coming into the first switch, then it sends power to a 3wire up to light fixture, then it is going to next light, and down to next light which is also on the 4 way switch with a 3wire that goes to next switch. When I turn the lights on, one is not working and one light is dim. Can you help me please?