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How to Wire Three Way Switches Part 2

3Way Switch Wiring Diagrams

3Way Switch Diagrams #4, #6 and #6

wiring-a-3-way-switch Summary: 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.

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Understanding 3 Way Switches


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How to Wire a 3Way and 4Way Light Switches

Helping You to Wire It Right!

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The name "three-way" can be a somewhat misleading because there are only two switches that are used to turn on and off one or more light fixtures from two locations.

An electrician may understand that a three way switch is actually a single pole, double throw switch. What this means is that a three way switch has a common terminal which toggles power from the other two terminals.

A three way switch is unlike a single pole light switch because it does not have an ON or OFF position, and you will not see the ON and OFF markings on a three way switch.

Where are Three Way Switches most commonly used?

Examples where three way switches are found in residential homes:

Hallway Lighting
Install 3way switches at each end of the hallway.

Stairway Lighting
Install 3way switches at the upstairs and downstairs locations.

Garage lighting
Install a 3way switch in the garage, and inside the house.


3-Way Switch Wiring
3-Way Switching provides switching from two locations
3-way switch wiring diagram #4

3-Way Switch Wiring Diagram #4 above, shows the electric circuit source power starting at the lower 3-way switch.

3-way switch wiring diagram #5

3-Way Switch Wiring Diagram #5 above, shows the electric circuit source power starting at the light fixture box, and the switch wiring leads out to the two 3way light switches.


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Frequently Asked Questions

More about Wiring 3way Switches


How Can I Light Up a Dark Hallway at Night for my Child?

I have a 6 year old who is terrified to walk down the dark hallway at night to get to the bathroom. I wanted to switch out the 3-way switch for a 3-way dimmer switch so I can leave the light on but dimmed so the whole hallway is illuminated.


Installing Three Way Dimmer Light Switches

How to Install One or Two 3-Way Dimmer Switches: I have 4 kitchen ceiling lights that are currently controlled by two 3-way switches. I’d like to add a dimmer.


How To Fix 3Way Light Switch Wiring Video

How to Get Your 3Way Light Switches Working: The Most Common Problems with 3Way Switches and How to Fix Them.


Wiring Diagrams for 3-Way Switches

The Key to Wiring 3-Way Switches – The Power Feed and the Switch Leg leading to the fixture(s) typically, one at each switch location, are attached to the screw terminal found at one end of the switch by itself


Wiring a Wemo Light Switch on a 3-way switch

I’m installing a Wemo 3way WiFi Switch replacing an existing 3-way switch.


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Learn more about Wiring 3way Switches

Electrical Wiring Video #2


Electrical Wiring Tips for Home Electrical Wiring Projects

Tripping Circuit Breaker, Outlet at a Wall Switch, Light Fixture without a Ground Wire, Help with Home Electrical Wiring Projects.

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Complete Guide to Home Electrical Wiring
Perfect for the Homeowner, Handyman, Electrician and Building Inspector.
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Methods for Home Electrical Wiring
Types of Light Switches and Lighting Controls How They are Wired
Wiring Diagrams for Light Switches
Wiring 3-Way Switches
Wiring 4-Way Switches
Wiring Dimmer Switches
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