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3-Way Switch Wiring Diagram PDF

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3-Way Switch Wiring Diagram PDF Details
3-Way Switch Wiring Diagram
PDF Name 3-Way Switch Wiring Diagram PDF
No. of Pages 21
PDF Size 0.82 MB
Language English
CategoryEnglish
Source envirodata.org
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3-Way Switch Wiring Diagram

Dear readers, here we are presenting a 3-Way Switch Wiring Diagram PDF / Three Way Switch Wiring Diagram PDF to all of you. There are many people who want to know about How to wire a 3-Way switch?. As you know that wiring a 3-way switch is a little more tricky than wiring a 2-way switch. First of all, we need to go over a little basic terminology on switches.

One should use a 3-wire cable known as romex coming from the source for wiring a 3-way switch circuit. Then a 4-wire cable goes between the two 3-way switches and then a 3-wire cable goes from the switches to the load. The 3-wire cable consists of a black wire, a white wire, and a bare copper wire, while the 4-wire cable has an added red wire which is hot as well.

3-Way Switch Wiring Diagram PDF / Three Way Switch Wiring Diagram PDF

3-Wire Cable

Black wire = Power or Hot wire
White wire = Neutral
Bare copper = Ground

4-Wire Cable

Red wire = Power or Hot wire
Black wire = Power or Hot wire
White wire = Neutral
Bare copper = Ground

When wiring a 3-way switch circuit, all we want to do is to control the black wire (hot wire) to turn on and off the load from 2 different locations. The diagram below will give you a better understanding of how this circuit is wired. Notice that there is a 3-conductor cable coming into the first box,

then a 4-conductor cable going from the left box to the right box, then a 3-conductor cable going from the right box to the load. Now for wiring, let’s assume you’re looking at the switch just like it shows.

The Left Box:

  • The lower left screw is the common and gets the black wire from the source (3-cond).
  • The upper left screw gets the black wire from the right box (4-cond).
  • The upper right screw gets the red wire from the right box (4-cond).
  • The white wires tie together with a wire nut.
  • The bare copper wires tie together with a wire nut.
  • Be sure to attach a bare copper wire to the green screw on the switch.

The Right Box:

  • The lower left screw is the common and gets the black wire from the load (3-cond).
  • The upper left screw gets the red wire from the left box (4-cond).
  • The upper right screw gets the black wire from the left box (4-cond).
  • The white wires tie together with a wire nut.
  • The bare copper wires tie together with a wire nut.
  • Be sure to attach a bare copper wire to the green screw on the switch.

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