4 Way Switch Internal Diagram

Sometimes there is only a switch wiring diagram printed on the inside of the 4 way switch package box. This 4 way switch diagram 2 shows the power source starting at the fixture.

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A 4 way switch has five terminals.

4 way switch internal diagram. 4 way switches have four terminals each with two pairs of travelers one set usually black and one set usually brass color. A 4 way switch is always placed in between two 3 way switches. To view it at full size click on the diagram.

One ground and 4 circuit terminals divided into two matching pairs called travelers. With 4 way switches you must read the manufacturer s instructions or wiring diagram. The 4 way is used when you want to control the light or lights from two or more locations.

A 4 way switch wiring diagram is the clearest and easiest way to wire that pesky 4 way switch. In the diagrams below the first switch 3 way common terminal connects to. I have a few of the most common ways in wiring a 4 way switch to help you with your basic home wiring projects.

The white wire of the cable going to the switch is attached to the black line in the fixture box using a wirenut. The center switch is 4 way switch while the outer two switches are 3 way. Conventional 4 way switch wiring.

A four switch configuration will have two 3 way switches one on each end and two 4 way switches in the middle. You can have an indefinite number of 4 way switches in a circuit. A 3 wire nm connects the traveler terminals of the first 4 way.

Watch the 4 way switch video below and pay attention. A 4 way switch must be wired between two 3 way switches as shown in the diagrams on this page. This 4 way switch diagram 1 shows the power source starting at the left 3 way switch.

For complete instructions on wiring a basic 4 way switch see our wiring a 4 way switch article. The black line wire connects to the common terminal of the first 3 way switch. They all must be between the two 3 way switches.

Each pair of traveler terminals should be wired to the traveler wires from one of the 3 way switches in the circuit. In the 1st diagram below a 2 wire nm cable supplies power from the panel to the first switch box. 4 way switch wring diagram.

Click here to access note. For a discussion of how to wire such circuits see 3 way and 4 way light switches. That page and its links also discuss proper wire colors and several wiring alternatives.

A 3 wire nm connects the traveler terminals of the first 3 way switch and the first 4 way switch. Shown above is an animation of a circuit using three switches to control a light. Four way switches are used any time when more than two switches are needed to control a light.

This presentation shows the internal workings of the four way. Four way switch wiring instructions inside the switch packaging. The wiring connections on 4 way switches varies between manufacturers.

This diagram is a thumbnail. If you understand how to wire a 3 way switch you ll have no issues with a 4 way switch.

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