Three Way Light Switch Circuit

In the above 3 way switch wiring diagram at each switch the black wire gets connected to the copper or black screw.

Three way light switch circuit. 3 way switch wiring diagram line to light fixtureline voltage enters the light fixture outlet box. There are several ways to install a 3 way light switch. Interested in a 4 way switch wiring diagram. Although a 3 way is one of the hardest electrical circuits to figure out it s also one of the most useful.

3 way switch wiring diagram depicting all wires in the ceiling junction box. This might seem intimidating but it does not have to be. A 3 way light switch allows you to control a light source from two separate points. In the ceiling light fixture electrical box one black wire from a 3 way switch gets connected to the black load wire on the light fixture.

So what you should see if you have correct 3 wire electrical cable romex is a black power white neutral and now a 3rd red wire. Pick the diagram that is most like the scenario you are in and see if you can wire your switch. With these diagrams below it will take the guess work out of wiring. With a pair of 3 way switches either can make or break the connection that completes the circuit to the light.

Run new cable romex between the 3 way switches. Wiring a 3 way light switch. No longer allowed after 2011 nec if no neutral wire in switch boxes 3 way switch wiring diagram light fixture between switchesline voltage enters the first 3 way switch outlet box light fixture is located between switch boxes no longer allowed after 2011 nec if no neutral wire in switch boxes. Take a closer look at a 3 way switch wiring diagram.