Three Way Light Switch Circuit

3 way switch wiring diagram depicting all wires in the ceiling junction box.

Three way light switch circuit.

3 way switch wiring diagram line to light fixtureline voltage enters the light fixture outlet box. A 3 way light switch allows you to control a light source from two separate points. Run new cable romex between the 3 way switches. In the above 3 way switch wiring diagram at each switch the black wire gets connected to the copper or black screw.

This might seem intimidating but it does not have to be. 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. Interested in a 4 way switch wiring diagram. 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.

Regardless of what 3 way switch wiring diagram you re following you ll need to use a 3 wire cable to connect the two 3 way light switches. Pick the diagram that is most like the scenario you are in and see if you can wire your switch. Take a closer look at a 3 way switch wiring diagram. With a pair of 3 way switches either can make or break the connection that completes the circuit to the light.

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. The methods shown here are some of the safest and most versatile though not the only options. Wiring a 3 way light switch is certainly more complicated than that of the more common single pole switch but you can figure it out if you follow our 3 way switch wiring diagram. Wiring a 3 way light switch.