Andrew Mawby: 3 Way & 4 Way Switch Wiring Diagram

3 Way Switch Wiring Video

3 Way Switch Diagram - Easy To Do

The diagram below is based on the video you watched above. It's important to realize you must put the line wire on the single black screw on the switch.

The line wire is the one that is hot all the time. The black feed wire that goes to the light fixture is connected to the single black screw on the other 3-way switch.

3-Way Switch Wiring Diagram

A point often overlooked is the traveler wires. These wires connect to the brass screws on the switch. It doesn't make any difference how you connect them at each switch.

The white neutral wires are wire-nutted together and do not connect to the switch. The same is true for the bare or green grounding wires.

4-Way Switch Wring Diagram

A 4-way switch is always placed in between two 3-way switches. Watch the 4-Way Switch video below and pay attention.

If you understand how to wire a 3-way switch, you'll have no issues with a 4-way switch.

You can have an indefinite number of 4-way switches in a circuit. They all must be between the two 3-way switches.

The last house I built for my family in Amberley Village, Ohio had four switches in the kitchen controlling a few lights. You can see me operate all four switches in the video below.