4-Way Switch Wiring

4-Way Switch Wire Colors

There is no standard for wire colors on 3 and 4-way switch travelers. The colors will vary depending on whether NM cable or conduit was used.

With NM cable, the wire colors for travelers will be black and red using 3-wire cable.

With conduit, the wire colors for travelers could be any color.

Typical 4-Way Switch Wiring Diagram, NM Cable

4-Way Decora Switch Wiring Diagram, NM Cable

4-Way Toggle Switches

4-War Decora Switch es

4-Way Switch Wiring Page 2

Troubleshoot 4-Way Switches

4-Way Switch Wiring 3 Switches

4-way switches have four terminals each with two pairs of travelers (one pair usually black and and the other pair brass color). A three switch configuration will have two 3-way switches, one on each end and one 4-way switch in the middle.

In the diagrams below, switch 1 common terminal connects to line voltage.

Switch 1 pair of traveler terminals connects to the top or bottom pair of traveler terminals on switch 2.

The other pair of switch 2 travelers connect the traveler terminals of switch 3.

The switch 3 common terminal connects to the load (lights).

Diagrams shown on this page are simplified for clarity. Electrical outlet boxes can have numerous NM cables going in and out. See Actual Switch Box Wiring Diagram.

Ground connection diagram is shown separately.