7/10/2016
4­way Switch Wiring ­ Electrical 101
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4­way Switch Wiring
Electrical
Switches
Light Switch
Wiring
Multiple
Switch
Wiring
3­way
Switches
3­way Switch
Wiring
Alternate 3­
way Switch
Wiring
Typical 4­way Switch Wiring
In the diagram below, a 2­wire NM cable supplies power from the panel to the first switch box. The black (line/120
V) wire connects to the common terminal of the first 3­way switch.
A 3­wire NM connects the traveler terminals of the first 3­way switch and the first 4­way switch. A 3­wire NM
connects the traveler terminals of the first 4­way switch and the second 4­way switch, and so on. A 3­wire NM
connects the traveler terminals of the last 4­way switch and the second 3­way switch. Traveler wires are
interchangeable on each switch.
The common terminal of the second 3­way switch connects to the light fixture(s).
The white neutral wires are connected together in each switch box.
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.
Typical 4­way Switch Wiring Diagram
4­way
Switches
4­way Switch
Wiring
Alternate 4­
way Switch
Wiring
Dimmer
Switches
Photocells
and Timers
Ceiling Fan
Switch
Wiring
Motion
Detectors and
Occupancy
Sensors
All traveler wires are interchangeable
between pins of each switch
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