They all must be between the two 3 way switches. One ground and 4 circuit terminals divided into two matching pairs called travelers.
Multiway Switching Wikipedia
3 way switch with 4 wires. Pick the diagram that is most like the scenario you are in and see if you can wire your switch. Each 3 way switch has a common terminal and two traveler terminals. If you understand how to wire a 3 way switch youll have no issues with a 4 way switch. The white wire must be re identified as a hot wire at each switch location. The 4 way switch connects in the middle of the two travelers. 3 way switch wiring diagram with line and load in the same switch box.
Phillips or slotted screwdriver. Wiring a three way dimmer switch uses four wires and allows you the convenience of dimming the light from separate switches at opposite ends of a room. Take a closer look at a 3 way switch wiring diagram. The white wire between switches is not being used as a neutral. Watch the 4 way switch video below and pay attention. Two 3 way switches are connected to each other via traveler wires only one of which is hot in any given switch setting combination.
Turn off the power at the circuit breaker. A 4 way switch must be wired between two 3 way switches as shown in the diagrams on this page. Each pair of traveler terminals should be wired to the traveler wires from one of the 3 way switches in the circuit. An example of three way switch wiring with the line and load in the same 4 square electrical box. A 4 way switch is always placed in between two 3 way switches. You can have an indefinite number of 4 way switches in a circuit.
Find the wires connected to the two traveler terminals. This might seem intimidating but it does not have to be. With these diagrams below it will take the guess work out of wiring. A 4 way switch has five terminals. 3 and 4 way switches are used to control one or more lights or fixtures from 2 or 3 switch locations such as the top and bottom of a flight of stairs.
Gallery of 3 Way Switch With 4 Wires
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