Wiring A 4 Way Light Switch Diagram. Power from light fixture to light switch. 4 way switch wiring with light first.
The other pair of the second switch 4 way travelers connect to one pair of the third switch 4 way travelers. This diagram illustrates wiring for a 4 way circuit with the electrical source at the light fixture and the switches coming after. When wiring in the 4 way switch it is most simply described as simply cutting the two traveler wires the two wires that go between the two 3 way switches and terminate on each switch and putting two wires from one switch on the top two terminals of the 4 way switch while putting the other two wires from the other switch on the bottom two terminals.
Power from light fixture to light switch.
Three wire cable runs between the switches and the outlet. The other pair of the second switch 4 way travelers connect to one pair of the third switch 4 way travelers. Then connect the black wire coming from the fixture to the black wire going to the first 3 way switch. In the diagrams below the first switch 3 way common terminal connects to line voltage.
