Circuit 4 Way Switch Wiring Diagram Light Middle. 4 way switch wiring diagrams. A four way switch is added when there are more than two switch locations operating the same light.
The red and white are used as travelers between the 4 way and sw2. A four way switch is added when there are more than two switch locations operating the same light. This white wire does not connect to the 4 way switch.
The other pair of the third switch 4 way.
The black wire running to the 4 way switch is connected to the hot terminal on the light and at the switch box it s spliced to the black wire from the common on sw2. This white wire does not connect to the 4 way switch. In the diagrams below the first switch 3 way common terminal connects to line voltage. A circuit is one large loop with power going out to the various outlets lights and other fixtures through the hot wire and returning to the source through the neutral wire.
