Breaking down the Wiring Diagram: Current enters through the black wire towards the 1 st switch box, attached to the common terminal.; Down position of the 1 st switch means exiting through the red wire and then visiting through traveler terminal into 2 nd switch.; Down position of the 2 nd switch means again exiting but this time through 3 way switch common wire black and enters the light.. A 4 way switch must be wired between two 3 way switches as shown in the diagrams on this page. A 4 way switch has five terminals: one ground and 4 circuit terminals divided into two matching pairs called travelers. Each pair of traveler terminals should be wired to the traveler wires from one of the 3 way switches in the circuit.
[Diagram 3] 3-way switch wiring: power at light, light first [Download Pdf] This configuration requires a two-wire cable between the light fixture and the first switch and a three-wire cable between the two switches. The wiring procedure for this configuration using nm cables is as follows:. Also included, are diagrams for 3 way dimmers, a 3 way ceiling fan, and an arrangement for a switched outlet from two locations. For more information about these circuits and troubleshooting tips for 3-way circuits, check below. Wiring Diagram 3 Way Switch with Light at the End. In this diagram, the electrical source is at the first switch and.