3 Way Junction Box Wiring Diagram. The junction box should be wired as shown below. In the ceiling light fixture electrical box one black wire from a 3 way switch gets connected to the black load wire on the light fixture.
Wiring diagram of a one way lighting circuit using junction boxes fig 1. Traveler wires are interchangeable on each switch. 3 way junction box wiring diagram wiring diagram is a simplified tolerable pictorial representation of an electrical circuit.
The black line wire connects to the common terminal of the first 3 way switch.
A 3 wire nm connects the traveler terminals of the first and second 3 way switch together. Explanation of above picture. This 3 way light switch wiring diagram shows how to do the light switch wiring and the light when the power is coming to the light fixture. In the above 3 way switch wiring diagram at each switch the black wire gets connected to the copper or black screw.
