A 3 wire nm connects the traveler terminals of the first and second 3 way switch together. Take a closer look at a 3 way switch wiring diagram.
3 Way Switch Wiring Diagram
Three way switch wiring. The source in this circuit is at the first switch and the light fixture is. Typical 3 way switch wiring nm cable in the 1st diagram below a 2 wire nm cable supplies power from the panel to the first switch box. This 3 way switch wiring diagram shows how to wire the switches and the light when the power is coming to the light switch. First bend hook in the ground wire wrap around the green screw. When wiring a 3 way switch circuit we will be using a 3 wire cable known as romex coming from the source such as the breaker box. Pick the diagram that is most like the scenario you are in and see if you can wire your switch.
3 way switch wiring diagrams wiring diagram 3 way switch with light at the end. In this diagram the incoming hot wire attaches to the first switchs common dark colored terminal. This might seem intimidating but it does not have to be. In this diagram the electrical source is at the first switch and the. 3 way switch wiring with. Three way switch wiring with light middle.
Then a 4 wire cable going between the two 3 way switches and then a 3 wire cable going from the switches to the load. 3 way switch wiring diagram. Connect the wire marked common to the black or dark colored screw. All three way switch and 2 way switch wiring diagrams have the same basic components. Connect the two remaining traveler wires to the two brass or light colored screws. Connect the ground wire to the green screw.
If you are trying to troubleshoot a 3 way switch operation then you will need to identify the function of each wire. The two hot wires of three wire cable connect to a pair of brass colored traveler terminals on each switch. With these diagrams below it will take the guess work out of wiring. The black line wire connects to the common terminal of the first 3 way switch. Wires consisting of a line a load a neutral a pair of travelers and two 3 way switches. You will see a black screw and two gold screws on the switch.
The black screw is the common which we identified in the steps above as the switch leg or hot power source. When wiring a 3 way switch first screw the terminal screws of the new switch until they are difficult to turn. Take your three way switch.
Gallery of Three Way Switch Wiring
