The white wire becomes the energized switch leg as indicated by using black or red electrical tape. A three way switch is built and wired a little differently than a conventional single pole light switch.
This is the 3 wire cable which you must have to wire a 3 way light switch.
3 way wiring diagram. What is common in the diagrams above and with any 3 way switch circuit is that the power hot wire coming into the circuit will always go to the common terminal of the first switch. The white wire of the cable going to the switch is attached to the black line in the fixture box using a wire nut. So what you should see if you have correct 3 wire electrical cable romex is a black power white neutral and now a 3rd red wire.
In this diagram the electrical source is at the first switch and the light is located at the end of the circuit. Make a small donation 1 5 to keep it running. Wiring diagram 3 way switch with light at the end.
This might seem intimidating but it does not have to be. How 3 way switches are wired these diagrams illustrate how to wire a pair of three way light switches in three different situations. The black and red wires between sw1 and sw2 are connected to the traveler terminals.
Traveler wires are interchangeable on each switch. Was this page helpful. Three way light switches control a light from two locations such as from both ends of a staircase or hallway.
Three wire cable runs between the switches and 2 wire cable runs to the light. Wiring diagrams for 3 way switches 3 way switch diagram 2 above shows the electricity source starting at the fixture. 3 way switch wiring diagram depicting all wires in the ceiling junction box.
3 way switch wiring diagram. In this diagram the incoming hot wire attaches to the first switch s common dark colored terminal. The hot wire from light always goes to the common terminal of the second switch.
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. For example a light in a hallway that can be operated from the first floor and second floor install a three way switch. The black line wire connects to the common terminal of the first 3 way switch.
Installing a 3 way switch with wiring diagrams three way switches control lights and receptacles from two points. In the 1st diagram below a 2 wire nm cable supplies power from the panel to the first switch box. Take a closer look at a 3 way switch wiring diagram.
Pick the diagram that is most like the scenario you are in and see if you can wire your switch. A 3 wire nm connects the traveler terminals of the first and second 3 way switch together. Regardless of what 3 way switch wiring diagram you re following you ll need to use a 3 wire cable to connect the two 3 way light switches.
In the above 3 way switch wiring diagram at each switch the black wire gets connected to the copper or black screw. Typical 3 way switch wiring nm cable. The two hot wires of three wire cable connect to a pair of brass colored traveler terminals on each switch.
This 3 way switch wiring diagram shows how to wire the switches and the light when the power is coming to the light switch. With these diagrams below it will take the guess work out of wiring.