Knowing how to wire a three way lighting switch comes down to understanding the operation of this contraption. Take a closer look at a 3 way switch wiring diagram. In the 1st diagram below a 2 wire nm cable supplies power from the panel to the first switch box. Typical 3 way switch wiring nm cable. A 3 wire nm connects the traveler terminals of the first and second 3 way switch together. By correctly connecting two of these switches together toggling either switch changes the state of the load from off to on or vice versa. At each switch in the above 3 way switch wiring diagram the black wire gets connected to the common copper or black screw. 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. 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.
A 3 wire nm connects the traveler terminals of the first and second 3 way switch together. 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. This might seem intimidating but it does not have to be. The basic 3 way switch wiring diagram. The white wire becomes the energized switch leg as indicated by using black or red electrical tape. This is the 3 wire cable which you must have to wire a 3 way light switch. Knowing how to wire a three way lighting switch comes down to understanding the operation of this contraption. Wiring diagram 3 way switch with light at the end in this diagram the electrical source is at the first switch and the light is located at the end of the circuit. With these diagrams below it will take the guess work out of wiring. In this diagram the incoming hot wire attaches to the first switch s common dark colored terminal.
With these diagrams below it will take the guess work out of wiring. The exact cable you use depends on the. In the 1st diagram below a 2 wire nm cable supplies power from the panel to the first switch box. The white wire becomes the energized switch leg as indicated by using black or red electrical tape. The switches may be arranged so that they are in the same orientation for off and contrasting orientations for on. This might seem intimidating but it does not have to be. 3 way switch is a multiway switching or interconnection of two or more electrical switches to control an electrical load from more than one location. Traveler wires are interchangeable on each 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. The black and red wires between sw1 and sw2 are connected to the traveler terminals.
In this diagram the incoming hot wire attaches to the first switch s common dark colored terminal. By correctly connecting two of these switches together toggling either switch changes the state of the load from off to on or vice versa. Electrically a typical 3 way switch is a single pole double throw spdt switch. The white wire becomes the energized switch leg as indicated by using black or red electrical tape. The black line wire connects to the common terminal of the first 3 way switch. Pick the diagram that is most like the scenario you are in and see if you can wire your 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. 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.
A three way switch is fundamentally different in its operation from a regular two way switch. With these diagrams below it will take the guess work out of wiring. Pick the diagram that is most like the scenario you are in and see if you can wire your switch. The black line wire connects to the common terminal of the first 3 way switch. The exact cable you use depends on the. By correctly connecting two of these switches together toggling either switch changes the state of the load from off to on or vice versa. The two hot wires of three wire cable connect to a pair of brass colored traveler terminals on each switch. Wiring diagram 3 way switch with light at the end in this diagram the electrical source is at the first switch and the light is located at the end of the circuit. 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. Electrically a typical 3 way switch is a single pole double throw spdt switch.
