In this diagram the incoming hot wire attaches to the first switchs common dark colored terminal. Three way switches are always used in pairs and include special wiring connections.
Two Way Switch Light Wiring
Different 3 way switch wiring. The black and red wires between sw1 and sw2 are connected to the traveler terminals. The two hot wires of three wire cable connect to a pair of brass colored traveler terminals on each switch. Wires consisting of a line a load a neutral a pair of travelers and two 3 way switches. There are no onoff markings on the switch toggle. A 3 wire nm connects the traveler terminals of the first and second 3 way switch together. If you are trying to troubleshoot a 3 way switch operation then you will need to identify the function of each wire.
The pair of travelers on one switch connect to the pair of travelers on the other switch. 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. With conventional wiring the common wire from one switch connects to line the common wire from the other switch connects to the load lights. There are three screw terminals on the body of the switch in addition to the green grounding. Each 3 way switch in these examples are controlling the power source to the same load. This might seem intimidating but it does not have to be.
Any of the above can be modified to control multiple lights. Take a closer look at a 3 way switch wiring diagram. Components of 3 way switch wiring. The common terminal of the second 3 way switch connects to the light fixtures. 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. A third type is the four way switch which is used in conjunction with two three way switches to control lighting from more than two locations.
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. With these diagrams below it will take the guess work out of wiring. Diagrams shown on this page are simplified for clarity. There are two clear giveaways that identify a switch as being a three way type. The white neutral wires are connected together in each switch box. The three way switch is a variation of the standard single pole switch which controls a light only from one location.
All of the switches shown below are 3 way. Such markings are not needed with this type of switch as they are. Pick the diagram that is most like the scenario you are in and see if you can wire your switch. 3 way switches have three terminals one common usually black color and one pair of travelers usually brass color. 3 way switch wiring diagram. Traveler wires are interchangeable on each switch.
Conventional 3 way switch wiring configuration. This 3 way switch wiring diagram shows how to wire the switches and the light when the power is coming to the light switch. The black line wire connects to the common terminal of the first 3 way switch. Below is a variation with the light between the two switches ie panel switch light switch. Three wire cable runs between the switches and 2 wire cable runs to the light. Additional lights are just.
3 way switch circuits variations single light circuits. All three way switch and 2 way switch wiring diagrams have the same basic components. Controlling more than one light.
Gallery of Different 3 Way Switch Wiring
