This configuration may be used in open plan homes or in large kitchens or great rooms where a central bank of lighting fixtures might be controlled from more than two entry points. With these diagrams below it will take the guess work out of wiring.
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3 way switch connection. Pick the diagram that is most like the scenario you are in and see if you can wire your switch. 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 terminal is usually identified by a darker colored screw. With a pair of 3 way switches either can make or break the connection that completes the circuit to the light. 3 way switches have three terminals one common usually black color and one pair of travelers usually brass color. Take a closer look at a 3 way switch wiring diagram.
A 3 wire nm connects the traveler terminals of the first and second 3 way switch together. The whole wiring a light switch project can be completed in a few hours if you dont have to do any drywall removal and repair. With conventional wiring the common wire from one switch connects to line the common wire from the other switch connects to the load lights. This might seem intimidating but it does not have to be. 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. Such markings are not needed with this type of switch as they are.
When wiring a 3 way switch first screw the terminal screws of the new switch until they are difficult to turn. There are no onoff markings on the switch toggle. Keep reading and learn how to wire a light switch. There are three screw terminals on the body of the switch in addition to the green grounding. The black line wire connects to the common terminal of the first 3 way switch. The key to wiring 3 way switches the power feed and the switch leg leading to the fixture s typically one at each switch location are attached to the screw terminal found at one end of the switch by itself.
Connect the wire marked common to the black or dark colored screw. There are two clear giveaways that identify a switch as being a three way type. 3 way switch wiring diagram. The three way switch is a variation of the standard single pole switch which controls a light only from one location. Run new cable romex between the 3 way switches regardless of what 3 way switch wiring diagram youre following youll need to use a 3 wire cable to connect the two 3 way light switches. Connect the two remaining traveler wires to the two brass or light colored screws.
All of the switches shown below are 3 way. Connect the ground wire to the green screw. 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.
Gallery of 3 Way Switch Connection
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