In this diagram the incoming hot wire attaches to the first switchs common dark colored terminal. Connect the black insulated wire to the shunt or common terminal screw of the switch once again the common screw terminal is the different colored screw from the rest of those on the switch.
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Different ways to wire a 3 way switch. Power through the lights to three way switches has two wire cable and ground between the light boxes and three wire cable and ground at the switches. It is but you need to use four conductor cable as seen below. This electrical wiring diagram shows power into light switch box 1 wire to light from switch box 1 and from switch box 1 to three way light switch box 2. Wiring diagram for a 3 way switch one of the many wiring diagrams showing different methods of wiring a three way switch circuit. The black line wire connects to the common terminal of the first 3 way switch. Here the source and the fixtures come before the switches.
In this situation you. The common terminal of the second 3 way switch connects to the light fixture s. A three conductor cable with a ground is then installed between the two 3 way switch boxes. Here is a rather different arrangement that requires 3 conductor cable between lights. A 3 wire cable runs between sw1 and sw2. This might seem intimidating but it does not have to be.
Connect 3 wire cable in the second switch box to the switch. A 3 wire nm connects the traveler terminals of the first and second 3 way switch together. As with the other diagrams on this page more lights can be added by duplicating the wiring arrangement between the fixtures. 3 way switch wiring diagram. This 3 way switch wiring diagram shows how to wire the switches and the light when the power is coming to the light switch. 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.
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. Pick the diagram that is most like the scenario you are in and see if you can wire your switch. Take a closer look at a 3 way switch wiring diagram. Note that in this case a larger than normal device box is required at switch 1 location due to box fill calculations most regular size boxes will only accommodate five wires. A 3 wire cable runs from l1 to l2 and 2 wire cable runs from there to the first switch. Traveler wires are interchangeable on each switch.
I think that the most common method used to wire a set of 3 way switches is to bring the two wire line cable into one switch box and bring the two wire load cable into the other switch box. The two hot wires of three wire cable connect to a pair of brass colored traveler terminals on each switch. Connect all ground wires as previously described if not already completed. White or neutral wire taped with black electricians tape is used as black power wire to make connections throughout. With these diagrams below it will take the guess work out of wiring. Occasionally someone will ask if it is possible to wire a circuit that connects panel switch light light switch.
Gallery of Different Ways To Wire A 3 Way Switch
