3 way electrical switch hook up

Tim Carter What is this special black screw on a 3 way switch? Existing 3 Way Switches Virtually every house has at least one set of three way switches. They may be at the bottom and the top of stairways. Often they can be found at either end of a hallway.

If one breaks or you wish to replace them with more decorative switches, you can often confuse the wires. How to Wire a 3 Way Switch Video If you hook up either one or both of the three way switches incorrectly, they will not operate properly. One switch may turn the lights on and off, while the other switch does nothing. Which Wire is What? Here is how to fix them. The first thing that must be done is to identify the two common or traveler wires.

Find the HOT Wire First Identifying the travelers at each switch is done by finding the continuous hot wire at one switch and then discovering the wire at the other switch that goes to the light fixture. Start by turning off the power to the switch circuit at the circuit breaker. Disconnect all the wires from BOTH switches.

Be sure the wires are NOT touching anything and the bare copper ends are sticking out of the boxes and not touching anything. Using a Voltage Tester Use a voltage tester to find it. Watch this video to see how to use a voltage tester while a wire is HOT: Refer once again to my own video above. Go to the other switch and now find the wire that goes to the light fixture. Take this wire and attach it to the black screw on the switch.

Attach the remaining two wires at each switch to the brass screws. Congratulations on your success!!!!


Dan has been a licensed, journey-level electrician for some 17 years. He has extensive experience in most areas of the electrical trade. Wiring a three way light switch is not a particularly difficult task - there are only 3 connections to be made, after all. Making them at the proper place is a. If you hook up either one or both of the three way switches incorrectly, they will not operate properly. One switch may turn the lights on and off, while the other switch .

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