3-way wiring diagram: Power to the junction box.įrom the above wiring, the supply enters the junction box and connects to the common terminal of the right switch. Note: The neutral (white) wire from the supply moved to the bulb without branching to any switch. We then connected the traveling terminals of the two switches with black and red wires before connecting the second common terminal to the bulb.From the diagram, you can see that we connected the incoming live wire to the common terminal of the first switch.This shows a 3-way light control when the power enters from the switch. Three-way switch wire diagram: power to the switch We also connected the red wire to the common terminal of the first switch, which moves back to the light. Blue and red wires link the traveler terminals for both switches. The hot or black wire connects to the common terminal of the second dimmer.From the diagram, you can see that the power source enters the fixture box.This shows how you can wire a three-way light when the power is coming from the light fixture. In this section, you will see different ways you can wire a 3-way switch 3-way wiring diagram: Power to Light Fixture. Connect the black and red travelers from the first switch to the traveler screws or terminals of the second switch to complete the installation.Ĭonnect the black or hot wire from the second switch to one of the screw terminals, and the white or neutral wire to the second terminal, fix your bulb and test-run your project.Fix the earth wire on the body of the switch box and connect it to the green terminal.Connect the black wire that goes to the lamp holder to the black terminal of the switch.Connect the black and red traveler wires from the NM cable to the brass terminals on the switch.Fix the bare copper or green earth cable to the metal box and connect it to the green terminal.Join the neutral or white wire from the power to the white wire from the NM cable, using a wire nut.Connect the black (hot) cable coming from the power source to the black terminal of the switch.The 3-way switch comes with 4 terminals, the black or common terminal, two brass colour or traveler terminals, and the green screw “earth terminal”. The three insulated conductors are black, red, white, plus the earth wire. The 14-3 cable is a 14 gauge Romex cable with three insulated conductors, plus a ground wire. Feed in your cables.įeed in a lengthy 14-3 NM Romex cable, or 12-3h if you are connecting to a 12-gauge wire. This may be at the entrance and inside of your room, ends of the hallway, staircase, or any place of your choice. Locate the two places you want to mount your switch and install the metal boxes. This is to prevent electrocution and other hazards during the installation. Locate the circuit breaker that controls the branch circuit and turn off the circuit’s power. Whichever way you prefer, installing a 3-way light is easy when you follow our switch wiring procedures. There are three methods, but all depend on whether the hot wire goes to the switch first or the light fixture. Note: Before any electrical installation, ensure that you power off the circuit breaker and also wear your protective glove to prevent electric shock and other hazards. Tools and materials required to wire a 3-way switch. This allows any of the switches to turn on or off the light. When they are opposite, the circuit opens and there will be no light. When the toggles from both switches are up or down, the circuit is complete and the light will be ON. Create your own wiring configuration and experiment with ideas using EdrawMax.5.3.3 What happens if you wire a light switch the wrong way? Components of a three-way switchĪ three-way switch allows you to control a light fixture like other switches, but they do this from two ends. If you do not have time to create a wiring diagram from scratch, you can choose from the thousands of professional templates available in the software. With an array of tools and symbols to create the diagram, beginners and experts can easily use it. If you are planning to wire a three-way switch in your house or are designing an electrical plan for your house, EdrawMax is an excellent tool to help you design it. You can also combine multiple three-way switches to control a single fixture through 2 or more places. It is a very efficient way of monitoring lights and other fixtures from anywhere around the house. This will prevent you from coming back to turn off the light and reduce your electricity bills. You can install the switches at both ends of a long hallway or a flight of stairs so you can turn off the lights when you are at the other end. Three-way switches are extremely helpful around the house. Image / video 16:9 Use EdrawMax for Wiring Diagram Creation
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