
Print the wiring diagram off and use highlighters to trace the routine. The white wire of the cable going to the switch is attached to the black line in the fixture box using a wire nut. With these diagrams below it will take the guess work out of wiring. It shows the components of the circuit as simplified shapes, and the skill and signal friends along with the devices. Turn the power off at circuit breaker the first step in any electrical project is to make sure there is no power going to the circuit you plan to be working on.
#3 way smart switch wiring diagram how to#
Each part ought to be set and connected with other parts in specific way.īelkin Official Support How To Install Your Wemo Wifi Smart 3 Way Light Switch Wls0403 In A 4 Way Configuration from The green ground lead attaches to the switch box ground wire, the red and white travelers are attached to the pair of red leads and the black lead is connected to the power or switch leg connected at the fixture (s). The common terminal of the second switch sends the black wire to the light fixture.Three Way Switch Wiring Diagram. The charged black wire connects to the common terminal of the first switch and is then carried by paired travelers to the paired terminals of the second switch.

The white wire, connected by wire nuts in each switch box, is continuous from the source to the light fixture. In this configuration, the power enters the first switch, and the light fixture is placed after the second switch. Three-way switch wiring where power goes directly to the light.Ĭ) The wires from the power source go from switch to switch, and then go to the light. Red and black travelers then connect the paired traveler terminals on both switches. The black wire connects to a taped white wire that passes through the first switch box and connects to the common terminal on the second switch. In this configuration, the inbound white wire connects directly to the light fixture. Three-way switch wiring where power connects to first switch and then the light.ī) The wires from the power source may enter the light fixture box first, travel from there to one switch, and then connect that switch to the other switch. Note in this illustration that the inbound white wire travels through the first switch box and terminates at the light fixture. Please note: All switches that have a green grounding screw or wire must be grounded to the metal electrical box or to the circuit’s bare or green ground wire.Ī) The wires from the power source may enter one switch box first, then travel to the light, and then terminate at the other switch.

The right one for you will depend upon where the power enters the circuit (at one of the switches or at the light fixture), and the placement of the switches and lights.


There are three basic ways three-way switches may be set up to control one or more lights. For this reason, the white wire is painted or taped black to identify it as a black (hot) wire when the cable is used to connect two three-way switches and lights. This type of cable contains a white wire that needs to serve as a black wire. Because “3-wire-with-ground” nonmetallic electrical cable such as Romex is often used to wire switches, a slight modification is often made during installation.
