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Installing SwitchLinc Dimmers on 3-Way Circuits
It is important that the Master and Companion switches be installed in the correct locations. The first task is to find the wall box where the electricity comes into the circuit. To do this, you must first turn off the electricity at the breaker box and remove the 3- or 4-way switches from the wall so that the bare copper ends of the wire are left exposed. Each wall box should have three wires sticking out of it. If the circuit is a 4-way or greater, some of the boxes will have four wires. Making sure that none of the wires are touching anything and that no one is around the wall boxes, turn the electricity back on. Using a voltmeter or voltage sensor, individually test each wire for voltage. When 120 volts are measured, mark that wire as LINE, (this wire is usually black). The other two wires, commonly black and red, are the travelers and go to the next wall box. Turn off the electricity to resume installing the new switches. At the wall box where the electricity comes into the circuit, install a SwitchLinc Companion. It is very important that a Companion be installed in this position. The system will not work correctly if a Master SwitchLinc is installed.Step 5: Connect the bare copper ground wire to the other ground wires in the wall box.
If you have a four-way or greater switching circuit, see Special Treatment for Four-Way Circuits at the end of this section.Step 6: Install the SwitchLinc Master in the remaining wall box
There will be two traveler wires from the first box and the wire that carries power from the switch to the lights; we call this the LOAD. The travelers can sometimes be easily recognized, because those two wires are covered by the same cable sheath or covering around the wires. The wires can also be identified by the same method described earlier: turn on the power (taking the same precautions), and use a voltmeter to find the wire with electricity. The wire with electricity is the LINE wire.Continue with the connections below... make sure the power is turned off!!!
Connect ground wires using the same instructions given above for the companion switch.Special Treatment for Four-Way Circuits
If your lighting circuit includes more than two switches controlling a set of lights, some wall boxes will have four wires. Two of these wires are coming from the wall box where the power enters the circuit (see Step 1 above), and the remaining wires connect through to the master SwitchLinc's location (see Step 6 above). In this center position, install another SwitchLinc Companion Switch.