Page 6 of 19 2478D - Rev: 1/21/2014 7:32 AM
Installation – Circuit with 2 Switches (3-way)
Circuits with 2 switches are called 3-way circuits. Both switches in a 3-way circuit need to be replaced by
SwitchLincs (and/or KeypadLincs).
Note: 3-way circuits require a pair of wires called Travelers between joining wall boxes to operate.
INSTEON switches, dimmers and keypads do not require both Traveler wires for 3-way circuits to
function. Simply wire one to Line, Neutral and Load; the other(s) to Line and Neutral. Use one Traveler to
share Line between boxes. Adding both SwitchLincs to a Scene creates a virtual 3-way circuit.
1) Turn off circuit breaker(s) and/or remove fuse(s) feeding wall boxes
2) Use a voltage meter to verify that power is off
3) Pull both switches from their wall boxes, each existing 3-way switch will have no less than 3 wires
4) Remove wires from existing switches
5) Make sure wires are safely separated from each other and turn breaker(s) back on
6) Using a voltage meter measure each wire to Ground in both boxes until you find the single wire
supplying 100 - 277VAC (Line)
a. We will now refer to that location as box 1
b. The other box will have the Load wire. That will be box 2
7) Turn breaker(s) back off
In Box 1 (Line box)
8) Connect bare Ground wire from the
SwitchLinc to bare Ground wire or Ground
screw in wall box
9) Connect White Neutral wire from SwitchLinc
to Neutral wire(s) in wall box (usually white)
10) Using a wire nut, cap the Red wire from
SwitchLinc
11) Connect Black wire from Switch Linc to 100 -
277VAC Line wire in wall box (usually Black)
along with one Traveler wire running between
boxes (preferably Black). Note color of
Traveler you are using as this will carry Line
voltage to box 2.
12) Cap unused Traveler
In Box 2 (Load box)
13) Connect bare Ground wire from
SwitchLinc to bare Ground wire or
Ground screw in wall box
14) Connect White Neutral wire from
SwitchLinc to Neutral wire(s) in wall
box (usually White)
15) Connect Red wire from SwitchLinc to
Load wire (usually Black)
16) Connect Black wire from SwitchLinc to
same color Traveler from box 1
carrying 100 - 277VAC Line (usually
Black)
17) Cap unused Traveler wire
18) With the LED bar on the left, gently
place both SwitchLincs into the
junction boxes and screw in place
19) Turn breaker(s) On
