KeypadLinc Schedule Timer Owner’s Manual
Page 7 of 26
Installing KeypadLinc Schedule Timer in a Multi-Way Circuit
Understanding Multi-Way Circuits
If more than one switch controls a single set of lights (called a load), the switches are part of a multi-way
circuit. A 3-way circuit uses two switches to control a load, a 4-way circuit uses three switches, and so
forth. Most homes have one or more 3-way circuits, with two switches located in hallways, stairwells, or
two different entrances to a room. Less commonly found are circuits that are 4-way or above.
Here is how a typical wired-in 3-way circuit (with two switches) works:
A wired-in 4- or more-way circuit (with three or more switches) has additional switches added in the
middle of the circuit. In the 4-way diagram below, the additional switch (Switch 3+) is shown in two
different positions, since wiring can vary from home to home.
