4 way switch configurations are used to control lights with three or more switchesa 3 way switch is used on each end with one or more 4 way switches in between the two 3 way switchesthey do not have an onoff position like single pole switches. Most 4 way switch wiring is placed between the wiring of two 3 way switches.
4 Way Switches Electrical 101
How to replace a 4 way switch. Turn off the power to the switch at the circuit panel or fuse box. These 3 way occupancy sensor switches may replace the existing 3 way switches. The sensing pattern should be adjusted as wide as possible and the time delay should be adjusted to provide enough time to travel the full distance of the stairway. 4 way switches are a convenient way to operate lighting fixtures from three or more locations. Unscrew the switch from the electrical box and pull it out with the wires still. You cant just swap the switch without also replacing some wiring.
A 3 way switch is a spdt single pole double throw and only connects to 1 traveler wire. Unscrew and remove the switch plate. To replace a four way switch follow these steps. Install a 4 way occupancy sensor to replace the existing 4 way switch. In this video scott gives you a step by step instructional tour of how to wire and install a pair of 4 way switches in your wood shop. Then use a voltage tester to make sure that the circuit is dead.
Fully explained 4 way switch diagrams. The electrical wiring adds additional wiring to the same principles of 3 way switching. He will also explain how a 3 way circuit works. 4 way switch wiring. It is important to understand how these switches are wired before attempting to troubleshoot or replace.
Gallery of How To Replace A 4 Way Switch
