1. ECE 2011 3-Way Switch Design Changing the position of either switch will change the state of the lamp. Applications might include hallways, staircases, or rooms with two entrances/exits.

2. ECE 2012 4-Way Switch from a DPDT Switch

3. ECE 2013 4 3 1 2 3 4 Contact Connections

4. ECE 2014 Hard-Wiring of the 4-Way Switch Position 1 Position 2 ToggleAdded

5. ECE 2015 4-Way Switch Design Changing the position of any switch changes the state of the lamp. Applications might include the front entrance light for a split-level home. The light can be switched on or off from the top or bottom of the staircase, or at the landing.