3 Way Switch For 2 Way. Most electrical panels label switches for the different rooms in your home. These switches appear externally similar to single pole, single throw (SPST) switches.
The best example of this would be at either end of a long hallway, or at the top and bottom of a stairwell. You know the drill- one turns on the light, the other one will turn off but then the first one wont turn back on unless the other one is switched, etc. One of the most common problems is improper wiring due.
How do three way switches work?
Once you get WiFi setup done, you have to bail from the app or it wants you to setup the second switch on the same circuit.
These switches appear externally similar to single pole, single throw (SPST) switches. Slide your mouse over it to see it change state (requires Javascript enabled): Here is a typical circuit in its four possible states.: The switches must create a complete circuit for current to flow and the bulb to light. This will change the path the electricity can take, and that's how.