California Three Way Switch Diagram. A second lamp can be connected at A to light the end of a long corridor. If you have a fancy smart switch then the connections are totally different.
Three-way wall switches control a light fixture from two locations in a room. Find this Pin and more on electricity by Ricardo Guzman. How to control a light from two switches.
The black "hot" wire enters the switch on the left.
A discussion of whether a three-prong outlet should be mounted with the ground pin up or down.
The purpose of the wiring diagram is to provide the student electrician a picture that identifies the connections of each conductor within a device box. They are always installed in pairs and use special wiring connections. Three-way switches allow for controlling a light fixture from two separate locations, these are usually used at the top and bottom of a flight of stairs or at two different entrances to a room.