Understanding three-way wall switches, electrical wire colors, and what they actually mean.
There are three types of wall switches.The single-pole switch is the most common type used to control a light fixture.The three-way switch is the next most common.You can arrange switches to control light fixture from multiple locations with the four-way switch.
Three-way switches are used to control a light fixture.A long hallway or stairway might use a pair of three-way switches at each end so that lights can be turned on when approaching one end of the hall, then shut off from the other end.
The circuit is complete and the light fixture will illuminate when the two toggles are up or down.The circuit is interrupted when the toggles are in different positions.The on-off function of the light fixture can be controlled by either switch.
The green screw on the metal strap of the switch is used for the ground wire.If you are replacing an old three-way switch, you may find one without a ground screw.
The traveler screws are lighter in color.Two different pathways for power to travel from one switch to the other are offered by the travel wires connected to these screws.There are some switch brands in which the traveler screws are on the same side of the switch.