3-way and 4-way light switches

Two three-way switches are used where you want to be able to turn a light off or on from two locations, such as at each end of a hallway or stair.

A three-way switch has three terminal screws, may have a green grounding screw
and has and no "On" or "Off" markings on the toggle.

A four-way switch has four terminals, may have a green grounding screw and has no markings on the toggle.
It's combined with three-way switches to control lights from three or more different locations.

LIGHTING CONTROLS BUYING GUIDE

MORE ABOUT:
/ Elecrtic panel & circuit breakers / / When lights go out / / Main panel & subpanels /
/ GFCI breakers / / Receptacles / / Switches /

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