Or flip a switch at the bottom of the stairs, and then again at the top. The next person, coming from either direction, must ...

A normally closed (NC) rocker switch has contacts that are closed or connected in their unactuated (normal) position. ON/OF rocker switches have separate ON and OFF functions and work like light ...

Configurations for maintained-contact toggle switches are described below. ON/OF toggle switches have separate ON and OFF functions and work like light switches. Three-position toggle switches have a ...