NEO38 RTP SLOT By correctly connecting two of these switches together, toggling either switch changes the state of the load from off to on, or vice versa. This is useful in long hallways that may need more than one light to be controlled by the two switches, and which may also have receptacles needing unswitched power as well as the switched lights. The electrical load may be permanently hard-wired, or plugged into a switched receptacle. An intermediate switch can, however, be implemented by adding appropriate external wiring to an ordinary (six terminal) DPDT switch, or by using a separate DPDT relay. Wikimedia Commons has media related to Multiway switching diagrams.|Lou Dobbs Tonight