On a three-way, there’s an extra terminal, called the “popular.” Power is available in into the switch within the common, then two “traveler” wires link the primary switch to the second to the brass terminals. When both of those common wires are labeled, use a screwdriver to loosen the terminal https://zanderbmqsy.actoblog.com/35475222/smart-power-points-and-switches-an-overview