On a three-way, there’s an additional terminal, called the “common.” Power comes in for the switch on the common, then two “traveler” wires hook up the 1st switch to the 2nd within the brass terminals. For example, the BS 1363 plug is used in the United Kingdom, whilst the Schuko https://rivermimtx.myparisblog.com/35360974/the-smart-trick-of-smart-power-point-that-no-one-is-discussing