On A 3-way, there’s an additional terminal, called the “widespread.” Power is available in on the switch within the widespread, then two “traveler” wires hook up the primary switch to the next around the brass terminals. For example, the BS 1363 plug is used in the United Kingdom, whilst the https://smart-power-points-and-sw33197.sharebyblog.com/34614476/smart-light-switches-can-be-fun-for-anyone