On a three-way, there’s an extra terminal, called the “popular.” Power comes in into the switch around the popular, then two “traveler” wires connect the primary switch to the next about the brass terminals. Once the switch is on, electricity flows through the switch in the inbound wire into the https://andersonqkcef.collectblogs.com/79577066/smart-power-points-and-switches-no-further-a-mystery