On A 3-way, there’s an extra terminal, known as the “widespread.” Power is available in to the switch on the prevalent, then two “traveler” wires hook up the first switch to the next to the brass terminals. DIYers mustn't, however, attempt managing new wiring on their own—that’s a career for https://shanerkbre.blogunok.com/34971833/wiring-to-lights-an-overview