On A 3-way, there’s an extra terminal, called the “widespread.” Power is available in for the switch about the prevalent, then two “traveler” wires join the 1st switch to the 2nd on the brass terminals. The switched Dwell wire can be wholly purple, have a piece of pink sleeving above https://zaneljgcv.fitnell.com/75597796/safe-electrical-wiring-options