On A 3-way, there’s an extra terminal, known as the “common.” Power comes in on the switch over the typical, then two “traveler” wires link the very first switch to the 2nd over the brass terminals. HomeTips articles or blog posts could contain one-way links to Amazon.com as well as https://troyxyelp.thenerdsblog.com/40607582/the-best-side-of-safe-electrical-wiring