On a three-way, there’s an extra terminal, called the “frequent.” Power is available in for the switch around the widespread, then two “traveler” wires hook up the main switch to the second to the brass terminals. After both common wires are labeled, use a screwdriver to loosen the terminal screws https://safeelectricalwiring64216.blogdeazar.com/34946591/5-essential-elements-for-wiring-systems