3 Way Light Switch Wiring With Neutral. The other 3 wire cable originates at the second switch box and will become the switch leg. The circles are wire nuts.
The top is the before. Red and blue wires link traveler terminals of both switches. Connect the load wire from the wall to the red load wire on the c by ge smart switch.
Three way switches require a three wire cable.
The easiest way to determine if you have a neutral wire in your light switch box is to look but here are a few clues if you don t feel like doing that just yet. Cap the second traveler wire from the wall. Dotted lines are boxes. At the load switch box the black wire of the two wire load cable gets connected to the copper or black terminal on the three way switch.