+18 3 Wiring Light Switch With Only 1 Black Wires Ideas. The black hot wire connects to the far right switch’s common terminal. If the old switch does not have on/off marked in the handle and it has three terminals it is a three way switch.
There are a few different ways to wire a single pole switch with three wires. Red and blue wires link the traveler terminals of both switches. Web again, the black (switch wire) wire would normally have a red tape or sleeve indicating that it is a live circuit and not neutral.
