How To Install A Light Switch With 3 Wires. Check out our complete guide on how to install a smart light switch. The first step in learning how to install a dimmer switch is choosing the best type for your needs.
Therefore, the instructions moving forward will assume a single-gang smart light switch with a neutral wire, like Wemo's smart light switch. You'll need to replace the first switch with In North American residential wiring, you need three wires to connect multiple switches to a light. Installing and wiring a light switch is not a tough complex.
You don't want to install the switch Here's how a single-pole switch is typically wired: The electrical box usually has two two-wire cables coming into it.
Some electricians fix everything with the power feeding into the top or bottom terminal.
Connect the black power wire to the black terminal. You can connect any number of switches, but. Position the switch in the electrical box so that the ON position is facing up toward the ceiling.