3 Way Lamp Switch Wiring Diagram. Intermediate switch An intermediate switch is a three way light switch. The red wire in the cable is known as the traveler, and it connects to the black terminal screws on the pair of switches.
The red wire in the cable is known as the traveler, and it connects to the black terminal screws on the pair of switches. There are several possibilities depending on where the power source enters the circuit. Three-way light switches control a light from two locations, such as from both ends of a staircase or hallway.
ALWAYS photograph switch wiring before removing old switch, so mapping to new switch is easier.
Three-way light switches control a light from two locations, such as from both ends of a staircase or hallway.
Don't disconnect old switch before you are certain about the wiring. The red wire in the cable is known as the traveler, and it connects to the black terminal screws on the pair of switches. They are always installed in pairs and use special wiring connections.