When you turn on a light switch, power goes to the light through the “hot” (black) wire and then back through the neutral (white) wire to the ground. The bare or green-wrapped ground wires serve as a backup to divert the power safely away in case of an electrical fault.
Does it matter which wire goes where on a 3 way light switch?
A standard 3-way switch features four terminals, each represented by a colored screw. These are the traveler terminals. It doesnt matter which traveler wire (red or black) connects to which traveler terminal as long as its the same in both switch boxes.
Where does red wire go light switch?
Attach the red wire from the light fixture to the nut at the top left of the switch. Connect the bare copper wire to the green nut at the bottom left of the switch. Push both switches into their boxes and secure them with screws at top and bottom.
How do you wire a red wire to a light switch?
Attach the red wire from the light fixture to the nut at the top left of the switch. Connect the bare copper wire to the green nut at the bottom left of the switch. Push both switches into their boxes and secure them with screws at top and bottom. Turn on your power and test the switches.