Wiring a 3-way light switch correctly requires matching specific conductors to the designated terminal screws on the device housing. Every standard 3-way switch features three brass screw terminals and one green grounding screw: a unique "Common" terminal (traditionally colored dark brass or black, usually positioned alone on one end) and two "Traveler" terminals (typically colored light brass side-by-side). The incoming power feed (on the first switch) or the outgoing wire leading to the light fixture (on the second switch) connects to the Common terminal, while the two traveler wires connecting the switch boxes attach to the traveler terminals. You can troubleshoot terminal placement safely by isolating power first. You can verify that your corrective action is successful when restoring power and toggling both switches confirms smooth multi-location operation.
1 votes
Marked as accepted