How to Wire a Relay or Contactor Coil and Contact

Every contactor has 3 essential parts and knowing them helps you install, troubleshoot, and select the right one. 1. Coil It’s the control center. When energized, it magnetically activates the contactor and switches power ON or OFF. 2. Contacts These handle the real work. They open or close the electrical circuit to control motors, HVAC systems, or lighting. 3. Terminals Your connection points for line and load wiring. Precision here means safe, reliable performance. At Contactor Depot, we help