Contactors are rated according to the maximum amperage through the:

Contactors are rated according to the maximum amperage through the:

• A. Coils
• B. Contacts
• C. Terminals
• D. Wiring

Answer: (B)

Contactor ratings reflect the maximum current that can pass through the load-carrying contacts safely. This current determines heating, wear, and the ability to switch the load without the contacts degrading or welding shut. The coil current is separate—it powers the magnetic field to pull the contacts, but it does not define the contactor’s amperage rating. Terminals and wiring have their own installation ampacity, but the official rating of the device is about the current through the contacts themselves. So the maximum amperage through the contacts is what determines the rating.

Contactor ratings reflect the maximum current that can pass through the load-carrying contacts safely. This current determines heating, wear, and the ability to switch the load without the contacts degrading or welding shut. The coil current is separate—it powers the magnetic field to pull the contacts, but it does not define the contactor’s amperage rating. Terminals and wiring have their own installation ampacity, but the official rating of the device is about the current through the contacts themselves. So the maximum amperage through the contacts is what determines the rating.