Lighting contactors are designed by ampere ratings; which rating is not among the typical sizes listed?

• A. 20A
• B. 15A
• C. 30A
• D. 60A

Answer: (B)

Lighting contactors are sized by the current they’re meant to switch, so you pick a rating that matches the load with some margin for inrush and future growth. In industry, the standard ampere ratings for lighting contactors are typically 20A, 30A, and 60A. These sizes cover common lighting loads and give you practical headroom without oversizing too much. A 15A rating isn’t a usual listing for lighting contactors, which is why it isn’t among the typical sizes. When selecting, match the contactor’s rating to the actual load current (and consider a larger size if the load approaches the next available rating) to ensure reliable operation and safety.