Which statement best describes the difference between control relays and contactors?

• A. Control relays are used for high-current power switching; contactors are for signaling only.
• B. Contactors are generally used to switch power circuits or relatively high-current loads; control relays switch low-current control circuits.
• C. They are interchangeable in most circuits.
• D. Contactors are used only in motor protection circuits.

Answer: (B)