Electrician Red Seal · Question
Which of the following protective devices is primarily intended to protect a control circuit from overcurrents due to a fault, rather than protecting the motor itself?
A control circuit fuse (or control circuit breaker) is specifically designed to protect the conductors and components within the control circuit itself from ove
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Question: Which of the following protective devices is primarily intended to protect a control circuit from overcurrents due to a fault, rather than protecting the motor itself?
Answer options:
- Thermal overload relay.
- Branch circuit breaker. ✅ Control circuit fuse.
- Ground fault circuit interrupter (GFCI).
Correct answer: Control circuit fuse.
Explanation: A control circuit fuse (or control circuit breaker) is specifically designed to protect the conductors and components within the control circuit itself from overcurrents, such as those caused by shorts or overloads within the coil, pushbuttons, or auxiliary contacts. Thermal overload relays protect the motor, branch circuit breakers provide overall branch protection (including motor if sized correctly), and GFCIs protect against ground faults and shock hazards.
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