Which of the following is a requirement for circuit protective devices in electrical systems?

The requirement for circuit protective devices in electrical systems emphasizes the importance of manual operation to restore service after an interruption. This is vital for ensuring safety and control during the restoration process. When a circuit protective device—such as a circuit breaker—trips due to an overload or fault, manual operation ensures that a technician or user can assess the situation, check for any lingering issues, and confirm that it is safe to restore power. This added layer of safety is crucial in preventing further damage or hazardous situations that may arise if power were restored automatically.

While automated features, such as reset capability or remote monitoring, can enhance convenience and operational efficiency, they do not replace the fundamental need for manual control when addressing circuit interruptions. Integrated surge protection may also be important in certain contexts, but it is not a standardized requirement for all circuit protective devices. Hence, manual operation remains a key principle in safeguarding electrical systems and maintaining operational reliability.