Which of the following actions is essential when removing a ground-end clamp?

Ensuring that the ground-end clamp is not under load is critical because it directly relates to the safety of the procedure. Ground-end clamps are used to provide a safe path for fault currents to flow into the ground, thus preventing electrical hazards. When a clamp is under load, removing it could inadvertently create a situation where a fault or an electrical surge can occur, potentially leading to serious injury or damage to equipment.

By confirming that the clamp is not under load before removal, the risk of electrical shock or arc flash is significantly reduced, ensuring that the worker can proceed safely. This action is a part of standard safety protocols that prioritize risk management in electrical work environments. Therefore, this check is not only a practical step but also a fundamental safety requirement in electrical maintenance.