What is defined as a system that provides protection of equipment from line-to-ground fault currents?

The system that provides protection of equipment from line-to-ground fault currents is referred to as ground-fault protection of equipment. This system is essential in industrial and commercial settings, as it helps to prevent equipment damage and potential hazards that can arise from ground faults. When a ground fault occurs, it means that the electrical current is leaking from its intended path to the ground, posing risks not only to the equipment but also to safety.

Ground-fault protection of equipment is specifically designed to detect these faults and interrupt the power supply before significant damage can occur. This involves the use of relays and circuit breakers that monitor the current flow and can respond quickly to any imbalance caused by a ground fault. By isolating the affected equipment, this system helps maintain operational integrity and safeguards against electrical fires and shocks.

In comparison, while a ground-fault interruption system also relates to safety by disconnecting power when a fault is detected, its primary purpose is often in residential contexts rather than specifically protecting equipment. Other terms like line protection circuitry and electrical safety system are broader concepts that do not exclusively focus on the protection of equipment from line-to-ground faults. Ground-fault protection of equipment, therefore, is the most appropriate term for the system defined in the question.