What is the primary reason for using grounding in electrical systems?

Grounding in electrical systems serves a crucial safety function, primarily aimed at preventing electric shock. When electrical systems are grounded properly, any fault in the system that causes an exposed conductive part to become energized will create a path for electrical current to flow directly to the ground. This significantly reduces the risk of electric shock to individuals who may come into contact with these energized parts.

Grounding also helps to stabilize voltage levels in the system and provides a reference point for electrical currents, thus enhancing safety. It directs fault currents safely away and helps ensure that protective devices, like circuit breakers or fuses, operate effectively to disconnect affected circuits in the event of a fault. This protective measure is essential for the safety of both users and equipment in any electrical installation.

While other options may address different aspects of electrical systems—like performance enhancement or cost reduction—they do not hold the primary focus of grounding, which is fundamentally about safety from electric shock.