Why is a solidly grounded system typically preferred?

A solidly grounded system is typically preferred because it offers a low impedance path for fault currents. This low impedance is crucial in the event of a fault, as it allows for rapid fault-clearing. When a fault occurs, the grounding system quickly directs the fault current back to the ground, which enables protective devices, such as circuit breakers or fuses, to operate effectively and disconnect the faulty circuit. This helps maintain safety and protects equipment from damage due to overcurrents.

Additionally, the low impedance path helps stabilize the voltage during normal operation and ensures that neutral currents and unbalanced loads do not result in voltage fluctuations that can affect equipment performance. The reliable grounding provided by a solidly grounded system is essential in helping prevent electrical shock hazards, and it prevents the buildup of hazardous voltages in the electrical system.

Other options may imply certain benefits but do not address the primary reason for preferring a solidly grounded system. While minimizing installation costs or reducing equipment requirements can be beneficial in some contexts, they do not emphasize the critical safety and operational effectiveness that a low impedance path provides during fault conditions.