What type of resistance is desirable in a grounding system?

In a grounding system, low resistance is essential because it facilitates the safe and effective dissipation of electrical fault currents into the ground. A grounding system with low resistance provides a direct pathway for electrical currents to flow to the earth, reducing the risk of electric shock to personnel and minimizing the potential for equipment damage during fault conditions.

By keeping the resistance low, grounding systems can quickly redirect excess electrical energy and help prevent dangerous buildup of voltage. This is particularly important in the event of lightning strikes or short circuits, where the quick dissipation of energy is critical for maintaining safety and operational integrity.

High resistance, variable resistance, or indeterminate resistance would hinder the effective functioning of a grounding system, potentially increasing the risk of dangerous electrical conditions. Thus, low resistance is a key design goal for grounding systems in any electrical installation.