A good protective ground would typically have what range of resistance?

A good protective ground should typically have a low resistance. This is crucial because a low resistance ensures that in the event of a fault, the ground system can effectively carry fault current away from personnel and equipment, minimizing the risk of electric shock or equipment damage. The grounding system serves to provide a safe path for excess electrical energy to dissipate into the earth, and higher resistance would impede this flow, potentially leading to dangerous situations.

Low resistance grounding systems are essential for the operation of protective devices, such as circuit breakers and fuses, which rely on the ground system to detect faults and operate correctly. When the ground resistance is low, it enhances the effectiveness of these protective mechanisms, allowing them to trip and isolate faults quickly, thereby protecting both lives and equipment.