In order to establish an effective ground-fault current path, impedance must be:

An effective ground-fault current path is essential for ensuring safety and proper functioning of electrical systems. Impedance plays a critical role in this context. When the impedance is low, it allows a higher fault current to flow during a ground fault condition. This high fault current is necessary to trip overcurrent protective devices, such as circuit breakers or fuses, quickly, helping to prevent electrical shock, equipment damage, and fire hazards.

A low impedance path ensures that any fault current can easily flow back to the source, allowing for the rapid detection and isolation of the fault. This characteristic is crucial in maintaining the integrity of the electrical system and safeguarding individuals and property from potential electrical hazards. In contrast, if the impedance were high, it would restrict the current flow, potentially delaying protective device operation and increasing the risk of injury or damage.

This understanding of low impedance as a requirement for establishing an effective ground-fault current path highlights its importance in electrical safety protocols and fault protection design.