What is not permitted for the supply side of an impedance ground system?

In an impedance ground system, the neutrality of the system is critical to its function and safety. The primary purpose of an impedance grounding system is to maintain a way to manage fault currents while also providing a stable reference point for the system. However, connecting a neutral conductor to the supply side of the grounding system undermines this ability and creates potential safety hazards. Specifically, it can lead to unwanted neutral-to-ground connections that can introduce ground loops, create parallel paths for neutral currents, and increase the chances of equipment damage or shock hazards.

In contrast, continuous monitoring, regular testing, and ground fault interrupt testing are all activities that are essential for ensuring the ongoing safety and effectiveness of an impedance ground system. They help in identifying any potential faults or changes in the system's performance, thus maintaining its reliability and safety. Therefore, the connection of neutral conductors to the supply side is not permitted, as it conflicts with the operational integrity of the grounding system.