When more than one rod, pipe or plate electrode is used in one grounding electrode system, each electrode shall be located a minimum of how many feet from any other electrode of another grounding system?

In a grounding electrode system, the required distance between multiple grounding electrodes—such as rods, pipes, or plates—is set to ensure their effectiveness and to reduce the risk of interference or performance issues between them. The correct answer of six feet reflects guidelines established to enhance the system's overall grounding capability. By spacing the electrodes at least six feet apart, this approach minimizes the potential for interaction that can arise due to earth resistivity variations and enhances the dissipation of fault currents into the ground.

Maintaining proper spacing between the electrodes allows each electrode to function independently, thereby maximizing their individual grounding efficiency and ensuring compliance with safety standards. This configuration aims to provide better grounding reliability, especially in the event of a fault, as it helps prevent any single electrode's performance from adversely affecting others within the system.