To reduce current through a single ground rod, how should additional driven grounds be spaced?

The principle behind this question involves grounding systems and their effectiveness in dissipating electrical current into the earth. When additional ground rods are installed to reduce the current that passes through a single ground rod, the intention is to enhance the overall grounding effectiveness by minimizing the ground resistance.

By spacing the additional ground rods a distance equal to at least one ground rod length apart, the grounding system is able to significantly reduce the cumulative resistance. This is because spaced ground rods form a more extensive conducting path to the earth, which allows the system to disperse electrical charges more efficiently. If ground rods are positioned too close to one another, the area they effectively cover does not increase enough to lower the resistance significantly.

Choosing a distance of one ground rod length creates an arrangement where each rod can perform optimally and contribute equally to lowering the overall ground resistance. Therefore, spacing additional ground rods this way ensures improved performance of the grounding system, allowing it to manage fault currents more effectively while adhering to grounding standards and practices.