How deep must a grounding rod be driven into the ground?

A grounding rod must typically be driven at least 8 feet into the ground to ensure proper electrical grounding. This depth helps to reach a sufficient ground resistance, which is essential for the safe and effective operation of electrical systems. The grounding rod connects electrical systems to the earth, allowing any excess charge or fault current to dissipate safely into the ground, thereby protecting both equipment and individuals from electrical hazards.

Driving the rod deep enough helps to ensure good conductivity with the earth, which can vary based on soil moisture, composition, and temperature. An 8-foot grounding rod is a standard requirement in many electrical codes because it provides a level of grounding that minimizes the risk of shock or electrical fire while ensuring compliance with safety regulations.