What is the minimum required length for a ground ring electrode?

The minimum required length for a ground ring electrode is 20 feet. This requirement is established to ensure that the grounding system has sufficient surface area in contact with the earth to effectively dissipate electrical faults and provide a reliable path for fault currents. A ground ring electrode, which consists of a continuous loop of conductive material that encircles a structure, is designed to enhance grounding effectiveness and reduce ground resistance.

Using a length of 20 feet helps meet the grounding requirements outlined in applicable electrical codes, ensuring safety and reliability in electrical systems. Ensuring the minimum length is critical, as a shorter ground ring may not provide adequate grounding, thereby increasing the risk of electrical hazards.