What is the smallest size conductor allowed for a ground ring?

For a ground ring, the smallest size conductor allowed is based on the requirements set forth in the National Electrical Code (NEC) and other relevant electrical standards. In most cases, a ground ring is typically made from a minimum of 2 AWG copper in order to ensure adequate conductivity and provide a low-resistance path to ground. This is essential for safety, particularly in reducing the risk of electrical shock and ensuring effective operation of overcurrent protection devices.

Using 2 AWG copper ensures that the ground ring can handle potential fault currents without overheating or becoming ineffective in its grounding capacity. While larger conductors may be acceptable, 2 AWG serves as the minimum standard that meets the NEC guidelines for grounding applications involving ground rings.

Conductor sizes smaller than 2 AWG, such as 4, 6, or 10 AWG, would not provide the necessary current-carrying capacity or conductivity needed for effective grounding and could pose safety risks in the event of a fault. Therefore, 2 AWG copper is the appropriate choice for compliance with grounding requirements.