What size ground is approved for distribution use?

The size of ground wire approved for distribution use is 2/0. This size is recognized for its adequate capacity to handle fault currents and ensure effective grounding and bonding as required by safety standards. Using the appropriate ground size is critical in protecting equipment and ensuring personnel safety by providing a low-resistance path for fault currents to flow to the ground.

Ground wires must be capable of handling electrical load without overheating or failing, and 2/0 copper or its equivalent aluminum size is established in various electrical codes and standards for this purpose. It strikes the right balance between conductivity, flexibility, and mechanical strength, making it suitable for distribution systems.

Other wire sizes may not provide the same level of safety under fault conditions or could be less effective in grounding applications. Hence, the choice of a 2/0 ground wire aligns with the requirements of distribution systems, making it the most suitable and approved size for this use.