For ASTM Grade 4 personal protective grounds, what size cable is expected?

The expected size of cable for ASTM Grade 4 personal protective grounds is 3/0. This size is specified based on its capability to safely conduct fault currents during protective grounding operations.

ASTM Grade 4 personal protective grounds are required to handle specific fault current ratings, which determine the necessary cable sizing to ensure effective protection for workers during electrical maintenance or emergencies. The 3/0 cable strikes a balance between flexibility, resistance to physical wear and tear, and adequate current-carrying capacity for the tasks associated with this grade of grounding.

Other sizes, while they may be common in use, do not meet the specific requirements outlined for ASTM Grade 4 in terms of capacity or safety considerations. Selecting the correct gauge is critical for both the protection of personnel and the effective operation of grounding systems.