What size cable corresponds to ASTM Grade 2 personal protective grounds?

ASTM Grade 2 personal protective grounds are standardized to ensure safety and reliability in electrical work. According to the ASTM specifications, a Grade 2 ground is designed for applications where the maximum fault current may be lower than what a Grade 4 ground would handle. The size of the grounding cable is crucial for its effectiveness in dissipating fault currents safely.

In this context, a 1/0 cable corresponds to the proper size for ASTM Grade 2 personal protective grounds. This size is capable of carrying the necessary current without excessive heating or risk of failure, which is critical in ensuring the safety of personnel working near energized equipment.

Larger sizes, such as 2/0 or 3/0, may be more suitable for higher grade protective grounds, which are designed for more extreme fault current scenarios. A cable size of 2 would typically not meet the requirements for a Grade 2 ground, as it would not provide ample current-carrying capacity for safety.

Therefore, a 1/0 cable is the appropriate selection for ASTM Grade 2 personal protective grounds, ensuring that protective grounding is adequate for the intended application, aligning with safety standards and practices.