Ground clamps are selected based on what ASTM standard?

The correct choice is based on the standards set by ASTM (American Society for Testing and Materials) that specify the requirements for ground clamps. The ASTM F855 standard deals specifically with the mechanical properties and testing methods for metallic grounding clamps. This makes it the relevant standard for ensuring that ground clamps are suitable for use in electrical installations by confirming their performance and reliability under various conditions. Understanding the specification ensures that the chosen ground clamp will perform effectively to provide safety and proper grounding in electrical systems, which is essential for preventing electrical faults and ensuring the safety of both people and equipment.