Which characteristic must all mechanical elements used to terminate a grounding electrode conductor possess?

A fundamental requirement for grounding electrode conductors is that all mechanical elements used for their termination must be accessible. This accessibility is crucial because it allows for regular inspection, maintenance, and testing of the grounding system to ensure its effectiveness in providing a safe path for electrical fault currents.

Accessible terminations facilitate the ability to verify proper connections, integrity, and compliance with safety standards. Such provisions are essential for the long-term reliability of the grounding system and to ensure that it can perform its protective functions effectively.

While insulation, metallic composition, and rust-proof qualities can be important considerations in specific contexts, they do not universally apply to all mechanical terminations for grounding electrode conductors. Therefore, ensuring accessibility takes precedence as a critical characteristic in the installation and maintenance of these components.