Ground clamps and fittings that are exposed to physical damage shall be enclosed in _____ or equivalent protective covering.

• A. A listed enclosure
• B. Cabinet
• C. A listed enclosure or equivalent protective covering
• D. Conduit body

Answer: (C)

Protecting the bonding path from physical damage is the key idea. Ground clamps and fittings that could be hit or damaged must be inside a protective housing so the grounding connection remains intact. The NEC allows either a listed enclosure or an equivalent protective covering, meaning the device used must be a listed enclosure or another covering that provides the same level of protection as the listing. A listed enclosure guarantees the protection has been tested for the intended abuse, while an equivalent protective covering must offer the same protection characteristics as the listed option. In practice, simply using a generic cabinet or a conduit body isn’t enough unless it is a listed enclosure or an approved protective covering; the cabinet must be listed for this use, and conduit bodies aren’t meant to serve as a protective enclosure for ground clamps. This combination of options—listed enclosure or equivalent protective covering—best satisfies the requirement.