What is the minimum acceptable diameter for copper clad ground rods used on Class II structures according to UL 96A?

The minimum acceptable diameter for copper clad ground rods used on Class II structures, according to UL 96A, is indeed 5/8 inch. This specification is important because it ensures that the ground rod provides adequate conductivity and structural integrity, which are critical for effective lightning protection.

Ground rods serve as a connection to the earth, allowing any lightning strike to safely dissipate into the ground. The diameter of the rod is essential in determining its resistance to earth current. A rod that is too small may have a higher resistance, which can impact the overall effectiveness of the lightning protection system.

Choosing a 5/8 inch diameter strikes a balance between physical strength and adequate electrical performance for a Class II structure. Larger diameters could be used for other applications or Class I structures, but for Class II, 5/8 inch is the standard that meets safety codes and performance requirements.