Ground rods shall be made of copper-clad steel, solid copper, hot-dipped galvanized steel or stainless steel. True or False?

• A. True
• B. False
• C. Not specified
• D. Depends on site

Answer: (A)

Ground rods are grounding electrodes that must resist soil corrosion while providing good electrical conductivity over time. The materials listed—copper-clad steel, solid copper, hot-dipped galvanized steel, and stainless steel—are all standard, acceptable choices for ground rods. Copper-clad steel combines a strong steel core with a copper outer layer for good conductivity and corrosion protection; solid copper offers excellent conductivity and long-term corrosion resistance; hot-dipped galvanized steel provides a durable zinc coating on steel for corrosion protection in many soils; stainless steel delivers very high corrosion resistance and longevity in challenging environments. These options are widely recognized as suitable grounding electrode materials in practice and standards, so the statement is true. Selection among them depends on soil conditions, cost, and installation considerations, but all four are acceptable.