The bonding conductor or grounding electrode conductor for radio or television equipment shall be permitted to be which of the following materials?

• A. Copper
• B. Aluminum
• C. Copper-Clad Steel
• D. Any of the above

Answer: (D)

For a bonding or grounding path for radio or TV equipment, the code allows multiple common conductor materials, not just one. Copper is the traditional choice thanks to its excellent conductivity and corrosion resistance. Aluminum is also permitted to reduce weight and cost, provided it is sized and terminated correctly. Copper-clad steel combines a copper surface with a steel core for strength, while still offering adequate electrical conductivity. Because all three materials are allowed, the correct understanding is that any of these can be used for the bonding conductor or grounding electrode conductor, as long as the installation meets sizing, termination, and protection requirements.