What is the minimum size of a copper grounding electrode conductor for a television antenna?

The minimum size of a copper grounding electrode conductor for a television antenna is determined by the National Electrical Code (NEC) requirements, which specify the appropriate conductor size based on the application to ensure safety and effective grounding. For a television antenna, which is typically classified under antennas needing specific grounding due to their exposure and potential risk of lightning strikes, the NEC outlines that the conductor should generally be at least 10 AWG if it's made of copper.

Choosing a conductor that meets the minimum size specification is crucial. It ensures that the grounding system can adequately handle potential fault currents that could arise from a lightning strike. Sizing the conductor improperly could lead to insufficient grounding, increasing the risk of equipment damage or safety hazards.

The other options propose sizes that do not align with NEC guidelines for this specific application, as they are either too large or too small for the necessary effectiveness and safety that's required for grounding a television antenna.