Florida Home Inspector Practice Test

The correct answer is based on the specifications set forth in the National Electrical Code (NEC), which governs electrical installations, including grounding requirements. According to the code, the minimum size for a copper grounding electrode rod must be at least 5/8-inch in diameter and 8 feet long.

This specification ensures that the grounding electrode rod has sufficient surface area to provide an effective electrical connection with the earth, which is crucial for safety in electrical systems. The larger diameter and length help in the dissipation of fault currents into the ground, thereby protecting both the electrical system and individuals from electrical shocks and other hazards.

The other options presented do not meet these specified requirements: they either have a larger diameter or length than what is necessary for the minimum standards set by the NEC. Therefore, understanding these standards can help ensure that installations are safe and comply with regulations.