Which of the following is considered the best example of an equipment ground?

The best example of an equipment ground is the driven electrode with a resistance value of 5 Ohms. This option represents a dedicated grounding system that is specifically designed to provide a low-resistance path to the ground, which is critical for safety and performance in electrical installations. A resistance value of 5 Ohms is quite low, indicating that the electrode can effectively carry fault currents to the ground, which helps to prevent hazards such as electric shock or fire that can occur if electrical faults were to happen.

In contrast, while a grounding bracelet might serve a purpose in certain settings, a resistance of 1500 Ohms is too high to be considered effective for equipment grounding, as it would not efficiently divert fault currents. The buried cable, with a resistance value of 26 Ohms, is also not as effective as the driven electrode because it does not provide as reliable a grounding path. Finally, the plastic water pipe, having infinite resistance, does not serve as a grounding option at all, as it is an insulator rather than a conductor. Grounding must involve low resistance to ensure safety and to protect electrical equipment from fault conditions, which is why the driven electrode is the best choice.