Which option is NOT a purpose of a grounding electrode?

The purpose of a grounding electrode revolves around safety and system reliability within electrical installations. Grounding electrodes are crucial for providing paths for electrical surges, which helps in dissipating excess voltage that could otherwise damage equipment or pose a danger. This is especially important during events such as lightning strikes or power surges.

Preventing electrical shock is another vital role of grounding electrodes. By ensuring that any fault currents have a safe path to the ground, it reduces the likelihood of electric shock to individuals who might come into contact with electrical systems. Additionally, they serve to provide a common reference point for the electrical system's potential, which is crucial for the proper operation of protective devices and monitoring equipment.

The incorrect choice, which indicates that grounding electrodes are used to directly power electrical systems, does not align with their fundamental purpose. Grounding electrodes are not involved in the distribution of electrical power; rather, their role is centered around safety and protection from electrical faults and surges. Thus, while grounding electrodes are integral to electrical safety measures, they do not serve as a source of power supply, highlighting why this option stands apart from the others.