An equipotential zone minimizes the voltage difference between the worker's contact point and which part of their body?

An equipotential zone is designed to create a uniform electrical potential within a specific area to minimize the risk of electric shock. By ensuring that there is no significant voltage difference between different parts of the body and the contact point, the risk associated with stepping on or standing near energized equipment is reduced.

When a worker is in an equipotential zone, the voltage differences between the worker's contact point (often the feet when they are standing) and any other point on their body are minimized. This is crucial because if a worker's feet are at a different potential than their hands or torso, it can lead to a dangerous electrical current flowing through their body, which can cause serious injury or death.

By focusing on the feet—the primary point of contact with the ground—an equipotential zone ensures that the worker is protected from potential differences that could lead to an electrical shock. The other areas of the body, while important, are secondary when evaluating the primary point of contact and potential shock risk.