Which method is NOT used to protect workers when high earth voltage is anticipated in a work area?

In the context of protecting workers in areas where high earth voltage is anticipated, the method that does not contribute to worker safety is the incorporation of a ground wire. Ground wires are essential for diverting excess voltage away from equipment to prevent damage or malfunction, but they do not specifically protect workers from high voltage during their work activities.

The other methods listed play a crucial role in worker safety. Developing an equipotential zone helps ensure that all parts of the work area are at the same voltage level, minimizing the risk of electric shock. Insulating provides a barrier that prevents the flow of electric current, protecting workers from live conductors. Isolating involves ensuring that equipment is de-energized and secured, providing a safe environment free from the risk of accidental contact with high voltages.

Thus, the choice of incorporating a ground wire, while important in the overall electrical safety infrastructure, does not directly protect workers from the risks associated with high earth voltage in the same way the other methods do.