What is one method of protecting workers from step touch potential?

The correct method of protecting workers from step touch potential involves using non-conductive mats. This method works effectively in preventing electric shock caused by step-and-touch potential, which occurs when a person stands on a conductive surface and the voltage potential difference exists between their feet or between their feet and another point. Non-conductive mats provide insulation, minimizing the risk of electrical current passing through a worker's body and reducing the potential for injury from electric shock.

While grounding vehicles, whether individually or together, can provide some level of safety in specific contexts, they do not specifically address the immediate risk of step potential on the ground in a work area. Setting up barriers can help control access to hazardous areas but does not directly mitigate the risk of electrical shock caused by step-and-touch potential. Non-conductive mats are specifically designed to protect workers by insulating them from ground faults and stray voltages, making them the best option in this scenario.