One method of worker protection from step touch potential is to do what?

Grounding all vehicles together is an effective method of protecting workers from step touch potential. When vehicles are bonded and grounded, it helps to equalize the electrical potential across the surfaces of the vehicles. This means that if a fault occurs, and a vehicle becomes energized, the risk of differential voltage between the vehicle and the ground—leading to step voltage hazards—is minimized. Workers who might be in proximity to grounded vehicles will have a reduced risk of electrical shock, as there is less chance of a voltage difference that could lead to the flow of electric current through their bodies.

The other options do not effectively address the risk of step touch potential. For instance, grounding all vehicles individually may create different potentials between each vehicle, leading to a dangerous situation. Keeping vehicles away from power lines is a good safety practice but does not directly mitigate risks associated with step touch potential. Using rubber tires is a common misconception; while rubber does provide some insulation, it does not eliminate the risks associated with electrical faults if a vehicle is in the vicinity of energized equipment.