What danger does a worker face when standing near a truck that accidentally makes electrical contact?

When a worker is standing near a truck that accidentally makes electrical contact, the most significant danger they face is step potential. Step potential occurs when there is a voltage difference between the feet of a person standing on the ground, creating the possibility of an electric shock. This situation can arise if the truck becomes energized and the electrical current seeks a path to ground. As the voltage spreads out from the point of contact, the area around the truck can create a gradient in electrical potential, putting anyone standing nearby at risk if they are not properly grounded.

Understanding step potential is crucial for workers in environments where electrical hazards exist, as it highlights how electricity can affect individuals even if they are not directly touching the source of the power. In contrast, while electric shock and hazards associated with disconnection from a power source can occur, the specific risk in this scenario emphasizes the dangers associated with step potential. Fall hazards, while important, are not directly related to the electrical contact itself and represent different types of safety concerns.