What might cause nuisance shocks to workers touching vehicles?

Capacitive-coupled voltage from energized lines can lead to nuisance shocks when workers touch vehicles. This phenomenon occurs when a non-energized object (like a vehicle) is in close proximity to energized equipment, such as power lines. The electric field generated by the energized lines can induce a voltage in the vehicle through capacitive coupling. When a person touches the vehicle, they can complete a circuit, allowing the induced voltage to flow through their body, resulting in a shock sensation.

This type of shock is often mild and is characterized as a nuisance because it can occur without direct contact with a live electrical source, potentially leading to discomfort and distraction but not necessarily indicating a significant electrical hazard. Understanding this concept is vital for workers to recognize the importance of proper grounding and maintaining safe distances from energized lines, especially in industrial environments.