Which factor is NOT part of the checklist before energizing the overhead trolley?

The correct choice is based on the operational safety protocols related to overhead trolley systems. Before energizing the overhead trolley, key considerations are primarily centered around functionality, safety, and the presence of personnel in the vicinity.

The factor involving whether the trolley is properly painted does not directly influence the immediate safety or operational integrity of the trolley at the moment of energization. While maintaining the paint on equipment can have implications for visibility and long-term maintenance, it is not a critical factor to assess immediately prior to energizing the system. The presence of paint, or the lack thereof, does not actively impact the safe operation of the trolleys or indicate readiness for energization.

In contrast, evaluating whether the trolley is connected to a car, if someone is using it, and ensuring that its location is secure are directly related to active safety measures. These factors ensure that there will be no unintended consequences or accidents when the trolley is energized, such as electric shock to personnel or damage to equipment. Each of these points contributes to a comprehensive safety checklist before introducing electrical power to the trolley.