A crane cannot be within _____ feet of a power line up to 50 KV.

The correct choice is based on safety regulations governing the operation of cranes in proximity to power lines to prevent accidental electrocution and ensure the safety of workers. For overhead power lines rated up to 50 kilovolts (KV), the established safe distance is 10 feet. This distance is critical because electrical arcs can occur even at a significant gap if the crane or load is close enough to the power line.

Safety standards, such as those outlined by the Occupational Safety and Health Administration (OSHA), highlight the importance of maintaining adequate clearance from energized power lines. By keeping at least 10 feet away from the line, crane operators can reduce the risk of contact with the line, thereby protecting personnel and equipment from the dangers associated with high-voltage electricity.

Understanding this guideline is essential for compliance and ensuring safe work environments when operating cranes near power lines.