What is the minimum distance a tower crane should be from power lines?

The minimum distance a tower crane should be from power lines is determined by safety regulations that aim to prevent electrocution and ensure the safe operation of cranes around electrical hazards. The correct answer indicates that a tower crane must be positioned at least 10 feet away from power lines, plus an additional distance that corresponds to the height of the crane. This guideline is critical because it accounts for the potential movement of the crane and any extension of its boom or load lines, which can inadvertently come into contact with power lines if not adequately distanced.

By emphasizing this safety standard, it reduces the risk of arc flash incidents, which can occur even from significant distances when operating near high-voltage lines. Therefore, the correct answer incorporates both a fixed minimum distance and an adaptable component based on the crane's height, ensuring a safety buffer that takes into account the dynamic nature of crane operations. This approach is essential for protecting workers, nearby personnel, and maintaining the integrity of power lines.