What is the minimum safe operating distance to a powerline energized with 17.2kV?

• A. 10 feet
• B. 8 feet
• C. 12 feet
• D. 15 feet

Answer: (A)

For a crane operating near overhead power lines, the distance is set to prevent an electrical arc from reaching the equipment. Voltages that are 50 kV or less have a standard minimum clearance of ten feet. Since 17.2 kV falls below that threshold, the minimum safe operating distance is ten feet. This buffer helps account for any movement, sway, or misjudgment that could bring the crane or its load toward the line, and it remains a safer baseline even under varying weather conditions. Distances like eight feet would be too close for this voltage, while twelve or fifteen feet are more conservative and typically used for higher voltages or stricter site rules. If possible, de-energizing the line or using appropriate barriers is also a best practice to enhance safety.