What is the minimum clearance between the wires and any part of the crane or load for lines rated 50 kV or below?

What is the minimum clearance between the wires and any part of the crane or load for lines rated 50 kV or below?

• A. 5 feet
• B. 8 feet
• C. 10 feet
• D. 12 feet

Answer: (C)

Minimum clearance from overhead power lines to any part of the crane or its load is ten feet for lines rated up to 50 kV. This safety buffer is used because electricity can arc through the air if a crane arm or lifted load gets too close, even without direct contact. The ten-foot distance provides a practical safeguard to prevent electric shock or arcing as the crane moves or as the load swings. In practice, treat every line as energized, use a dedicated spotter to keep the operator aware of the line’s position, and stop work if you cannot maintain this clearance. If possible, de-energize or insulate the line or reposition the work to maintain the safe distance. Larger clearances are required for lines rated above 50 kV.

Minimum clearance from overhead power lines to any part of the crane or its load is ten feet for lines rated up to 50 kV. This safety buffer is used because electricity can arc through the air if a crane arm or lifted load gets too close, even without direct contact. The ten-foot distance provides a practical safeguard to prevent electric shock or arcing as the crane moves or as the load swings. In practice, treat every line as energized, use a dedicated spotter to keep the operator aware of the line’s position, and stop work if you cannot maintain this clearance. If possible, de-energize or insulate the line or reposition the work to maintain the safe distance. Larger clearances are required for lines rated above 50 kV.