When operating near high-voltage powerlines rated at 275 kV, what clearance is required?

When operating near high-voltage powerlines rated at 275 kV, what clearance is required?

• A. 15 feet
• B. 20 feet
• C. 25 feet
• D. 30 feet

Answer: (B)

When working near energized overhead lines, the distance you keep from the conductors is tied to the voltage to prevent electrical arcing. Higher voltages require larger air gaps, and 275 kV lines demand a specific safety buffer that accounts for line sag, wind, and the movement of rigging gear. The standard minimum clearance for 275 kV is twenty feet, providing a reliable margin so arcing or unintended contact is unlikely even if the equipment shifts slightly during a lift. Fifteen feet would be too close for this voltage, increasing the risk of arcing. While larger clearances like twenty-five or thirty feet offer more protection, the required minimum for 275 kV in this context is twenty feet.

When working near energized overhead lines, the distance you keep from the conductors is tied to the voltage to prevent electrical arcing. Higher voltages require larger air gaps, and 275 kV lines demand a specific safety buffer that accounts for line sag, wind, and the movement of rigging gear. The standard minimum clearance for 275 kV is twenty feet, providing a reliable margin so arcing or unintended contact is unlikely even if the equipment shifts slightly during a lift.

Fifteen feet would be too close for this voltage, increasing the risk of arcing. While larger clearances like twenty-five or thirty feet offer more protection, the required minimum for 275 kV in this context is twenty feet.