Which clearance is necessary when working near power lines above 50kV?

When working near power lines that operate above 50kV, a clearance of 20 feet is required. This distance is defined to ensure the safety of workers and equipment by minimizing the risk of electrical hazards, such as arc flash or electric shock. High-voltage power lines can generate significant electric fields, and the recommended clearance provides a buffer zone to protect personnel from these dangers.

This standard is in line with regulations set forth by organizations like OSHA and the National Electrical Safety Code, which emphasize the importance of maintaining appropriate distances from live electrical conductors to prevent accidents and injuries. Ensuring a minimum of 20 feet also accounts for the potential for equipment to sway or for personnel to inadvertently come too close while performing tasks.