What is the Minimum Approach Distance (MAD) for an energized powerline carrying 50kV?

The Minimum Approach Distance (MAD) is a critical safety standard that helps prevent electrical shock and accidents when working near energized power lines. For a power line carrying 50 kV, the MAD is established at 10 feet. This distance ensures that workers maintain a safe buffer zone while operating equipment or performing tasks in proximity to the high-voltage line.

The rationale behind this specific distance is to account for the electrical field that surrounds energized power lines, which can extend beyond the physical line itself. By enforcing a minimum distance, it reduces the risk of accidental contact or inadvertent arching that could result in severe injuries or fatalities.

In the context of the other choices, distances such as 5 feet, 15 feet, or 20 feet do not align with the established safety protocols for this voltage level. Specifically, 5 feet may be too close to ensure safety, while 15 feet and 20 feet may be overly cautious for this particular voltage, though still providing a safe margin. Thus, the determined minimum distance of 10 feet is the appropriate standard for work near a 50 kV power line.