According to ANSI Z133, what is the minimum approach distance for non-qualified personnel around 7.2 kV power lines?

The minimum approach distance for non-qualified personnel around 7.2 kV power lines is specified as 10 feet in ANSI Z133. This standard is critical for ensuring safety around electrical hazards, specifically when working near overhead power lines.

Maintaining a distance of 10 feet is essential to prevent accidental contact with energized conductors, as this distance accounts for the risk of electrical arcs and other potential hazards that can occur if personnel get too close. The standard sets this clear boundary to protect individuals from severe electrical shock or injuries that can result from line contact or flashover incidents.

In the context of the other options, distances below 10 feet, such as 3.5 feet, 6 feet, and even 15 feet may not meet the necessary safety requirements as outlined in ANSI Z133. While 15 feet provides an extra cushion, it is more than what is mandated for this particular voltage level; therefore, it is not the specified minimum.