What does the limited approach boundary signify?

The limited approach boundary signifies the distance at which barriers should be established to ensure safety around electrical work zones, specifically to protect unqualified personnel from potential electrical hazards. When this boundary is established, it serves as a critical guideline for maintaining safety by indicating how close individuals who are not trained or qualified to handle electrical equipment can go without being at risk.

Establishing this boundary is an essential part of electrical safety protocols, as it helps to prevent accidental contact with energized parts that could lead to serious injury or fatality. The correct interpretation of this boundary emphasizes the importance of visible and physical barriers to safeguard individuals who may inadvertently wander into high-risk areas.

In contrast, the other options describe different safety concepts. For instance, the maximum distance for unqualified personnel to approach would imply a specific measure, which is not the exact intent of the limited approach boundary. Additionally, stating that it marks the distance where voltage is no longer a hazard overlooks the fact that this boundary still represents a zone where caution is needed, even if the hazard diminishes. Therefore, the correct interpretation focuses on the importance of establishing a physical barrier to maintain safety in electrical work environments.