For power lines rated 100KV, what is the minimum clearance mandated by OSHA 1926.1408?

The correct answer reflects OSHA standards for maintaining safe distances from power lines rated at 100KV. According to OSHA 1926.1408, when working near such high voltage lines, the minimum clearance required is indeed 15 feet, provided that encroachment precautions are in place. This clearance is necessary to protect workers from the hazardous effects of electrical shock, arcing, and other risks associated with high voltage power lines.

Maintaining this distance is crucial because high voltage lines can carry significant electrical energy that can pose serious dangers if dropped equipment or a worker comes too close. The 15-foot rule ensures a safety buffer to minimize risks associated with electrical work near power lines. This standard is designed to help signal persons and other construction workers to make informed decisions about safe working distances when proximity to energized lines becomes a factor on the construction site.