Everyone, except qualified employees, must at least what from apparatus energized up to 50,000 volts?

The requirement for maintaining a safe distance from apparatus energized up to 50,000 volts is 10 feet. This safety measure is crucial in electrical work environments to protect unqualified persons from the dangers associated with electrical shocks and arc flashes.

The 10-foot distance is established based on the principle that the risk of electrical hazards increases as the proximity to energized equipment decreases. Qualified employees, who have received the necessary training and are aware of safety protocols, may work closer to such equipment under controlled conditions. However, to minimize risk for unqualified individuals, the 10-foot clearance serves as a guideline to ensure safety and prevent accidental contact with energized parts.