A worker in the High Energy Physics division was working on a power supply that converted 110 volt AC power to 600 volt DC power. The worker received a shock and burns to two of his fingers when he inadvertently came in contact with a high voltage wire and a grounding source. The worker told his supervisor that he was stripping the coating off a wire when he saw a flash, heard a bang, and felt pain.
Lessons Learned: Energy isolating devices are mechanical devices that physically prevent the transmission or release of energy. Push buttons, selector switches and other control circuit or interlock devices are not energy-isolating devices.
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