De-Energize Equipment Prior to Work—UNLESS… [Maintenance Tip]

December 21, 2015 tohanlon@reliabilityweb.com

NFPA 70E, CSA Z462 and OSHA 1910 are very clear: equipment must be de-energized (“electrically safe work condition”) if the worker is exposed to a possible hazard (within the limited approach boundary, or performing a task that increases risk of arc flash). But when is it OK to use appropriate PPE and work? When working at less than 50V. When de-energizing could “introduce additional hazards or risks” - for…

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