What are the guidelines within NFPA 70E on how to assess the flash hazard and determine adequate protection for the worker?
NFPA 70E cites three methods for assessing a flash hazard: 1) conduct a flash hazard analysis. For companies with hundreds or even thousands of employees and a broad variety of work activities taking place around momentary electric arc and thermal hazards every day, this could be an unwieldy task. 2) Use Table 130.7(C) (9) (a) from NFPA 70E to determine the hazard/risk category for a specific task. This table includes a comprehensive list of the most commonly encountered tasks and the associated risk category and required protection for each. Or, 3) Use Annex H from NFPA 70E. It provides a simplified, two category approach to flame resistant apparel. While the table and annex provide useful guidelines, remember that the approach recommended is to perform a flash hazard analysis. Table 130.
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