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NFPA® 70E is a national consensus standard that establishes "best practices" for protection from electric arc flash hazards. The information on this page is meant as an information guide only, and not a guarantee for compliance.
Employers must conduct shock hazard analysis to establish a flash protection boundary. Employers must select the proper flame resistant clothng and personal protective equipment (PPE) that must be worn based on the incident enery associated with the specific task as determined by:
Three Steps to Compliance with NFPA® 70E:
The standard requires that garments have a minimum arc flash rating, which may be either required for specific tasks including double-layer FR, flash hoods, FR hard hat liners, safety glasses or safety goggles, face shields, hard hat, hearing protection, leather gloves, voltage-rated gloves and voltage rated tools.
The NFPA has indentified four FR hazardous risk categories levels, which are numbered by severity from 1 to 4. Hazard Risk Category is the level of arc flash protection clothing you must wear to protect against a minimum level of incident energy measured in cal/cm2.
Employers are required to conduct a hazard analysis to determine the "flash protection boundary." Inside the flash protection boundary, exposure to an electric arc is predicted to cause a second-degree burn injury and PPE is required. Required FR clothing and other PPE is based on the specific hazard present.
The severity of the arc hazard is defined as incident energy in (cal/cm²
). It may be deteremined by three methods:
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