![]() The energy at this boundary line would be equivalent to 1.2cal/ cm² or 5 Joules of heat energy. The arc flash boundary identifies the distance from the equipment at which an unprotected person would receive second-degree burns in the event of an arc flash. Ultimately this distinction is made on a site-by-site basis as requested by site personnel but should be consistent across the site. The regulation does not provide guidance on distinguishing between the use of ‘Danger’ or ‘Warning’ on the header, however it is common to have ‘Warning’ labels applied in lower risk scenarios (i.e.: 40cal/ cm²). Each of these components is discussed in further detail below to help you understand each component of the warning label.Īrc flash labels must use an ANSI Z535 compliant header with the word ‘DANGER’ in white letters on a red band or the word ‘WARNING’ in black letters on an orange band. The label shown here is marked with letters A – I each of which highlights an important component of the arc flash label. The NFPA 70E regulation states that workplace electrical equipment that is likely to be serviced should be marked with a cautionary label. Arc flash studies are a requirement of NFPA 70E, while arc flash labeling requirements are specifically defined in section 130.5(H) of the regulation. The information on an arc flash label (sometimes referred to as an arc flash sticker) is based directly on the results of the arc flash study. The regulation helps companies and employees avoid workplace injuries and fatalities. The goal of this regulation is to protect personnel by reducing exposure to major electrical hazards. Arc flash labelling requirements are defined by the newly updated NFPA 70E 2021 standard. NFPA-70E was developed at OSHA’s request and sets the standards for electrical safety in the workplace. Arc flash labels are designed to keep people safe.
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