What Are the Requirements for Arc Flash Labels?
NFPA 70E states that “Switchboards, panelboards, industrial control panels, meter socket enclosures, and motor control centers in other than dwelling occupancies, which are likely to require examination, adjustment, servicing, or maintenance while energized, shall be field marked to warn qualified persons of potential electric arc flash hazards.” In addition to the equipment required, many companies choose to mark other equipment that carries a risk of arc flash, such as disconnect switches. More information on arc flash regulations is available in our free online arc flash tutorial. Circumstances that require work on energized equipment may include: • Circuits providing power to life-support equipment • Circuits that are part of a larger process that cannot be completely shut down • Circuits providing power to emergency lights and other safety equipment • Any other cases in which de-energizing the equipment would pose a greater hazard than failing to de-energize • Any other case in wh
