Arc Flash Labels
The electrical equipment labeling requirements can be found in both the NEC and the NFPA 70E. The NEC details the need for arc flash labels in article 110.16. The NFPA 70E requirements have been updated in 2018 with much greater detail of what should be posted on the labels.
Electrical equipment such as switchboards, panelboards, industrial control panels, meter socket enclosures, and motor control centers that are in other than dwelling units and are likely to require examination, adjustment, servicing or maintenance while energized, shall be field marked with a label containing all the following information:
- Nominal system voltage
- Arc flash boundary
- Available incident energy and the corresponding working distance
- Minimum arc rating of clothing
- Site-specific level of PPESite-specific level of PPE
The NEC 110.16 also covers the equipment types listed above without the detail of information required to be shown on the label. The NEC 110.16, does however make reference to the most recent NFPA 70E for more detail on labeling requirements.
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