Equipment Labeling. Electrical equipment such as switchboards, panelboards, industrial control panels, meter socket enclosures, and motor control centers that are in other than dwelling units and that 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
- At least one of the following:
- available incident energy and the corresponding working distance, or the arc flash PPE category…for the equipment
- minimum arc rating of clothing
- site-specific level of PPE