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The labeling on the equipment contains the following data:

 system voltage

 arc flash boundary

 PPE category

 incident energy release in cal/cm2

 working distance

 restricted approach boundary

 prohibited approach boundary

TABLE 1.10. Arc Flash Boundary and Incident Energy Release for 30 kA of Bolted Fault Current (Arc Flash Current = 28.58 kA rms) in 13.8-kV Switchgear, 13.8-kV System Resistance Grounded, Working Distance = 36″, Gap = 153 mm

Source: Reference [17]. © 2012 National Fire Protection Association.

Arc Duration in Seconds	Arc Flash Boundary in Inches	Energy, cal/cm2
0.058	74
0.5	851	26
1.0	1736	52
1.5	2633	78
2	3539	104

 equipment identification

 the protective device identification that clears the fault.

The labels can be generated on a variety of media, including plastic weatherproof laminates, and most commercial arc flash analysis program will allow custom designing the labels. A user can choose what goes on the label, including the description of PPE. Even the type fonts can be user selectable.

In NFPA 70E 2012, equipment labeling has been reworded to reflect Article 110.16 of the NEC. Each label must contain the incident energy at working distance or the arc rating of the required PPE, or the maximum HRC for that type of equipment. Also, arc flash boundary needs to be specified.