NFPA 70E Arc flash labeling requirements

[Isaiah]

I can certainly understand Arc-Flash labeling for a switchgear MCB, but why would you also need a label for the associated switchgear bus? The bus isn’t really an arcing device.


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[don_resqcapt19]

The rules have to do with the incident energy that will be created if something causes a fault, not with a device that creates an arc.