New arc flash rating

[steven thornton]

Maybe you can help us out. With the new rating, no category 0, we have a sticker rated at 0.6 cal/cm2 and it is labeled category 1. with a category 1 it requires a face shield, but at 0.6 cal/cm2 it does not. My question is should the label have the category 1 on it, or just the PPE required for 0.6/cm2.

 

[jim dungar]

The list of PPE items shown in NFPA70E Table 130.7(C)(16) were chosen as being acceptable for the specific tasks (not the general incident energy level) shown in the tables in 130.7(C)(15) based on the associated available fault current and clearing times.

Once a company has 'calculated' the available incident energy, it is up to the company to then decide what PPE is required based on a risk analysis.
My company follows the suggested PPE from Annex H. However, I do know many companies that have site-specific PPE lists for a maximum incident energy of 1.2 cal/cm^2

 

[steven thornton]

Thanks Jim