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Why wear a faceshield for 1.2cal/cm2?

Question asked by Julia Zummo on Apr 8, 2016
Latest reply on Apr 17, 2016 by Elizabeth Watson

The new 2015 NFPA 70E, Annex H, recommends wearing a faceshield for projectile protection at 1.2cal/cm2 arc flash hazard or less.  What data is that requirement based on?  Is there a study out there that shows projectiles are likely from such a low arc flash hazard, or are there documented incidences of people having been injured by projectiles at low arc energies?  Or did someone just decide that this rule was a good idea?

 

I'm looking for any kind of supporting evidence I can use to demonstrate that this extra PPE is necessary.  Because the annexes are "informational," this PPE is not a requirement of NFPA 70E, but I want to settle our internal discussion of why it's a good idea.

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