OSHA 1910.269 – Arc Rating for Face and Head Protection Paragraph C and E. Is it subtraction?

red background with burning question

 Q: Are these [paragraphs] separate or can they be used together?

OSHA 1910.269(l)(8)(v)

(C)  Arc-rated protection is not necessary for the employee’s head when the employee is wearing head protection meeting § 1910.135 if the estimated incident energy is less than 9 cal/cm2 for exposures involving single-phase arcs in open air or 5 cal/cm2 for other exposures,

(E)  For exposures involving single-phase arcs in open air, the arc rating for the employee’s head and face protection may be 4 cal/cm2 less than the estimated incident energy.

For example, if we have estimated the incident energy at 12.99cal/cm2 for single-phase open air, then we reduce this value to 8.99 cal/cm2 from E above and thus no face shield is needed as long as the hardhat meets 1910.135 from C above.  Or is C derived from E?


Don’t think that is the intention.  The idea behind both of these phrases is to keep from overburdening climbing line workers from having restrictive PPE when possible.  Paragraph E assumes you will be wearing a shield but allows you to avoid a HOOD rather than making the 9 cal cut-off be a 12 cal cut-off.

Have a question about electrical safety and standards? Ask us here!

Hugh Hoagland

Hugh Hoagland

does research and testing of PPE exposed to electrical arcs and is an arc flash expert. Hugh is a Sr. Consultant at ArcWear and Sr. Partner at e-Hazard. Read more about Hugh.

Share This Post

Share on facebook
Share on twitter
Share on linkedin

Leave a Reply

Your email address will not be published. Required fields are marked *