Arc Flash - Single Layer

[Dumbo2929]

Is anyone well enough versed in NFPA-70E to answer this? Is it required for HRC2 (8 cal/cm2) PPE that 2 layers be worn? Can a single layer of 11 cal such as a coverall be worn, or is some type of cotton undergarment or cotton layer required. My understanding was that HRC 2 needed 2 layers to be compliant even if the underlayer had no FR rating. The standard talks about it being desirable to have multiple layers but I cannot fins a requirement.

 

[Zogzog]

Single layer is fine, the 2009 70E cleared this up the confusion on this, but anything worn under it has to be non-melting.

 

[cranky108]

Be ware the underware police. Darn those elstic wast bands.

 

[Zogzog]

Actually the elastic band is one of the few exceptions to the meltable fiber rule, along with socks. But for those safety crazy people

http://www.shop.arcstore.com/main.sc;jsessionid=78FD07568822251446E9A2BB789EA58F.qscstrfrnt02