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2014 NFPA 70 / NEC Article 500.5(B)?

Question asked by jchristy on Feb 21, 2018

Where do we find the minimum quantities of particular chemicals required to produce vapors "...in the air in quantities sufficient to produce explosive or ignitable mixtures"?   [NFPA 70 2014, Article 500.5(B)]   We have a code official asking us to classify four hand-held containers of flammable cleaning & preservation chemicals (sizes 5 ounces to 32 ounces), per NEC 500.5 -- but we can't find any definition of "quantities sufficient", such as what is listed in IBC Chapter Four Three.   Any insight would be greatly appreciated.

 

Thanks.

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