AnsweredAssumed Answered

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 " 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.