NFPA 497 化学工艺区易燃液体、气体、蒸气分类及电气安装危险性分类
日期:2012-02-09 16:42
ssification in Class I hazardous (classified) locations.
NFPA 497 Classification of Flammable Liquids, Gases, or Vapors and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas has a close relationship to the electrical installation requirements for hazardous (classified) locations contained in NFPA 70 National Electrical Code. To ensure correlation with revisions made to the 2008 NEC, the 2008 NFPA 497 now includes
Changes to the scope to specify that ex
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