NFPA 497:2021
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Hardcopy
31-05-2023
English
16-08-2021
Chapter 1 Administration 1.1 Scope. 1.2 Purpose. 1.3 Relationship to NFPA Codes and Standards. Chapter 2 Referenced Publications 2.1 General. 2.2 NFPA Publications. 2.3 Other Publications. 2.4 References for Extracts in Recommendations Sections. Chapter 3 Definitions 3.1 General. 3.2 NFPA Official Definitions. 3.3 General Definitions. Chapter 4 Classification of Combustible Materials 4.1 National Electrical Code Criteria. 4.2 Behavior of ClassI (Combustible Material) Gases, Vapors, and Liquids. 4.3 Conditions Necessary for Ignition. 4.4 Classification of ClassI Combustible Materials. Chapter 5 Classification of ClassI (Combustible Material) Areas 5.1 National Electrical Code (NEC). 5.2 General. 5.3 Class, Division, Classified Locations. 5.4 Zone Classified Locations. 5.5 Unclassified Locations. 5.6 Extent of Classified Locations. 5.7 Discussion of Diagrams and Recommendations. 5.8 Basis for Recommendations. 5.9 Procedure for Classifying Locations. 5.10 Classification Diagrams for ClassI, Divisions. 5.11 Classification Diagrams for Zones. Annex A Explanatory Material Annex B Example of a Method for Determining NEC Group Classification for Mixtures Annex C Informational References
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