NFPA 497A : 1992
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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CLASSIFICATION OF CLASS I HAZARDOUS (CLASSIFIED) LOCATIONS FOR ELECTRICAL INSTALLATIONS IN CHEMICAL PROCESS AREAS
12-01-2013
01-09-1997
Chapter 1 General
1.1 Scope
1.2 Purpose
1.3 National Electrical Code criteria
Chapter 2 Basic considerations
2.1 National Electrical Code criteria
2.2 Conditions necessary for ignition
2.3 Behavior of gases, vapors, and liquids
2.4 Division 1 classified locations
2.5 Division 2 classified locations
2.6 Nonclassified locations
2.7 Extent of classified location
Chapter 3 Determining the degree and extent of
hazardous (classified) locations
3.1 Diagrams and recommendations
3.2 Bases for recommendations
3.3 Procedure for classifying locations
3.4 Index of classification diagrams
Chapter 4 Referenced publications
Appendix A Referenced publications
Index
Recommends steps to determine the location, type, and scope of hazards presented by electrical installations in operations where flammable or combustible liquids are processed or handled. Coverage includes nonclassified locations, extent of classified location, procedure for classifying locations, conditions necessary for ignition, and index of classification diagrams. Also gives National Electrical Code Criteria.
| DocumentType |
Standard
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| PublisherName |
National Fire Protection Association
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| Status |
Superseded
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| SupersededBy |