ARTICLE 503. CLASS III LOCATIONS


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ARTICLE 503. CLASS III LOCATIONS
ARTICLE 503. CLASS III LOCATIONS503.5. General. The small fibers of cotton that are carried everywhere by air currents in some parts of cotton mills and the wood shavings and sawdust that collect around planers in woodworking plants are common examples of the combustible flyings or fibers that cause the hazards in Class III, Division 1 locations. Wood flour, as produced in some finishing operations, is classified as combustible dust if it meets the 500-μm particulate size limit of the definition (see 500.2 and the commentary in this book at 502.1). A cotton warehouse is a common example of a Class III, Division 2 location.503.6. Zone Equipment. Equipment "listed and marked" for installation…
Citation
Frederic P. Hartwell; Joseph F. McPartland; Brian J. McPartland: McGraw-Hill's National Electrical Code 2017 Handbook, 29th Edition. ARTICLE 503. CLASS III LOCATIONS, Chapter (McGraw-Hill Professional, 2017), AccessEngineering Export