Transcription of ARTICLE HAZARDOUS (CLASSIFIED) LOCATIONS
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ARTICLE HAZARDOUS (CLASSIFIED) LOCATIONS
Mike Holt Enterprises, Inc. ( )23 ARTICLE500 HAZARDOUS ( classified ) LOCATIONSI ntroduction to ARTICLE 500 HAZARDOUS ( classified ) LocationsA HAZARDOUS ( classified ) location is an area where the possibility of fire or explosion can be created by the presence of flam-mable or combustible gases or vapors, combustible dusts, or easily ignitable fibers/flyings. Electric arcs, sparks, and/or heated surfaces can serve as a source of ignition in such 500 provides a foundation for applying ARTICLE 501 (Class I LOCATIONS ), ARTICLE 502 (Class II LOCATIONS ), ARTICLE 503 (Class III LOCATIONS ), and ARTICLE 504 (Intrinsically Safe Systems) all of which immediately follow ARTICLE 500.
Combustible Dust. Dust particles that are 500 microns or smaller and present a fire or explosion hazard when dispersed and ignited in air. Author’s Comment: n The size of the material may be a significant factor in distin-guishing dust (Class II) from fibers and flyings (Class III). Dust-Ignitionproof. Equipment enclosed in a manner that excludes
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