Hazardous Area Classification In > urlin.us/3jbak

Hazardous Area Classification In

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Class,,,III,,,locations,,,are,,,further,,,subdivided,,,into,,,two,,,divisions.,,,This,,,,could,,,,be,,,,on,,,,a,,,,continuous,,,,,intermittent,,,,or,,,,periodic,,,,basis.,,,,Think,,,,Safety.,,,,Electrical,,equipment,,intended,,for,,use,,in,,a,,chemical,,factory,,or,,refinery,,is,,designed,,either,,to,,contain,,any,,explosion,,within,,the,,device,,,or,,is,,designed,,not,,to,,produce,,sparks,,with,,sufficient,,energy,,to,,trigger,,an,,explosion.,,View,,all,,Quick,,Tips,,Technical,,Resources,,at,,www.grainger.com/quicktips.,,ClassHazardous,,Material,,in,,Surrounding,,Atmosphere,,Class,,I,,Hazardous,,because,,flammable,,gases,,or,,vapors,,are,,present,,in,,the,,air,,in,,quantities,,sufficient,,to,,produce,,explosive,,or,,ignitable,,mixtures.,,In,,North,,America,,,the,,most,,widely,,used,,hazardous,,location,,classification,,system,,is,,defined,,by,,the,,National,,Fire,,Protection,,Association,,(NFPA),,Publication,,70,,,National,,Electric,,Code,,(NEC),,in,,Articles,,500,,to,,506.,,Other,,,,Key,,,,Definitions,,,,Explosion-proof,,,,apparatus:,,,,Apparatus,,,,enclosed,,,,in,,,,a,,,,case,,,,that,,,,is,,,,capable,,,,of,,,,withstanding,,,,an,,,,explosion,,,,of,,,,a,,,,specified,,,,gas,,,,or,,,,vapor,,,,that,,,,may,,,,occur,,,,within,,,,it,,,,and,,,,of,,,,preventing,,,,the,,,,ignition,,,,of,,,,a,,,,specified,,,,gas,,,,or,,,,vapor,,,,surrounding,,,,the,,,,enclosure,,,,by,,,,sparks,,,,,flashes,,,,or,,,,explosion,,,,of,,,,the,,,,gas,,,,or,,,,vapor,,,,within,,,,,and,,,,that,,,,operates,,,,at,,,,such,,,,an,,,,external,,,,temperature,,,,that,,,,it,,,,will,,,,not,,,,ignite,,,,a,,,,surrounding,,,,flammable,,,,atmosphere.,,,,Also,,,,included,,,,in,,,,the,,,,marking,,,,are,,,,the,,,,manufacturers,,,,name,,,,or,,,,trademark,,,,and,,,,address,,,,,the,,,,apparatus,,,,type,,,,,name,,,,and,,,,serial,,,,number,,,,,year,,,,of,,,,manufacture,,,,and,,,,any,,,,special,,,,conditions,,,,of,,,,use.,,,,

Ignitable,,concentrations,,of,,flammable,,gases,,or,,vapors,,may,,exist,,frequently,,because,,of,,repair,,or,,maintenance,,operations,,or,,because,,of,,leakage.,,Unclassified,,,locations,,,Also,,,known,,,as,,,non-hazardous,,,or,,,ordinary,,,locations,,,,these,,,locations,,,are,,,determined,,,to,,,be,,,neither,,,Class,,,II,,,,Division,,,1,,,or,,,Division,,,2;,,,Class,,,III,,,,Division,,,1,,,or,,,Division,,,2;,,,Zone,,,20,,,,Zone,,,21,,,or,,,Zone,,,22;,,,or,,,any,,,combination,,,thereof.,,,Heat,,,,producing,,,,elements,,,,such,,,,as,,,,motor,,,,winding,,,,,electrical,,,,heaters,,,,,including,,,,heat,,,,tracing,,,,and,,,,lighting,,,,fixtures,,,,are,,,,often,,,,designed,,,,to,,,,limit,,,,their,,,,maximum,,,,temperature,,,,below,,,,the,,,,autoignition,,,,temperature,,,,of,,,,the,,,,material,,,,involved.,,,,Class,,,,II,,,,Hazardous,,,,because,,,,combustible,,,,or,,,,conductive,,,,dusts,,,,are,,,,present.,,,,The,,,simplest,,,strategy,,,is,,,to,,,minimize,,,the,,,amount,,,of,,,electrical,,,equipment,,,installed,,,in,,,a,,,hazardous,,,area,,,,either,,,by,,,keeping,,,the,,,equipment,,,out,,,of,,,the,,,area,,,altogether,,,or,,,by,,,making,,,the,,,area,,,less,,,hazardous,,,by,,,process,,,improvements,,,or,,,ventilation,,,with,,,clean,,,air.,,,A,,list,,must,,be,,drawn,,up,,of,,every,,explosive,,material,,that,,is,,on,,the,,refinery/chemical,,complex,,and,,included,,in,,the,,site,,plan,,of,,the,,classified,,areas.,,2016,,,,W.W.,,,,As,,,a,,,guide,,,for,,,Zone,,,1,,,,this,,,can,,,be,,,defined,,,as,,,101000,,,hours/year,,,or,,,0.110%,,,of,,,the,,,time.[4],,,.,,,

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