Hazardous Locations Summary by Mark Class I = Gas and Vapor {flammable and combustible LIQUID}. {Class I} has two Divisions {Division 1, Division 2} Division I = Normal. {Serious Explosion and it will definitely happen} {one Mistake, you are on Fire} Division II = Abnormal. {none Serious Explosion but might really happen}. {two mistakes you are on Fire}. i.e ={Leakage then Spark }. Class II = Division I & Division II {Division I = Dust in the air} {Division II = Dust on Equipment}. Any of these Divisions could cause fire. Class II Division I or II = Combustible Dust.{500 microns or less} is considered combustible dust and could cause fire. {Dust in {Class II, Division I = (Dust in Air)} ….. Dust in {Class II, Division II = (Dust on Equipment)}….. Class III { What are ignitable fibers or flyings? This classification is created by the presence of easily ignitable fibers or flyings. Typically these fibers and flyings are not suspended in the air, but can collect around machinery or on lighting fixtures and where heat, a spark or hot metal can ignite them.} Class III, division I = { Textile mills, cotton gins; • Cotton seed mills, flax processing plants; and • Plants that shape, pulverize or cut wood and create sawdust or flyings {clothing or farms that deal with grains like the coat of the coffee for example} Class III, Division II = { Division 2 is also a subset of Class III and is classified as an area where ignitable fibers or flyings may be stored or handled.} {like when you store clothing or cotton gin somewhere}
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![Health Care Wiring Methods, NEC 2020 - [517.13], (17min:50sec)](/img/tr.png)
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Hazardous Locations Summary by Mark
Class I = Gas and Vapor {flammable and combustible LIQUID}.
{Class I} has two Divisions {Division 1, Division 2}
Division I = Normal. {Serious Explosion and it will definitely happen} {one Mistake, you are on Fire}
Division II = Abnormal. {none Serious Explosion but might really happen}. {two mistakes you are on Fire}.
i.e ={Leakage then Spark }.
Class II = Division I & Division II {Division I = Dust in the air} {Division II = Dust on Equipment}. Any of these Divisions could cause fire.
Class II Division I or II = Combustible Dust.{500 microns or less} is considered combustible dust and could cause fire. {Dust in {Class II, Division I = (Dust in Air)} ….. Dust in {Class II, Division II = (Dust on Equipment)}…..
Class III { What are ignitable fibers or flyings?
This classification is created by the presence of easily ignitable fibers or flyings. Typically these fibers and flyings are not suspended in the air, but can collect around machinery or on lighting fixtures and where heat, a spark or hot metal can ignite them.}
Class III, division I = { Textile mills, cotton gins; • Cotton seed mills, flax processing plants; and • Plants that shape, pulverize or cut wood and create sawdust or flyings {clothing or farms that deal with grains like the coat of the coffee for example}
Class III, Division II = { Division 2 is also a subset of Class III and is classified as an area where ignitable fibers or flyings may be stored or handled.} {like when you store clothing or cotton gin somewhere}
I truly appreciate this Mike !
See Sandy’s video. Would love to see more eyes on this as EV usage is increasing. ua-cam.com/video/tDp9PhPJhUI/v-deo.html
Zones???? Not 2020 NEC
Yes, 'Zones' is contained in the 2020 NEC, Articles 550 and 506.
Motor oil is class 1 . I have a job class 1 sign in a motor oil tank .lol😅
New Mexico EE98J 409328 🤙