Qhov chaw muaj phom sij thiab pov thawj tawg yog ob lub ntsiab lus sib txawv. Cov npe hauv cheeb tsam no xav tau ntau txoj hauv kev.
Chav Kawm I, Division 1 kev ntaus nqi feem ntau raug muab rau cov teeb pom kev tawg. Lawv yuav tsum txwv tsis pub cov khoom siv hluav taws xob siab thiab amperage los ntawm kev ua raws li qhov hluav taws kub. Cov ntsiab lus uas ua rau sparks yog nyob rau hauv ib tug loj enclosure. Cov cuab yeej tiv thaiv cov pa roj kub los ntawm kev ntws mus rau hauv qhov xwm txheej uas vapors lossis roj nkag rau hauv thiab ntes hluav taws. Txawm li cas los xij, tso cai rau cov pa cua txias ntawm cov pob qij txha.
Cov cheeb tsam uas tau xaiv qhov chaw txaus ntshai
Cov chaw muaj kev phom sij hauv North America tau muab faib ua cov chav kawm, kev faib, thiab ib cheeb tsam.
Chav Kawm thiab Division System (Tsuas yog Asmeskas & Canada)
Chav Kawm I, Division 1-Qhov twg cov hluav taws xob hluav taws xob ntau ntawm cov pa hluav taws xob, cov vapors, lossis cov kua dej tsis zoo yuav tshwm sim raws li cov xwm txheej ua haujlwm.
Pawg A, B, C, thiab D ntawm Chav Kawm I muaj xws li acetylene, hydrogen, ethylene, thiab propane.
Chav Kawm II, Division 1 - Qhov twg ignitable concentrations ntawm combustible plua plav tuaj yeem tshwm sim txhua lub sijhawm lossis qee lub sijhawm nyob rau hauv ib txwm ua haujlwm.
Chav Kawm II, Division 2 - Qhov twg ignitable concentrations ntawm combustible dusts yuav tsis muaj nyob rau hauv ib txwm ua hauj lwm tej yam kev mob.
Pawg II - E - Hlau Plua Plav, F- Coal Plua Plav, G - Grain Dust
Chav Kawm III, Division 1 - Qhov twg ignitable concentrations ntawm ignitable fibers thiab ya tuaj yeem muaj nyob rau txhua lub sijhawm lossis qee lub sijhawm raws li kev ua haujlwm ib txwm muaj.
Chav Kawm III, Division 2 - Qhov twg ignitable concentrations ntawm ignitable fibers thiab ya tsis zoo li yuav muaj nyob rau hauv ib txwm ua hauj lwm tej yam kev mob.
Systems for Zones (IECEx/Canada & US)nemalux-hazardous-location-lighting
Raws li qhov zaus thiab lub sijhawm ntawm qhov chaw tawg pa taws / plua plav, qhov chaw txaus ntshai tau muab faib ua cov Zones hauv qab no:
Zone 0, 20 - Nruam, tsis tu ncua, lossis rau lub sijhawm ntev, muaj ib puag ncig uas tuaj yeem tawg tau.
Thaj Chaw 1, 21: Qee zaus, thaum lub sijhawm ua haujlwm niaj hnub, qhov chaw uas muaj hluav taws kub yuav tshwm sim.
Thaj Chaw 2, 22: Yog tias qhov chaw uas muaj hluav taws kub hnyiab tshwm sim thaum lub sijhawm ua haujlwm tsis tu ncua, nws tsuas yog siv sijhawm luv luv xwb.
