Ukubonelela ngokhuseleko kwiingozi ezinokubakho ezifana nokudibana kwabantu kunye nemozulu embi, ukujikeleza kombane kunye nezixhobo ezinxulumeneyo ezifana neziqhekeza zombane zihlala zibekwe ngaphakathi kweendawo ezivaliweyo.Kodwa ekubeni ezinye iimeko zibiza amanqanaba aphezulu okhuseleko kunabanye, ayizizo zonke iindawo ezivaliweyo ezenziwe ngokulinganayo.Ukubonelela ngesikhokelo kumanqanaba okhuseleko kunye nokwakhiwa, i-National Electrical Manufacturers Association ikhuphe uluhlu lwezikhokelo eziye zamkelwa kuwo wonke ushishino lombane njengomgangatho we-de facto kwi-enclosures zombane.
Phakathi koluhlu lweereyithingi ze-NEMA, indawo ebiyelweyo ye-NEMA 4 ihlala isetyenziselwa ukhuseleko lwayo ngokuchasene nezinto, kubandakanya imozulu ebandayo kunye nokuyilwa komkhenkce ngaphandle kwendawo ebiyelweyo.I-NEMA 4 ibonelela ngenqanaba elongeziweyo lokhuseleko, kwaye yeyona ndawo iphantsi yogcino lwe-NEMA olungangenwa luthuli.Ukongeza, inokukhusela kumanzi atshizayo kunye namanzi aqondiswe ngombhobho.Nangona kunjalo, ayibubo ubungqina bokudubula, ngoko ke ayifanelekanga ukusetyenziswa kwizicelo eziyingozi kakhulu.
Ukongeza, indawo ebiyelweyo ye-NEMA 4X nayo yenziwe.Njengoko kuqikelelwa ngokulula, i-NEMA 4X yiseti yokulinganisa kwe-NEMA 4, ngoko ke ibonelela ngenqanaba elifanayo lokhuseleko kwimozulu yangaphandle, ngakumbi ngokuchasene nokungcola, imvula, iliqhwa kunye nothuli olubethwa ngumoya.Ikwabonelela ngenqanaba elifanayo lokhuseleko lokutshiza kwamanzi.
Umahluko kukuba i-NEMA 4X kufuneka inikeze ukhuseleko olongezelelweyo kwi-corrosion ngaphaya koko kubonelelwe yi-NEMA 4. Ngenxa yoko, iindawo ezivaliweyo kuphela ezenziwe kwizinto ezichasene ne-corrosion, njengensimbi engenasici kunye ne-aluminium, ziyakwazi ukufaneleka kwi-NEMA 4X rating.
Njengoko kunjalo ngeendawo ezininzi ezivaliweyo ze-NEMA, uluhlu lweendlela ezinokukhetha kuzo zisenokongezwa, kubandakanywa ukungena komoya ngenkani kunye nolawulo lwemozulu lwangaphakathi.
Ixesha lokuposa: Apr-18-2022