Iitreyi zekhebulazizinto ezibalulekileyo ekufakweni kombane, zibonelela ngendlela ecwangcisiweyo yokufakelwa kweengcingo zombane kunye neentambo. Phakathi kweentlobo ngeentlobo zeetreyi zentambo, iitreyi zentambo ezigqunyiweyo zibaluleke kakhulu ekukhuseleni iintambo kwizinto ezingqongileyo kunye nomonakalo womzimba. Ukuqonda imigaqo yeNational Electrical Code (NEC) malunga neetreyi zentambo kubalulekile ekuqinisekiseni ukhuseleko kunye nokuthotyelwa kwemithetho kwiinkqubo zombane.
I-NEC, ehlaziywa rhoqo emva kweminyaka emithathu, ichaza iimfuno ezithile zokufakelwa nokusetyenziswa kweetreyi zekhebula kwiNqaku 392. Eli nqaku libonelela ngezikhokelo malunga noyilo, ukufakwa, kunye nokugcinwa kweetreyi zekhebula, kuquka neetreyi zekhebula ezigqunyiweyo. Ngokwe-NEC, iitreyi zekhebula kufuneka zakhiwe ngezinto ezifanelekileyo kwindawo ezifakwe kuyo. Oku kuquka izinto eziqwalaselwayo malunga nokumelana nokugqwala, ukulinganiswa komlilo, kunye nomthamo wokuthwala umthwalo.
Enye yezona zinto zibalulekileyo kwikhowudi ye-NECiitreyi zekhebulayimfuneko yokubeka umhlaba ofanelekileyo kunye nokubopha. Iitreyi zekhebula ezigqunyiweyo kufuneka zibekwe phantsi komhlaba ukuthintela iingozi zombane, kwaye i-NEC ichaza iindlela zokufezekisa ukuqiniswa komhlaba okusebenzayo. Ukongeza, le khowudi iyalela ukuba iitreyi zekhebula ezigqunyiweyo zifakwe ngendlela evumela umoya owaneleyo kunye nokuchithwa kobushushu, nto leyo ebalulekileyo ekugcineni ukuthembeka kweentambo ezigcinwe ngaphakathi.
Ngaphezu koko, i-NEC igxininisa ukubaluleka kokugcina ukufikelela okucacileyo kwiitreyi zekhebula ngeenjongo zokuhlola nokulungisa. Oku kubaluleke ngakumbi kwiitreyi zekhebula ezigqunyiweyo, njengoko zinokusitha ukubonakala kweentambo ezingaphakathi. Ukubhalwa ngokufanelekileyo kweelebhile kunye nokubhalwa kweentambo ezingaphakathi kwitreyi nako kuyafuneka ukuze kube lula ukugcinwa kunye nokusombulula iingxaki kwixesha elizayo.
Ngamafutshane, ikhowudi ye-NEC yeetreyi zekhebula, kuqukaiitreyi zekhebula ezigqunyiweyo, yenzelwe ukuqinisekisa ukhuseleko, ukuthembeka, kunye nokusebenza kakuhle kokufakelwa kombane. Ukunamathela kule migaqo akugcini nje ngokukhusela ukuthembeka kwenkqubo yombane kodwa kukwaphucula ukhuseleko lwendalo esebenza kuyo.
→ Ngazo zonke iimveliso, iinkonzo kunye nolwazi oluhlaziyiweyo, ncedaQhagamshelana nathi.
Ixesha leposi: Matshi-24-2025