Ukuvuza komhlaba ngumsinga ofikelela emhlabeni ngendlela ebingacetywanga. Kukho iindidi ezimbini: ukuvuza komhlaba ngokungeyonjongo okubangelwa kukugquma okanye ukungaphumeleli kwesixhobo kunye nokuvuza kwangabom komhlaba okubangelwa yindlela eyilwe ngayo isixhobo. Ukuvuza “koYilo” kunokubonakala kungaqhelekanga, kodwa ngamanye amaxesha akunakuphepheka-umzekelo, izixhobo ze-IT zihlala zivelisa ukuvuza okuthile nokuba zisebenza kakuhle.
Nokuba yeyiphi na imvelaphi yokuvuza, kufuneka ithintelwe ekubangeleni ukothuka kombane. Oku ngokuqhelekileyo kwenziwa ngokusebenzisa i-RCD (isixhobo sokukhusela ukuvuza) okanye i-RCBO (i-breaker circuit breaker kunye nokukhusela okungaphezulu). Balinganisa i-current kumqhubi womgca kwaye bawuqhathanise kunye nekhoyo kwi-conductor engathathi hlangothi. Ukuba umahluko ungaphezulu kwe-ma rating ye-RCD okanye ye-RCBO, iya kuhamba.
Kwiimeko ezininzi, ukuvuza kuya kusebenza njengoko kulindelekile, kodwa ngamanye amaxesha i-RCD okanye i-RCBO iya kuqhubeka nokuhamba ngaphandle kwesizathu-olu "luhambo olucaphukisayo". Eyona ndlela yokusombulula le ngxaki kukusebenzisa imitha yokulinganisa ukuvuza, njengeMegger DCM305E. Oku kuxinzelelwe malunga nocingo kunye nomqhubi ongathathi hlangothi (kodwa kungekhona umqhubi okhuselayo!), Kwaye ilinganisa ukuvuza komhlaba ngoku.
Ukumisela ukuba yeyiphi isekethe ebangele uhambo olungeyonyani, cima zonke ii-MCBs kwiyunithi esetyenziswayo yombane kwaye ubeke isibambiso sokuvuza komhlaba malunga nentambo yombane. Vula isekethe nganye ngokulandelelana. Ukuba ibangela ukwanda okukhulu kokuvuza, oku kunokuba yingxaki yesiphaluka. Inyathelo elilandelayo kukuqinisekisa ukuba ukuvuza bekungabom na. Ukuba kunjalo, uhlobo oluthile lokusabalalisa umthwalo okanye ukuhlukana kweesekethe kuyadingeka. Ukuba yinto evuzayo engaqondanga—umphumo wokusilela—ukusilela kumele kufunyanwe kuze kulungiswe.
Ungalibali ukuba ingxaki inokuba yi-RCD engalunganga okanye i-RCBO. Ukujonga, yenza uvavanyo lwe-RCD ye-ramp. Kwimeko yesixhobo se-30 mA-esona silinganisi siqhelekileyo-kufuneka sihambe phakathi kwe-24 kunye ne-28 mA. Ukuba ikhubeka ngomsinga osezantsi, inokufuna ukutshintshwa.