Ukusukela oko yayifuneka okokuqala kwiminyaka engama-50 eyadlulayo, iGround Fault Circuit Interrupter (GFCI) iye yaphuculwa ngeendlela ezininzi zokwandisa ukhuseleko lwabasebenzi.Olu tshintsho luhlaziywe ngamagalelo avela kwimibutho efana neKomishoni yoKhuseleko lweeMveliso zoMthengi (CPSC), i-National Electrical Manufacturers Association (NEMA), kunye ne-Underwriters Laboratories.
Enye yale migangatho, i-UL 943, ibonelela ngeemfuno ezikhethekileyo kwiziphazamisi zesekethe eziphantsi komhlaba ezithobela iikhowudi zofakelo lombane zaseCanada, eMexico, nase-United States.NgoJuni ka-2015, i-UL yalungisa indlela yabo engama-943 ukuze ifune ukuba zonke iiyunithi ezifakelwe ngokusisigxina (ezifana nezixhobo zokwamkela) ziquka umsebenzi wokuhlola ngokuzenzekelayo.Abavelisi babenakho ukuthengisa isitokhwe esele sikhona kubathengi babo, ngenjongo yokuba njengoko iiyunithi ezindala zipheliswa, ukutshintshwa kwazo kuya kubandakanya lo manyathelo okhuseleko ongezelelweyo.
Ukujongwa ngokuzenzekela, okwakwaziwa ngokuba yi-self-testing, kubhekiselele kwinkqubo eqinisekisa ukuba iyunithi isebenza ngokufanelekileyo ngokuqinisekisa ngokuzenzekelayo ukuva kunye nokubanakho ukuhamba kuyasebenza.Oku kuzivavanya kuqinisekisa ukuba ii-GFCIs zivavanywa rhoqo, nto leyo abasebenzisi abangafane bayenze.Ukuba uvavanyo lobuqu aluphumeleli, uninzi lwe-GFCI lukwabonisa isalathiso sokuphela kobomi ukwazisa umsebenzisi wokugqibela xa iyunithi ifuna ukutshintshwa.
Umba wesibini wohlaziyo lwe-UL 943 izigunyaziso eziphindaphindayo uReverse Line-load Mis-wire Protection.Ukubuyisela umva koMlayisho weLayini kuthintela amandla kwiyunithi kwaye kuthintele ukusetwa kwakhona xa kukho umba ngocingo.Nokuba iyunithi isetyenziswa okokuqala okanye iphinda ihlohlwe, naluphi na ucingo olungachanekanga kwi-GFCI yokuzivavanya luya kukhokelela ekulahlekeni kombane kunye/okanye ukungakwazi ukusetwa ngokutsha isixhobo.
Ukusukela nge-5 kaMeyi, 2021, UL 943 ifuna ukuba iimveliso ezisetyenziswa kwizicelo eziphathwayo (Ii-cordset ze-GFCI ezikwi-intanethi kunye neeYunithi zoSasazo eziphathwayo, umzekelo) zibandakanye ubuchwepheshe bokuvavanya i-auto ukunyusa ngakumbi ukhuseleko lomsebenzi kunye nendawo yokusebenza.
Ixesha lokuposa: Sep-05-2022