Txij li thaum nws thawj qhov yuav tsum tau muaj 50 xyoo dhau los, Ground Fault Circuit Interrupter (GFCI) tau dhau los ua ntau yam kev tsim kho kom nce kev tiv thaiv cov neeg ua haujlwm.Cov kev hloov pauv no tau tshwm sim los ntawm cov tswv yim los ntawm cov koom haum xws li Consumer Products Safety Commission (CPSC), National Electrical Manufacturers Association (NEMA), thiab Underwriters Laboratories.
Ib qho ntawm cov qauv no, UL 943, muab cov kev cai tshwj xeeb rau hauv av-kev ua txhaum Circuit Court-interrupters uas ua raws li cov cai tswj hluav taws xob ntawm Canada, Mexico, thiab Tebchaws Meskas.Thaum Lub Rau Hli 2015, UL tau hloov kho lawv cov txheej txheem 943 kom xav kom txhua qhov chaw nyob ruaj khov (xws li cov chaw txais khoom) suav nrog kev saib xyuas nws tus kheej.Cov neeg tsim khoom muaj peev xwm muag cov khoom lag luam uas twb muaj lawm rau lawv cov neeg siv khoom, nrog rau lub hom phiaj yog tias cov chav qub qub tau raug tshem tawm, lawv cov kev hloov pauv yuav suav nrog qhov kev ntsuas kev nyab xeeb ntxiv.
Kev tshuaj xyuas nws tus kheej, tseem hu ua kev kuaj tus kheej, hais txog cov txheej txheem uas ua kom lub tsev ua haujlwm tau zoo los ntawm kev lees paub qhov kev nkag siab thiab lub peev xwm mus ncig ua haujlwm.Qhov kev ntsuam xyuas tus kheej no ua kom ntseeg tau tias GFCI raug sim tsis tu ncua, uas yog qee yam uas cov neeg siv tsis tshua ua.Yog tias qhov ntsuas tus kheej ua tsis tiav, ntau GFCI kuj tseem muaj qhov ntsuas qhov kawg ntawm lub neej kom ceeb toom tus neeg siv kawg thaum lub tsev xav tau hloov.
Qhov thib ob ntawm qhov hloov kho UL 943 txoj cai rov qab Rov Qab Kab-load Mis-wire Protection.Kab-Load reversal cuam tshuam lub zog rau lub tsev thiab tiv thaiv kev rov pib dua thaum muaj teeb meem nrog cov xaim.Txawm hais tias chav tsev tau raug siv thawj zaug los yog rov nruab, ib qho kev xaim tsis raug rau GFCI kev kuaj tus kheej yuav ua rau lub zog poob thiab / lossis tsis muaj peev xwm rov pib dua cov cuab yeej.
Raws li lub Tsib Hlis 5th, 2021, UL 943 xav kom cov khoom siv hauv cov ntawv thov nqa tau (In-line GFCI cordsets thiab Portable Distribution Units, piv txwv li) suav nrog kev ntsuas pib siv tshuab txhawm rau txhim kho cov neeg ua haujlwm thiab kev nyab xeeb ntawm chaw ua haujlwm.
Post lub sij hawm: Sep-05-2022