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Chitupa cheUL chitupa chisina kusungirwa muUnited States, kunyanya kuyedza nekusimbisa mashandiro ekuchengetedza kwechigadzirwa, uye chiyero chayo chechitupa hachisanganisire hunhu hweEMC (electromagnetic compatibility) hwezvigadzirwa. UL isangano rehunyanzvi rakazvimirira, risiri rekutsvaga purofiti, rinoedza kuchengetedzeka kweveruzhinji. UL yakavambwa muna 1894. Pakutanga, UL yainyanya kuvimba nemari yaipihwa nedhipatimendi reinishuwarenzi yemoto kuti irambe ichishanda. UL yakatozove yakazvimirira zvizere muna 1916. Mushure memakore anoda kusvika zana ekuvandudzwa, UL yave sangano rechitupa rine mukurumbira pasi rose rine masisitimu akaomarara ekutonga masangano, maitiro ekuvandudza akajairwa uye maitiro echitupa chechigadzirwa.
Chitupa cheUL chakavambwa nesangano rekupa chitupa, sangano rekusimudzira mitemo, sangano remapazi, sangano remapazi. 1894, uye UL ndiyo zvakare inovandudza mwero wenyika yeCanada.
Kuwana Chitupa cheUL kwakakosha nekuti kunoratidza hunyanzvi hwemugadziri nevanopa masevhisi. Vatengi vanoda kuziva kuti kambani yavanotora basa rekuisa michina yavo inokwanisa kuita basa nemazvo, uye kuti vanotora nguva yekuona kuti zvigadzirwa zvese zvavanoisa zvakaedzwa uye zvinosangana nezvinodiwa zvekuchengetedza. Chitupa cheUL chinoratidzawo kuti kambani inosangana nemitemo yese yekuchengetedza yemuno neyehurumende. Unogona kuva nechokwadi chekuziva kuti vashandi vako nevatengi vakachengeteka.
Chiratidzo cheUL Verification Mark chinopa bvunzo dzesainzi dzevamwe vanhu uye chinoratidza zvichemo zvekushambadzira zvevagadziri vezvigadzirwa zvavo, zvakaita sekushanda kwechigadzirwa, mhando, uye mashandiro azvo.
1. Chigadzirwa ichi chinoshandisa nzira dzakasiyana-siyana dzekuchengetedza chigadzirwa; kana vatengi nemayuniti vakasarudza chitupa chechigadzirwa cheUS, zviri nyore kusarudza mamaki echigadzirwa nemusika wese.
2. Nhoroondo yeUL ine nhoroondo yemakore anopfuura zana. Mufananidzo wako wakadzika midzi muvatengi nehurumende. Kana usingatengese zvigadzirwa kune vatengi, uchazoda kuti zvigadzirwa zvive nesitifiketi yeUL, kuitira kuti zvigadzirwa zvidzokororwe.
3. Vatengi vekuAmerica nemakambani ekutenga vane chivimbo chakawanda nezvigadzirwa zvekambani.
4. Kune matunhu anodarika 40,000 ekutonga muhurumende dzeUnited States dzemubatanidzwa, dzematunhu, dzematunhu, nedzemaguta, dzese dzinoziva chiratidzo cheUL certification.
Chitupa cheUL chakawanikwa nezvigadzirwa zveSoloon chakakosha zvikuru pakutengeswa kwezvigadzirwa zvedu muUnited States, Canada nedzimwe nyika.
