UL luv luv rau Underwriters Laboratories Inc. UL-cov ntaub ntawv pov thawj yog cov davhlau ya nyob twg uas tau dhau UL kev ntsuam xyuas kev nyab xeeb. Qee lub terminals tau dhau UL kev kuaj xyuas kev nyab xeeb. UL yog lub koomhaum tshwj xeeb tshaj plaws thiab loj tshaj plaws hauv Tebchaws Meskas thiab lub ntiaj teb koom nrog kev kuaj kev nyab xeeb thiab ntawv pov thawj. Nws yog ib lub koom haum ywj pheej, tsis yog - cov koom haum tshaj lij tshaj lij rau kev sim rau pej xeem kev nyab xeeb. Nws siv cov kev sim kev tshawb fawb los kawm thiab txiav txim siab txog qhov muaj peev xwm thiab qib ntawm kev puas tsuaj rau lub neej thiab khoom siv los ntawm ntau yam khoom siv, khoom siv, khoom siv, khoom siv, thiab vaj tse; nws tsim, sau, thiab tshaj tawm cov qauv thiab cov ntaub ntawv cuam tshuam los pab txo thiab tiv thaiv kev poob ntawm lub neej thiab khoom; thiab nws ua kev tshawb fawb qhov tseeb.
UL tus tsim, William Henry Merrill, tau tsim lub Underwriters Electrical Bureau, tus thawj coj ntawm Lub Chaw Haujlwm Hluav Taws Xob ntawm National Board of Fire Underwriters. Thaum Lub Peb Hlis 24, 1894, Lub Tsev Haujlwm tau ua thawj zaug ntawm Mr. Shields 'tsis yog-cov khoom siv hluav taws xob hluav taws xob. 1895: Thawj Xyoo Kev Tshawb Fawb UL tsuas muaj peb tus neeg ua haujlwm puv sijhawm - sijhawm, nyiaj txiag txhua xyoo ntawm $ 3,000, thiab tau tshaj tawm 75 tsab ntawv ceeb toom rau cov neeg siv khoom.
