Puas yog LED sawb teeb yuav tsum muaj cov npe UL?

Yog tias koj muaj kev paub txog kev siv hluav taws xob thiab teeb pom kev zoo, koj yuav tau ntsib qhov zoo - paub UL cim. Raws li cov khoom siv hluav taws xob tsawg, koj tuaj yeem nug seb puas yog12V thiab 24V LED stripsraug zam los ntawm UL daim ntawv teev npe. Mus nyeem ntawv mus nrhiav tau!

Daim ntawv teev npe UL txhais li cas?

UL, yav dhau los hu ua Underwriters Laboratory, yog ib lub koom haum uas tsim cov qauv kev nyab xeeb ntawm cov khoom thiab ua cov kev ntsuam xyuas kom paub tseeb tias ua raws li cov qauv no. Thaum UL tsim ntau tus qauv, lwm qhov Kev Tshawb Fawb Kev Tshawb Fawb Hauv Tebchaws (NRTL) kuj muaj peev xwm ua qhov kev ntsuam xyuas raws li cov qauv UL tib yam. Vim tias cov nqi qis dua thiab cov sijhawm ua haujlwm sai tau muab los ntawm cov NRTLs lwm txoj hauv kev, ntau lub tuam txhab feem ntau xaiv qhov kev xaiv no. Lwm lub koom haum kuaj thiab ntawv pov thawj, xws li ETL thiab TUV, yuav raug ntsib.
Thaum xa cov khoom rau kev kuaj los ntawm cov chaw tsim khoom, cov khoom raug soj ntsuam raws li tus qauv UL siv tau raws li nws cov qeb . 12V thiab 24V LED strips raug cais raws li tus qauv UL2108, hais txog Cov Hluav Taws Xob Hluav Taws Xob Hluav Taws Xob. Thaum ua tiav qhov kev xeem tiav, cov khoom raug suav tias yog "sau npe" thiab yuav dais cov cim tsim nyog rau kev txheeb xyuas. Lub logo UL lossis ETL, nrog rau tus lej xov tooj, feem ntau yog luam tawm ncaj qha rau ntawm qhov chaw ntawm LED sawb substrate.
 

Leej twg lees tiasLED stripsYuav tsum tau UL daim ntawv teev npe?

Hauv Tebchaws Meskas, ua ntej pib qhov kev tsim kho uas muaj cov tsev kho mob tshiab lossis kev kho dua tshiab, yuav tsum tau ua cov txheej txheem kev tso cai thiab tshuaj xyuas. Cov kev tshwj xeeb thiab cov tub ceev xwm Lub Tuam Txhab Muaj Kev Txiav Txim Siab (AHJ) yuav txawv raws cheeb tsam thiab cheeb tsam, tab sis feem ntau yuav xa mus rau National Electric Code (NEC), uas tsim cov qauv yam tsawg kawg nkaus rau kev tiv thaiv tib neeg thiab khoom ntawm kev puas tsuaj thiab kev puas tsuaj cuam tshuam nrog kev siv hluav taws xob.
Tshooj 411 ntawm NEC qhia txog cov kev qhia tshwj xeeb rau cov teeb pom kev zoo ua haujlwm ntawm lossis qis dua 30 volts, txuas nrog rau Chav Kawm 2 lub zog (tsawg dua 100W).
Tshooj 411 hais tias cov teeb pom kev zoo ua haujlwm ntawm 30 volts lossis qis dua yuav tsum ua raws li 411.3(A) lossis 411.3(B).
(A) Qhov System Enumerated. Lub teeb pom kev zoo ua haujlwm ntawm 30 volts lossis qis dua yuav tsum tau muab cais ua qhov ua tiav. Lub luminaires, fais fab mov, thiab luminaire fittings, nrog rau cov liab qab conductors, ntawm ib tug liab qab conductor teeb pom kev zoo yuav tsum tau ntawv pov thawj rau siv raws li cov khoom ntawm tib lub teeb pom kev zoo.
Kev sib dhos ntawm Cov Txheej Txheem Tsim. Lub teeb pom kev zoo tsim los ntawm cov khoom siv tshwj xeeb yuav tsum tau tso cai:
Tsawg-voltage teeb pom kev zoo
Tsawg-voltage luminaire fais fab mov
Class 2 fais fab mov
Tsawg-voltage luminaire fixtures
Secondary circuit cord raug xaiv los siv nrog cov teeb pom kev zoo thiab cov khoom siv hluav taws xob.
Cable, conductors nyob rau hauv conduit, los yog lwm txoj kev ruaj ruaj txoj kev rau lub thib ob Circuit Court
Lub luminaires, fais fab mov, thiab luminaire fittings, nrog rau cov liab qab conductors, ntawm ib tug liab qab conductor teeb pom kev zoo yuav tsum tau ntawv pov thawj rau siv raws li cov khoom ntawm tib lub teeb pom kev zoo.
LED sawb teeb yuav tsum tau ntawv pov thawj (UL / ETL los yog sib npaug) raws li ib feem ntawm lub teeb pom kev zoo (xws li,LED sawb teeb pom kev zoocov khoom siv) los yog ib tus zuj zus teev raws li cov khoom ntawm ib qho kev sib dhos.
 

YogLED stripsKev zam los ntawm UL cov cai hauv qab NEC vim lawv qhov kev faib tawm raws li Chav Kawm 2?

Chav Kawm 2 yog hais txog cov khoom siv hluav taws xob uas muaj kev txwv rau qhov siab tshaj plaws ntawm 60V DC thiab lub zog txwv ntawm 100W. Yog li ntawd, qhov kev pheej hmoo ntawm hluav taws xob poob siab thiab hluav taws kub tau txo qis rau Class 2 circuits hauv kev sib piv rau cov uas txuas ncaj qha rau tus qauv 120V / 240V AC mains fais fab mov. Cov kev ceev faj txog kev nyab xeeb uas yuav tsum tau muaj yog qhov tsis sib xws, raws li tau teev tseg hauv NEC Tshooj 725, uas qhia meej txog cov kev tso cai ntawm cov xov hlau thiab txoj kev sib txuas.
Muaj qhov tsis txaus ntseeg ntawm ib qho kev tso npe zam cov khoom hauv Chav Kawm 2 Circuit Court los ntawm qhov tsim nyog ntawm kev teev npe. UL508A feem ntau qhia tsis tseeb raws li muaj feem xyuam rau cov teeb pom kev zoo; Txawm li cas los xij, tus qauv no tsuas yog cuam tshuam rau kev lag luam tswj vaj huam sib luag.
Kev ua raws li NEC cov kev cai qhia tau hais tias LED strips raug rau UL daim ntawv teev cov cai, nrog UL2108 (IFDR) yog tus qauv siv rau kev ntsuasLED sawb cov khoom.
Cov kev txwv ntawm NEC cov cai thiab cov xwm txheej uas UL cov npe tsis tsim nyog rau LED strips
Nws yog ib qho tseem ceeb kom paub tias NEC cov kev cai thiab cov kev cai yuav tsis raug cai, yog li ua rau kev teeb tsa ntawm tsis yog - teev LED strips raug cai. Daim ntawv tso cai tsim kho thiab kho dua tshiab tau pom zoo, thiab kev teeb tsa raug tshuaj xyuas los ntawm cov cai muaj feem cuam tshuam (AHJ). Kev txhais thiab kev tswj hwm ntawm NEC hauv paus yog nyob ntawm AHJ.

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