1. Lub luag haujlwm ntawm UL ntawv pov thawj
1.1 Cov Ntsiab Lus Txheej Txheem ntawm UL Daim Ntawv Pov Thawj
UL (Underwriters Chaw soj ntsuam) yog ib qho ntawm cov koom haum kev nyab xeeb tshaj plaws hauv ntiaj teb. UL ntawv pov thawj tsuas yog kuaj nruj ntawm kev nyab xeeb cov khoom lag luam, kev ua haujlwm hluav taws xob, thiab hluav taws xob ua haujlwm.
UL ntawv pov thawj tsuas yog muaj cov hauv qab no:
UL muaj npe: Cov khoom ua raws li cov qauv uas muaj UL ntsig txog cov qauv thiab tuaj yeem siv rau kev teeb tsa zaum kawg.
UL lees paub: feem ntau siv tau ntawm qib tivtentent, tsis yog cov khoom kawg.
UL Cov neeg faib: ntawv pov thawj rau cov hom phiaj tshwj xeeb.
1.2 Qhov cuam tshuam ntawm UL daim ntawv pov thawj hauv kev lag luam cable
UL daim ntawv pov thawj ntawm cov khoom cable feem ntau suav nrog cov hauv qab no:
Kev Tawm Hluav Taws Xob Ua Tau Zoo: Ua tau raws li qhov hluav taws kub tiv thaiv kev ntsuam xyuas hauv NFPA 70 National Electrical code (NEC).
Kub Kuj: Ua haujlwm ruaj khov ntawm cov cable tsis pub dhau qhov ntsuas kub ntau yam.
Cov cuab yeej kho tshuab: xws li cuam tshuam tsis kam, tensile tsis kam, thiab hnav tsis kam.
Kev ua hluav taws xob: Xyuas kom meej tias cov hluav taws xob tsis sib xws ntawm cov kev sib txuas ntawm cov yas ua kom tau raws li cov qauv tsim, xws li kev ntsuas hluav taws xob, thiab cov rwb thaiv tsev tsis kam.
UL ntawv pov thawj ua si lub luag haujlwm tseem ceeb hauv kev txhim kho kev ua lag luam sib tw ntawm cov khoom lag luam cable, ua raws li kev tswj cable, thiab ua kom muaj kev nyab xeeb.
2.doesMC CableYuav tsum tau ua raws li UL daim ntawv pov thawj?
2.1 Kev tswj hwm thiab qauv yuav tsum tau ua
Seb MC CABLE yuav tsum ua raws li UL ntawv pov thawj feem ntau yog nyob ntawm lawv daim ntawv thov cov xwm txheej thiab cov kev cai tswjhwm zos. Ntawm no yog qee cov qauv tseem ceeb:
NEC (National Electrical Code): NICK QHIA TXOG KEV SIV NOJ THIAB KEV UA SI
OSHA (Kev Ua Haujlwm Kev Nyab Xeeb thiab Kev Noj Qab Haus Huv): OSHA cov cai hauv Tebchaws Meskas yuav tsum tau siv ua lag luam thiab kev lag luam ib puag ncig kom ua raws li UL lossis lwm cov qauv kev lees paub.
Cov Kev Cai Tsim Tsev Lub Tsev Hauv Zos: Cov xeev sib txawv thiab cov nroog uas yuav muaj cov ntawv pov thawj sib txawv rau MC cables. Qee thaj chaw nyob rau nruj me ntsis yuav tsum tau txais daim ntawv pov thawj tau UL daim ntawv pov thawj, thaum lwm tus cia siv cov khoom lag luam uas ua raws li NEC tab sis tsis tau hloov tau.
2.2 Nyob rau hauv dab tsi muaj xwm txheej yog UL daim ntawv pov thawj uas xav tau?
Feem ntau hais lus, MC cables yuav tsum tau ua raws li UL cov ntawv pov thawj hauv cov xwm txheej hauv qab no:
1.Txoj kev lag luam thiab cov phiaj xwm lag luam: Ntau lub tsev lag luam thiab cov chaw ua lag luam yuav tsum tau siv cov ntawv pov hwm thiab kev nyab xeeb.
2. Siv cov phiaj xwm tsoomfwv lossis cov phiaj xwm thoob plaws: Tsoomfwv cov khoom siv hluav taws xob kom ua raws li cov qauv hluav taws xob kom ntseeg tau tias zoo thiab kev nyab xeeb.
3.Qhov chaw uas xav tau kev tshuaj xyuas thiab cov tuam txhab tuav pov hwm thiab cov chaw muaj kev nyab xeeb kom txo qis kev pheej hmoo ntawm hluav taws thiab hluav taws xob.
4.YAVE muaj kev pheej hmoo lossis cov chaw tshwj xeeb, cov chaw zov me nyuam, tsev kho mob, yuav tsum muaj cov thaiv hluav taws thiab lwm yam xav tau ntawm Um daim ntawv pov thawj.
2.3 Nyob rau hauv dab tsi muaj xwm txheej tuaj yeem tau txais ntawv pov thawjMC CABLEtsis siv?
Tsis yog txhua lub sijhawm yuav tsum tau txais daim ntawv pov thawj, thiab MC cov ceg yuav tsis xav tau rau cov ntawv pov thawj rau cov hauv qab no:
1. Muaj qee cov phiaj xwm nyob hauv thaj chaw: Qee lub tsev nyob rau kev siv cov qoob loo uas ua raws li NEC tab sis tsis tau zoo thiab ua tau zoo thiab ua tau zoo ua ntej cov tshuaj hluav taws xob hauv nroog.
2. Txhais tau siv daim ntawv thov tseem ceeb: yog MC cables tsuas yog siv rau sab hauv cov khoom siv tsis tseem ceeb thiab tsis txhob koom nrog hluav taws lossis kev nyab xeeb, UL yuav tsis raug lees paub.
3.Txhais cov khoom: Qee cov MC Cab Cabe exported rau kev ua lag luam txawv teb chaws yuav tas ua pov thawj los ntawm lwm lub teb chaws (xws li tau ntawv pov thawj CE) hloov chaw.
3.Txoj kev ua qauv rauMC Cable
Yog tias MC Cables yuav tsum tau txais UL cov ntawv pov thawj, feem ntau lawv yuav tsum tau mus los ntawm cov kauj ruam hauv qab no:
1.Application: Cov chaw tsim khoom xa cov ntawv pov thawj ua pov thawj rau UL, muab cov ntaub ntawv tshwj xeeb cov khoom lag luam thiab cov ntaub ntawv qhia cov tswv yim.
2.Sample kuaj: ul ua cov tshuab hluav taws xob, hluav taws xob, thiab kev ntsuam xyuas hluav taws xob.
3.Factist soj ntsuam: UL ua kev soj ntsuam kev tshuaj xyuas cov chaw tsim khoom kom paub meej tias cov kev tswj hwm kev tswj hwm tau raws li cov cai.
4.Certification Tso Tawm: Yog tias kuaj xyuas thiab tshuaj xyuas tau ntawv pov thawj, tso cai rau cov khoom siv siv lub logo ulo.
5.Cov khoom saib xyuas: TM tsis tu ncua cov tshuab tsim khoom lag luam cov khoom lag luam thiab cov txheej txheem ntau lawm los ua raws li cov qauv ntawv pov thawj.
