UF-B (hauv qab Felerer - Ceg-B (tsis paub yog tias muaj ob lub npe nrov nrov
The answer to this question is not a simple "yes" or "no", but requires in-depth analysis from multiple dimensions. Understanding the correct use of these two cables is not only related to the normal operation of the electrical system, but also directly affects the safety and service life of the building. The wrong cable selection may lead to safety hazards, violation of building codes, and even cause serious electrical fires. Yog li ntawd, qhov no zoo li qhov kev hloov pauv yooj yim tiag tiag yuav tsum muaj kev soj ntsuam kev nyuaj thiab kev txiav txim siab tshaj lij {}}
{{01. Cov Qauv Yooj Yim thiab Cov yam ntxwv ntawm UF-B Hlau thiab NM-B Hlau
1.1 Kev Ntsuas Hauv Phaj Ntawm UF-B
Lub npe tag nrho ntawmUF-B HlauPuas yog cov khoom noj nyob hauv av - Ceg Circuit Court . Cov ntaub ntawv tso tawm rau cov khoom lag luam hauv av, UF-B
Cov khoom siv: thickened PVC (polyvinyl chloride) yog cov khoom siv hluav taws xob tshwj xeeb thiab tuaj yeem tiv thaiv kev ua kom zoo nkauj ua kom muaj kuab lom
Kev Tiv Thaiv Tus Qhwv: Tsis zoo li NM-B, cov tshuaj insath ua tiav tau kom muaj kev haus dej haus lossis yas ua kom muaj kev sib xyaw ua ke, tab sis kuj ua rau cov cable nyuaj.
Cov cim cim npe: Txheem UF-BAB-feem ntau muaj cov xim grey (dub-liab-dawb-ntsuab, thiab lwm yam} {}
Kev Ntsuas Kub: Cover Bury Bury UF B Cable feem ntau muaj rau 90℃(167℃F) ntub dej ib puag ncig, uas yog piv rau NM-B.
1.2 Kev Taw Qhia Rau NM-B Cable
NM-B COOM, feem ntau hais txog kev ua lag luam raws li Romex® (txawm hais tias lub tuam txhab ua lag luam hauv qab zib), yog cov xaim hluav taws xob rau hauv North America:
Tsho tiv thaiv khoom: Txheem PVC lub tsho loj, tsis muaj qhov tseeb tshwj xeeb thiab muaj kev cuam tshuam ntau dua, tab sis kuj tseem txwv nws qhov kev siv ib puag ncig {{}
Cov qauv hauv sab hauv: muaj 2-4 tus qauv insulated (tooj liab), tab sis tsis zoo noo noos.
Cov xim xim coding: NM-B hlau ntawm cov sib txawv sib txawv tawv tawv tawv rau cov cim qhia tawv nqaij: NM-B 10WM yog xim dub, thiab lwm yam.
Qhov ntsuas kub: tib yam li UF-B, ntsuas rau 90℃qhuav ib puag ncig, 75℃ntub ib puag ncig {}}
2. Kev Tsom xam cov ntsiab lus tseem ceeb
2.1 Txiaj Ntsig Sib Txawv hauv noo noo
Kev ya raws ya raws li yog qhov tseem ceeb tshaj plaws uas tau txiav txim siab qhov txawv ntawm UF-B. bill tso cai rau nws tau siv ncaj qha rau hauv cov chaw ib puag ncig hauv qab no:
Kev pw hauv av (ncaj qha faus hauv av)
Cov av ntub dej ntub lossis cov chaw nkag
Sab nraum zoov kis cov chaw ib puag ncig (xws li vaj teeb teeb pom kev zoo)
Lwm qhov chaw uas yuav raug dej
Hauv kev sib piv, noo noo tsis kam ntawm NM-B yog tsawg heev:
Muaj feem xyuam rau cov chaw nyob sab hauv
Tsis tuaj yeem ncaj ncaj
Tsis tuaj yeem ua rau huab cua noo rau lub sijhawm ntev
Kev teeb tsa sab nraum zoov yog txwv
Qhov no sib txawv los ntawm cov khoom xaiv thiab cov qauv tsim qauv {{} Cov qauv tuab los rau cov txheej txheem noo noo ntawm nm-b {{4}
2.2 Cov Khoom Siv Neeg Kho Tshuab thiab Txhim Kho Cov Qauv
Nyob rau hauv cov nqe lus ntawm cov neeg kho tshuab, ob lub cables ua kom pom qhov sib txawv:
Yooj Yim: NM-B CABLE muaj qhov cub tawg me me vim nws txoj kev sib tw nyob hauv qhov chaw nyob hauv qab.
Compressive lub zog: UF-B CABLE cov tuab ua kom zoo dua compressive compressive compressive compressive thiab puas rau hauv ib puag ncig compressive (xws li hauv av).
Tensile lub zog: tsis siv cable yog haum rau siv ua kev txhawb nqa cable, tab sis UF-B tuaj yeem tiv taus me ntsis ntau dua .
Cov khoom siv neeg kho tshuab no sib txawv cuam tshuam rau txoj kev teeb tsa thiab kev tsim kho {}}} nrawm dua li UF-b.
3.} cov ncauj lus piav qhia ntawm cov kev qhia tshwj xeeb thiab kev ua kom muaj kev nyab xeeb
3.1 cov kev cai tshwj xeeb ntawm NEC cov lus qhia tshwj xeeb
Lub Tebchaws Hluav Taws Xob Hluav Taws Xob (NEC) ntawm Tebchaws Meskas muaj cov kev cai ntshiab rau kev siv ob lub cable no:
UF-B Hlau(Tshooj 340):
Tso cai rau siv rau hauv ntau lub nroog thiab chaw sab nraum zoov
Tuaj yeem raug faus ncaj qha (raug rau qhov tsawg kawg nkaus faus faus rau)
Tuaj yeem siv nyob rau hauv cov damp, ntub thiab cov chaw qhuav
Yuav tsum tau kho rau kev nqa khoom tam sim no raws li 310.15 (b) (3) (a)
NM-B Hlau(Tshooj 334):
Txwv rau cov chaw qhuav
Txwv tsis pub siv hauv cov chaw ib puag ncig hauv qab no:
Ntub Dej lossis Damp Chaw
Teb
Kev lag luam garages
Cov chaw tshwj xeeb xws li mauv vim
Ib puag ncig saum 80 degree
Yuav tsum muab ntsia rau hauv ib qho chaw uas nws yuav tsis muaj lub cev puas
3.2 Cov cai yuav tsum muaj ntawm cov cai hauv zos
Ntxiv rau qhov tseem ceeb ntawm NEC, muaj ntau txoj cai hauv zos yuav muaj kev cai ntxiv:
Qee thaj chaw txwv tsis pub siv NM-B hauv thaj chaw nyob
Seismic yuav xav tau kev ntsuas ntxiv
Muaj qee lub nroog muaj cov kev cai tshwj xeeb rau kev sib tw sab nraum zoov
Ua ntej kev tsim kho hluav taws xob, txoj cai hluav taws xob tsis muaj kev sib tham txog kev ua tsis tau lossis kev nyab xeeb rau kev nyab xeeb .