1. Dabtsi yog khoov cov qauv hluav taws xob rau MC cables
1.1 NEC (National Electrical Code) Xav Tau
Raws li lub tebchaws hluav taws xob (NEC), qhov tsawg kawg yog khoov hluav taws xob ntawm MC cables yog nyob ntawm txoj kab uas hla thiab cov qauv ntawm txoj hlua. Feem ntau, NEC 330.24 tshooj muab cov lus qhia hauv qab no:
Hlau clad cable (MC): Kev khoov lub vojvoog yuav tsum tsis pub tsawg tshaj 7 npaug ntawm lub taub sab nraud ntawm lub cable (muaj feem rau MC cables nrog aluminium sheaths).
Yog tias MC cable suav nrog cov ntaub pua plag hauv qab (xws li siv hluav taws xob txuas ntxiv), kev yuav tsum tau ua rau cov chaw tsim khoom tshwj xeeb.
1.2 UL (Underwriters Chaw soj nstuam) cov qauv
Cov Underwriters Chaw soj ntsuam (UL) hauv Tebchaws Meskas kuj tau muab tso rau tom ntej yuav tsum tau ua rau kev khoov hluav taws xob ntawm MC cables. UL 1569 cov ceg ntoo uas MC Cables yuav tsum muaj qhov yooj yooj ywm thiab tsis muaj kev puas tsuaj los ntawm kev lag luam zoo heev.
2. Xam qhov tsawg kawg ntawm kev khoov hluav taws xob ntawmMC Cable
Qhov kev suav ntawm qhov tsawg kawg yog khoov hluav taws xob rau MC cables feem ntau yog raws li cov qauv hauv qab no:
Tsawg kawg li cas yog khoov radius (r)=Cable streter incium (d) coefficient (k)
Ntawm lawv:
D yog lub taub sab nraud ntawm MC cable (hauv millimeters lossis nti).
K yog tus khoov coefficient tau teev los ntawm nec lossis cov chaw tsim khoom, feem ntau yog 7.
Piv txwv li:
Ib qho MC cable nrog ib txoj kab uas hla ntawm 1 nti (25.4mm) muaj qhov tsawg tshaj plaws khoov hluav taws xob ntawm:
R =1 × 7=7 nti (177.8mm)
Yog tias txoj kab uas hla sab nraud ntawm lub cable yog 2 nti, qhov tsawg tshaj plaws khoov hluav taws xob yog:
R {=2 × 7=14 nti (355.6mm)
Yog li ntawd, thaum lub sijhawm tsim qauv, MC cables yuav tsum tau khoov tsawg kawg raws li lub vojvoog no kom tsis txhob ua rau ua kom lub zog ua kom tsis txhob ua rau cov CABLE.
3. Qhov ntau yam cuam tshuam rau khoov cov vojvoog ntawm MC cables
3.1 cable qauv
Cov Qauv Qauv: Tooj cov neeg xyuas khoom yog hloov tau yooj yim dua li txhuas cov neeg coj mus nrog cov taub uas ib txwm muaj hluav taws xob me dua.
SHOORCE HOM: MC CABLE NROG PVC lossis XLPE Rwb thaiv tsev tej zaum yuav muaj kev sib txawv, uas tuaj yeem cuam tshuam tus nqi siv hluav taws xob khoov.
3.2 Txoj Kev Txhim Kho
Los ntawm phau ntawv khoov ntawm cov neeg kho tshuab xaws: thicker mc clesnes feem ntau yuav tsum tau siv cov cuab yeej tshwj xeeb, thaum uas thabis cables tuaj yeem ua manually.
Txhim kho txoj kev: Thaum txhim kho MC cable, yog tias kev kho yog nruj heev, nws yuav cuam tshuam rau kev khoov kev ua tau zoo ntawm cable.
3.3 Kev khiav hauj lwm ib puag ncig
Qhov kub thiab txias: ib puag ncig kub tsawg yuav ua rau MC cables nkig thiab nce qhov nyuaj ntawm khoov.
Sab nraud siab: Thaum dabtsi yog khoov Mc cocables nyob rau hauv qhov chaw nqaim, ntau dhau lawm compression lossis rub cov cable yuav tsum zam kom tsis txhob ua kom lub rwb thaiv tsev txheej.
4. Cov ntaub ntawv thov siv
4.1 Kev teeb tsa ntawm MC cables hauv cov chaw muaj chaw lag luam
Hauv cov chaw muaj kev nyab xeeb, MC clesles siv tau siv ntau rau cov hluav taws xob hluav taws xob cables lossis tswj cables. Thaum lub sij hawm npaj kev teeb tsa, nws yog feem ntau tsim nyog yuav tsum tau tshwj tseg qhov chaw txaus raws li cov kab ke uas yog li cov kab ke tuaj yeem npaj raws li kev siv hluav taws xob kom raug.
4.2 MC CABLE RAU HAUV LUB TSEV KAWM NTAWV
Nyob rau hauv cov tsev lag luam xws li cov vaj tse chaw haujlwm lossis khoom lag luam, MC cable yog feem ntau ntsia rau hauv cable cov tais, cov raj kav hlau, lossis av av. Hauv cov ntawv thov cov xwm txheej no, nws yog ib qhov tsim nyog los xyuas kom meej tias MC cable tsis puas vim yog khoov ntau dhau thaum lub sij hawm xas.
4.3 Kev siv MC cables hauv tsev kho kom zoo nkauj
Hauv qee cov ntawv thov hauv chaw nyob, MC Cables tuaj yeem siv rau kev xaim hluav taws xob sab hauv tsev. Txawm li cas los xij, vim muaj qee qhov chaw nyob, cov hluav taws xob yuav tsum tau them nyiaj tshwj xeeb rau kev khoov lub vojvoog thaum txhim kho MC Cables kom ntseeg tau nrog NEC cov kev cai.
