Muaj pes tsawg cov xov hlau nyob hauv 1/2 EMT?
Cov cuab yeej thiab cov lus qhia

Muaj pes tsawg cov xov hlau nyob hauv 1/2 EMT?

19.02.2023 /

Koj puas paub tias muaj ntau cov xov hlau uas nqa tam sim no ntau dhau yuav ua kom muaj cua sov txaus kom yaj cov ntaub yas npog, tsim kom muaj hluav taws kub?

Raws li ESFI, kwv yees li 51,000 qhov hluav taws kub, 1,400 raug mob, thiab $1.3 nphom hauv vaj tse puas tsuaj tshwm sim txhua xyoo hauv Asmeskas vim hluav taws hauv tsev. Cov txheeb cais no ua pov thawj tias koj yuav tsum teeb tsa txoj hlua kom raug los tiv thaiv koj cov khoom. Tias yog vim li cas kuv yuav qhia koj cov xov tooj raug rau 1 EMTs hauv kuv tsab xov xwm.

    Kuv xav kom koj nyeem ntxiv kom paub seb cov xov hlau twg koj tuaj yeem haum rau lwm qhov ntau thiab tsawg ntawm cable ducts:

    Muaj pes tsawg cov xov hlau nyob hauv cov kav dej 1/2?

    Tus naj npawb ntawm cov xov hlau uas tuaj yeem haum rau ½-inch conduit yuav nyob ntawm seb hom hluav taws xob twg koj siv.

    Muaj kev pheej hmoo tias ntau cov cables nyob rau hauv ib lub conduit nqa tam sim no ntau dhau lawm yuav ua kom muaj cua sov txaus los yaj cov yas txheej ntawm cov khoom siv hlau, ua rau muaj kev phom sij tseem ceeb. Kev txheeb xyuas kom zoo ntawm cov khoom siv hauv cov kav dej yog thawj kauj ruam hauv kev txiav txim siab lub peev xwm filling.

    Thaum koj tsis tuaj yeem siv NM cable los tiv thaiv cov xaim hluav taws xob, qhov no yog lub sijhawm koj siv cov kav dej hluav taws xob hloov pauv.

    Cov khoom siv hluav taws xob muaj qhov siab tshaj plaws ntawm cov khoom siv hluav taws xob uas tuaj yeem khiav los ntawm nws, txawm tias nws yog ua los ntawm cov hlau tawv (EMT), tawv yas (PVC conduit), lossis cov hlau hloov tau (FMC). Conduit muaj peev xwm yog ib qho kev ntsuas los ntawm National Electrical Code thiab ua raws li feem ntau cov cai hauv zos uas ua raws li txoj cai siab tshaj plaws hauv txhua qhov chaw.

    Txhawm rau pab koj paub tias muaj pes tsawg cov xov hlau nyob hauv 1 2 EMT, hauv qab no yog ib lub rooj los ntawm National Electrical Code los pab koj taug qab:

    lojHom yeeb nkab14 AWV12 AWV10 AWV8 AWV
     EMT12953
    1/2 ntiPVC-Tshooj 4011853
     PVC-Tshooj 809642
     FMC13963
          
     EMT2216106
    3/4 ntiPVC-Tshooj 40211595
     PVC-Tshooj 80171274
     FMC2216106
     
     EMT3526169
    1-inchPVC-Tshooj 403425159
     PVC-Tshooj 802820137
     FMC3324159

    Qhov twg yog qhov zoo dua, EMT lossis PVC conduit?

    Kuv tuaj yeem pab koj txiav txim siab yog tias koj tab tom sib cav ntawm hluav taws xob hlau tubing thiab PVC tubing thiab EMT conduit. PVC thiab hlau tseem kim dua li txhuas EMTs, uas tseem muaj zog thiab ruaj khov dua.

    Nov yog tsib qhov txiaj ntsig ntawm kev siv EMT txhuas:

    • Txawm hais tias aluminium hnyav 30% tsawg dua hlau, nws tsuas yog muaj zog. Hlau tuaj yeem ua nkig thaum raug kub qis, thaum txhuas ua kom muaj zog.
    • Aluminium tuaj yeem txiav tau yooj yim, khoov lossis stamped yam tsis muaj cov cuab yeej tshwj xeeb.
    • Aluminium shields electromagnetic radiation, tiv thaiv kev cuam tshuam hauv koj cov khoom siv hluav taws xob rhiab heev.
    • Nrog rau cua sov, aluminium yog ib qho zoo heev conductor ntawm hluav taws xob. Nws nyob nyab xeeb rau qhov kov, txawm tias kub lossis txias npaum li cas nws yuav nyob sab nraud.
    • Lwm qhov zoo ntawm aluminium yog nws cov corrosion kuj. Aluminium ib txwm tiv thaiv nws tus kheej los ntawm kev tsim cov txheej nyias oxide thaum raug oxygen. Yog li ntawd, nws tsis corrode zoo li hlau. Txhawm rau tiv thaiv cov hlau los ntawm corrosion, manufacturers kuj anodize nws. (1)

    Ua tib zoo saib qee qhov ntawm peb cov lus hauv qab no.

    • Yuav ua li cas loj hlau rau 30 amps 200 ko taw
    • Yuav txuas hluav taws xob li cas
    • Yuav ua li cas ua cov hlua hluav taws xob hauv qhov chaw tsis tiav

    tswv yim pom zoo

    (1) Aluminium - https://www.livescience.com/28865-aluminium.html

    (2) raug oxygen - https://www.sciencedirect.com/topics/

    engineering / oxygen raug

    Ntxiv ib saib