Ho na le lithapo tse kae ho 1/2 EMT?
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Ho na le lithapo tse kae ho 1/2 EMT?

19.02.2023 /

Na u ne u tseba hore lithapo tse ngata tse jereng metsi a mangata haholo li tla hlahisa mocheso o lekaneng ho qhibilihisa sekoaelo sa vinyl, ho baka kotsi ea mollo?

Ho ea ka ESFI, hoo e ka bang mello ea 51,000, likotsi tsa 1,400, le $ 1.3 bilione ea tšenyo ea thepa e etsahala selemo le selemo US ka lebaka la mollo oa mahae. Lipalopalo tsena li paka hore u tlameha ho kenya likhoele tse nepahetseng ho sireletsa thepa ea hau. Ke ka lebaka leo ke tla u ruta palo e nepahetseng ea lithapo bakeng sa 1 EMTs sehloohong sa ka.

    Ke u khothaletsa ho tsoela pele ho bala ho fumana palo ea lithapo tseo u ka li kenyang ka boholo bo bong ba li-cable ducts:

    Ke lithapo tse kae tse ka har'a conduit 1/2?

    Palo ea lithapo tse tiileng tse ka kenang kotopong ea ½-inch e tla lula e ipapisitse le hore na u sebelisa mofuta ofe oa kotopo ea motlakase.

    Ho na le kotsi ea hore lithapo tse ngata ka har'a kotopo e jereng metsi a mangata haholo li tla hlahisa mocheso o lekaneng ho qhibilihisa lesela la vinyl holim'a lithapo tse tiileng, ho baka kotsi e kholo ea mollo. Khethollo e nepahetseng ea lisebelisoa tsa conduit ke mohato oa pele oa ho khetholla matla a ho tlatsa.

    Ha o sa khone ho sebelisa thapo ea NM ho sireletsa lithapo tsa motlakase tse pepesehileng, ena ke nako eo u sebelisang kotopo ea motlakase e le sebaka se seng.

    Tsela ea motlakase e na le palo e kholo ea lithapo tsa motlakase tse ka tsamaisoang ka har'a eona, ebang ke ea tšepe e thata (EMT), polasetiki e thata (PVC conduit), kapa flexible metal (FMC). Conduit capacity ke tekanyo e behiloeng ke Khoutu ea Naha ea Motlakase 'me e lumellana le mekhoa e mengata ea sebaka seo e sebetsang e le khoutu e phahameng ka ho fetisisa ea molao sebakeng leha e le sefe.

    Ho o thusa ho tseba hore na ho na le lithapo tse kae ho 1 2 EMT, ka tlase ke tafole e tsoang ho Khoutu ea Naha ea Motlakase ho u thusa ho tsamaea:

    boholoMofuta oa lipeipi14AWG12AWG10AWG8AWG
     EMT12953
    1/2 inchPVC-Sch4011853
     PVC-Sch809642
     FMC13963
          
     EMT2216106
    3/4 inchPVC-Sch40211595
     PVC-Sch80171274
     FMC2216106
     
     EMT3526169
    Lisenthimithara tse 1PVC-Sch403425159
     PVC-Sch802820137
     FMC3324159

    Ho molemo ke hofe, EMT kapa PVC conduit?

    Nka u thusa ho etsa qeto e nang le tsebo haeba u phehisana khang pakeng tsa li-tubing tsa tšepe tsa motlakase le li-tubing tsa PVC le conduit ea EMT. PVC le tšepe li theko e boima haholo ho feta li-EMTs tsa aluminium, tseo le tsona li matla haholo ebile li tšoarella ho feta.

    Mona ke melemo e mehlano ea ho sebelisa aluminium ea EMT:

    • Le hoja aluminium e le boima ba 30% ka tlase ho tšepe, e matla joalo. Litšepe li ka senyeha ha li le tlas'a mocheso o tlase, ha aluminium e ntse e matlafala.
    • Aluminium e ka khaoloa habonolo, ea kobeha kapa ea hatisoa ntle le lisebelisoa tse khethehileng.
    • Aluminium e sireletsa mahlaseli a motlakase, e thibela ho kena-kenana le lisebelisoa tsa hau tsa motlakase.
    • Hammoho le mocheso, aluminium ke conductor e babatsehang ea motlakase. E lula e sireletsehile ha e e ama, ho sa tsotellehe hore na ho chesa kapa ho bata hakae ka ntle.
    • Boleng bo bong ba aluminium ke ho hanyetsa ho bola ha eona. Aluminium e itšireletsa ka tlhaho ka ho etsa lesela le lesesaane la oxide ha le pepesehetse oksijene. Ka lebaka leo, ha e senyehe joaloka tšepe. Ho sireletsa tšepe ka ho eketsehileng ho senya, bahlahisi ba boetse ba e tlotsa. (1)

    Sheba tse ling tsa lingoliloeng tsa rona tse ka tlase.

    • Ke terata ea boholo bofe bakeng sa 30 amps 200 feet
    • Mokhoa oa ho pola lithapo tsa motlakase
    • Mokhoa oa ho tsamaisa likhoele tsa motlakase kamoreng e ka tlase e sa phethoang

    likhothaletso

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

    (2) ho pepesehela oksijene - https://www.sciencedirect.com/topics/

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