Hlau thhn, ib yam li lwm yam khoom siv hauv tsev xws li cov kav dej, nws tsis tas yuav hloov ntau zaus thaum siv ib txwm siv. Feem ntau, nws tsuas yog txiav txim siab thaum lub sijhawm hloov kho thib ob seb puas yuav hloov thhn thwn hlau, thiab muaj ntau tus neeg siv uas tsis hloov THHN THWN 2 xaim thaum lub sijhawm kho dua tshiab.
Raws li Asmeskas tus qauv, lub neej kev pab cuam ntawm cable thhn yuav tsum tsis pub tsawg tshaj 70 xyoo. Hauv lwm lo lus, ntev npaum li kev tsim kho tau ua raws li cov lus qhia tshwj xeeb, kev pabcuam lub neej ntawm thhn thwn hlau tuaj yeem yuav luag zoo ib yam li cov khoom kho kom zoo nkauj. Tau kawg, cov saum toj no hais txog thhn tooj liab hlau, thiab kev pab cuam lub neej ntawm thhn txhuas hlau yog luv me ntsis. Tab sis qhov no tsis tau txhais hais tias thhn hlau yeej tsis tuaj yeem hloov tau. Thaum peb qhov xwm txheej hauv qab no tshwm sim, nws yuav tsum xav txog kev hloov cov thhn stranded hlau.
Qhov zoo ntawm thhn Hlau tau deteriorated. Tsis yog tag nrho thhn hluav taws xob xaim ntawm lub khw yog cov khoom tsim nyog. Thaum peb yuav ib lub thhn cable uas tsis zoo, cov teeb meem nws coj peb yog qhov kawg: yog tias lub rwb thaiv tsev txheej me ntsis puas, nws yog to; Kev tawg me ntsis ntawm thhn conductor tuaj yeem ua rau overload; Ib me ntsis adhesion ntawm lub connector yuav ua rau ib tug luv luv Circuit Court... Qee zaus, ib los yog ob Circuit Court faults tshwm sim, uas yuav xam tau tias yog ib tug coincidence. Tab sis yog tias txoj kab nquag ua haujlwm tsis zoo (1-2 zaug hauv ib xyoos), peb yuav tsum xav tias qhov zoo ntawm THHN hlau. Nyob rau lub sijhawm no, nws yog ib qho tsim nyog los hloov lub cable thhn thwn thoob plaws hauv lub tsev, uas yuav ua rau cov kab tsis raug thiab tsis yooj yim rau cov neeg siv. Qhov no tsuas yog ib qho nam xwb. Ntawm qhov tod tes, yog tias muaj teeb meem nrog cov cuab yeej tiv thaiv, nws kuj yuav ua rau hluav taws xob poob rau cov neeg ua haujlwm, cov khoom siv hluav taws xob, lossis ua rau hluav taws.
Kev xaiv tsis tuaj yeem ua tau raws li qhov xav tau. Nrog rau kev nce hauv cov khoom siv hauv tsev, kev xaiv ntawm cov xov hlau kuj hloov pauv. Saib rov qab ntau tshaj li kaum xyoo dhau los, kev sib xyaw ua ke ntawm 16 AWG thhn hlau khoom thiab 14 hli thhn hlau yog feem ntau siv hauv tsev kho kom zoo nkauj. Txawm li cas los xij, niaj hnub no kev kho kom zoo nkauj hauv tsev, muaj tsawg heev 16 AWG thhn xov hlau, thiab hloov ntau ntawm cable 12 AWG thhn thiab txawm cable thhn 10 AWG xov hlau siv. Tsis muaj leej twg tuaj yeem hais meej tias yav tom ntej yuav muaj dab tsi. Leej twg paub seb qhov tam sim no ntawm cov kab hluav taws xob yuav nce ntxiv (raws li txoj kev txhim kho tam sim no, qhov tam sim no tsuas yog nce), txo qis (vim kev tshawb fawb vwm thiab kev txhim kho ntawm cov khoom siv hauv ib puag ncig, uas yuav ua rau txo qis tam sim no ntawm cov kab hluav taws xob yav tom ntej), lossis txawm tias tshem tawm qhov xav tau ntawm cov xov hlau.
Qhov feem ntau peb tuaj yeem ua tau tam sim no yog xaiv qhov kev teeb tsa zoo tshaj plaws uas peb tuaj yeem pom niaj hnub no - seb qhov kev teeb tsa no tuaj yeem ua tau raws li qhov xav tau ntawm ob peb lub xyoo tom ntej no tsis paub tseeb. Yog li, yog tias muaj ib hnub yav tom ntej, niaj hnub no thhn hlau xaiv tsis txaus, peb yuav tau hloov thhn cable. Qhov ntau tsis tuaj yeem ua tau raws li qhov xav tau. Ntawm ib sab, nws yog tus naj npawb ntawm cov khoom siv hluav taws xob (switches, sockets), thiab ntawm qhov tod tes, nws yog tus naj npawb ntawm circuits (txhua qhov hloov pauv hauv lub thawv xa khoom yog ib lub voj voog). Thaum qhov ntau tsis tuaj yeem ua tau raws li qhov xav tau, nws yog qhov yuav tsum tau nce lossis hloov cov thhn hlau.
