Hauv kev tsim hluav taws xob, xaim hluav taws xob, thiab kev teeb tsa cov khoom siv, peb feem ntau pom cov qauv cable uas muaj cov ntawv xws li YJV, VV, BV, thiab BVR. Ntau tus neeg tsuas paub tias lawv yog cov xaim hluav taws xob thiab cov cables, tab sis tsis paub meej txog lawv cov ntsiab lus tshwj xeeb, qhov sib txawv, thiab cov xwm txheej siv tau. Qhov tseeb, cov qauv lej no tsis yog sib xyaw ua ke; txhua tsab ntawv sib raug mus rau cable tus qauv, khoom siv, lossis lub hom phiaj. Kev nkag siab txog lawv cov ntsiab lus tuaj yeem tiv thaiv kev xaiv yuam kev thiab ua kom muaj kev nyab xeeb hluav taws xob. Niaj hnub no, peb yuav rhuav tshem cov ntsiab lus ntawm cov qauv kab hluav taws xob ntau hauv kev nthuav dav, tso cai rau koj kom yooj yim decipher "code" ntawm cables.
Ua ntej, cia peb qhia meej txog lub hauv paus ntsiab lus: cable qauv naming ua raws li tus qauv ruaj khov, feem ntau yog tsim los ntawm "qib + neeg xyuas pib + rwb thaiv tsev + sheath." Cov ntawv sib txawv sawv cev cov qauv sib txawv. Peb yuav txheeb xyuas plaub tus qauv siv feem ntau ib qho los ntawm ib qho.
Cia peb saib YJV thiab VV ua ntej. Ob qho no suav nrog cov hluav taws xob cables thiab feem ntau siv hauv kev tsim cov kab tseem ceeb thiab cov khoom siv hluav taws xob muaj zog. Qhov sib txawv tseem ceeb nyob hauv cov khoom siv rwb thaiv tsev. Hauv YJV cables, "YJ" sawv cev rau tus ntoo khaub lig- txuas polyethylene (XLPE) rwb thaiv tsev thiab "V" sawv cev rau polyvinyl chloride (PVC) sheath. Lub ntsiab lus tiav yog "cross- txuas polyethylene insulated thiab PVC sheathed fais fab cable." XLPE rwb thaiv tsev muaj qhov zoo tseem ceeb: muaj zog tiv thaiv tshav kub (ntev- lub sijhawm tso cai ua haujlwm kub txog 90 degree), kev laus thiab kev tiv thaiv corrosion, thiab kev ua haujlwm zoo rwb thaiv tsev. Nws tuaj yeem ua haujlwm ruaj khov txawm tias nyob hauv qhov kub thiab txias thiab qhov chaw ntub dej, ua rau nws siv lub zog hluav taws xob ntau tshaj plaws hauv kev tsim kho thiab kev lag luam, tsim nyog rau kev zais zais xws li kev faus av hauv av thiab cov kav dej.
Hauv qhov sib piv, "V" hauv VV cables sawv cev rau ob qho tib si PVC rwb thaiv tsev thiab PVC sheath, lub ntsiab lus "PVC insulated thiab PVC sheathed fais fab cable." Nws cov rwb thaiv tsev thiab sheath yog ob qho tib si ua los ntawm PVC, ua rau tus nqi qis dua, yooj yim dua, thiab yooj yim installation. Txawm li cas los xij, nws muaj kev ua haujlwm tsis zoo, nrog lub sijhawm ntev - tso cai rau kev ua haujlwm kub ntawm tsuas yog 70 degree, thiab nws cov kev laus tsis zoo yog qis dua YJV. Nws feem ntau yog siv rau kev teeb tsa sab hauv tsev, kev siv hluav taws xob ib ntus, lossis cov xwm txheej uas yuav tsum tau ua kom tsis muaj cua sov, thiab tsis haum rau ntev - lub sij hawm faus hauv av los yog siab - qhov kub thiab txias. Yooj yim tso, YJV yog qhov hloov kho dua tshiab ntawm VV, muab kev ua tau zoo dua tab sis kuj yog tus nqi siab dua.
Tom ntej no yog BV thiab BVR cables. Ob hom no muaj nyob rau hauv qeb ntawm lub tsev xov hlau, feem ntau yog siv rau cov ceg txuas hauv tsev teeb pom kev zoo, qhov (socket), thiab lwm yam. Hauv BV, "B" sawv cev rau lub tsev hlau, thiab "V" sawv cev rau PVC rwb thaiv tsev. Tus neeg xyuas pib yog ib qho nyuaj tooj liab hlau, lub ntsiab lus "PVC insulated nyuaj tooj liab core tsev hlau." Nws cov yam ntxwv muaj xws li kev nruj nruj, tsis kam khoov, thiab haum rau ncaj-kab kab, xws li cov kav dej hauv cov phab ntsa lossis hauv qab nthab. Nws kuj yog resistant rau deformation tom qab kho thiab yog pheej yig, ua rau nws yog ib qho ntawm feem ntau siv tsev xov hlau nyob rau hauv lub tsev renovation.
Nyob rau hauv BVR cables, "B" kuj sawv cev rau lub tsev hlau, "V" rau PVC rwb thaiv tsev, thiab "R" rau ib tug mos conductor (sau ntawm ntau nyias tooj liab xov hlau twisted ua ke), lub ntsiab lus "PVC insulated mos tooj liab core tsev hlau." Tsis zoo li tus neeg xyuas pib nruj ntawm BV, cov qauv sib tw ntawm ntau cov xov tooj nyias nyias hauv BVR ua rau nws hloov tau yooj yim, tso cai rau kev khoov yooj yim thiab folding. Nws yog qhov tsim nyog rau cov xwm txheej uas muaj ntau qhov khoov thiab qhov chaw nqaim, xws li cov xaim hauv cov thawv xa khoom lossis cov ntaub thaiv zais tom qab rooj tog. Nws ua tau zoo zam qhov teeb meem tawg ntawm cov neeg ua haujlwm nruj thaum khoov. Txawm li cas los xij, vim yog txoj kev sib tw ntawm tus neeg xyuas pib, tus nqi yog me ntsis siab dua BV. Txhawm rau ua kom pom qhov sib txawv, ntawm no yog cov ntsiab lus yooj yim: YJV thiab VV yog cov hluav taws xob hluav taws xob siv rau lub zog loj. YJV muaj cov cua kub zoo tshaj thiab kev laus ua haujlwm. BV thiab BVR yog lub tsev cables siv rau ceg thaiv. BV muaj cov tub ntxhais nyuaj, haum rau cov kab ncaj, thaum BVR muaj cov tub ntxhais mos, haum rau khoov. Tsis tas li ntawd, tus qauv naj npawb feem ntau yog ua raws li tus lej, xws li YJV-3 × 10+1 × 6, uas sawv cev rau peb 10 square millimeter cov xov hlau tseem ceeb ntxiv rau 6 square millimeter grounding hlau. Tus lej qhia txog qhov chaw hla ntawm tus neeg xyuas pib, txiav txim siab lub peev xwm nqa tam sim no.
Thaum xaiv ib lub cable, xav txog qhov kev siv qhov xwm txheej, qhov kub thiab txias, thiab qhov yuav tsum muaj peev xwm nqa tam sim no: YJV yog qhov nyiam rau kev teeb tsa sab nraum zoov faus thiab siab - qhov kub thiab txias; VV yog qhov tsim nyog rau kev teeb tsa sab hauv tsev thiab hluav taws xob ib ntus; BV yog siv rau txoj hlua ncaj nraim hauv kev kho vaj tse hauv tsev, thaum BVR yog siv rau thaj chaw uas muaj ntau qhov khoov thiab qhov chaw tsawg. Kev nkag siab cov ntsiab lus ntawm tus qauv no tsis tsuas yog tso cai rau kev xaiv cov cable ceev nkaus xwb tab sis kuj tseem pab kom tsis txhob muaj kev nyab xeeb xws li kub dhau, kev laus, thiab luv luv Circuit Court los ntawm kev xaiv cov cable tsis raug.
Qhov tseeb, cov qauv ntawm cov qauv tsim qauv tsis yog qhov nyuaj. Tsuas yog nco ntsoov tias "cov ntawv sib raug rau cov qauv, thiab cov lej sib haum rau cov lus qhia tshwj xeeb," thiab koj tuaj yeem nkag siab yooj yim ntau yam cables. Dhau li ntawm plaub yam uas tau hais los saum no, kuj tseem muaj cov qauv zoo li YJV22 (steel-tape armored) thiab RVV (mos- sheathed cable), uas nws lub ntsiab lus tseem tuaj yeem tawg raws li tus qauv ntawm "qib + neeg xyuas pib + rwb thaiv tsev + sheath." Vam tias, tsab xov xwm no yuav pab koj tshem tawm qhov tsis meej pem txog kev tsim qauv cable, ua rau koj xaiv hluav taws xob ntau tshaj lij thiab muaj kev nyab xeeb dua.