Cov qauv ntawm kev xam cov nqi ntawm cov cables tswj yog raws li nram no: tooj liab hnyav x tooj liab tus nqi=(Wire inch ÷ 2)^2 x 3.14 x Tus naj npawb ntawm cov xov hlau x 8.9 x Tus nqi tooj liab tam sim no + 10% tus nqi ua.
Tus nqi suav rau kev tswj cov cables yog raws li nram no: square xaim x 1.83=tooj liab hnyav x tam sim no tus nqi tooj liab + Armor nqi (qhov hnyav x 0.4 yuan / catties)=Tus nqi
Nqe + 10% tus nqi ua haujlwm. Tus nqi cable=Tus nqi tsim khoom lag luam + Tus nqi ruaj khov + se + Cov nuj nqis lag luam + nyiaj tau los. Tus nqi tsim khoom siv=Tus nqi khoom siv * (1 + Cov khoom siv) (Cov khoom siv yog tus nqi theoretically xam tus nqi).
Cov nqi ruaj khov sib txawv nyob ntawm lub tuam txhab thiab feem ntau suav nrog cov nqi tsim khoom, cov nqi tswj hwm, kev siv hluav taws xob, cov nqi kho mob, kev txo nqi, nqi tsev, thiab cov nqi tsheb thauj mus los.
Feem ntau ua txhaum hauv cov kab tswj kab muaj xws li kev puas tsuaj, kev puas tsuaj ntawm rwb thaiv tsev, rwb thaiv tsev dampness, rwb thaiv tsev laus thiab deterioration, overvoltage, thiab cable overheating. Thaum cov lus hais saum toj no - hais txog qhov tsis raug hauv kab, lub hwj huam mov rau lub faulty cable yuav tsum raug txiav tawm, qhov chaw txhaum yuav tsum tau nyob, qhov txhaum yuav tsum tau tshuaj xyuas thiab tshuaj xyuas, thiab tom qab ntawd kho thiab kuaj yuav tsum tau ua. Txhua lub cables uas yuav tsum tau txiav tawm yuav tsum raug txiav tawm. Fais fab mov tsuas tuaj yeem rov qab tau tom qab tshem tawm qhov txhaum.
