Cov hluav taws kub-resistant cables muab faib ua Class A thiab Class B. Class B cables tuaj yeem tiv taus hluav taws kub ntawm 750 degree txog 800 degree nplaim hluav taws thiab ntsuas qhov hluav taws xob tsawg kawg 90 feeb yam tsis muaj cable rupturing. Class A hluav taws-resistant cables tsim raws li txoj hauv kev xws li kev txhim kho cov txheej txheem ntawm cov txheej txheem refractory thiab ntxiv cov txheej txheem refractory tuaj yeem tiv taus kub ntev li 90 feeb nyob rau hauv qhov hluav taws kub ntawm 950 degree mus rau 1000 degree thiab qhov ntsuas hluav taws xob tsis raug punctured. Qhov hluav taws kub tsis kam ntawm Class A hluav taws-resistant cable yog zoo dua li Class B. Tsis tas li ntawd, ntxhia insulated cable yog cov hluav taws kub-resistant cable nrog kev ua tau zoo ntawm cov tub ntxhais tooj liab, tooj liab sheath thiab magnesium oxide rwb thaiv tsev cov khoom, hu ua MI (mineral. insulated cable) kab. MI cable muaj cov yam ntxwv tiv thaiv hluav taws zoo thiab tuaj yeem ua haujlwm tau ntev ntawm qhov kub ntawm 250 degree. Nws kuj yog tawg-pov thawj, muaj zog corrosion kuj, siab txaus tus nqi thiab hluav taws xob tsis kam. MI cable muaj cov yam ntxwv ntawm tawg-pov thawj, siab corrosion kuj, loj nqa peev xwm, hluav taws xob tsis kam thiab siab mechanical zog. , me me, lub teeb yuag, lub neej ntev, tsis muaj pa luam yeeb. Txawm li cas los xij, tus nqi siab. Cov txheej txheem yog complex thiab kev tsim kho yog nyuaj. Hauv thaj chaw roj av, cov vaj tsev tseem ceeb ntawm cov pej xeem ntoo, qhov chaw kub thiab lwm qhov chaw uas yuav tsum tau muaj hluav taws kub hnyiab thiab nws yog kev lag luam, siv cov hluav taws kub-resistant cables.
