阻(zu)燃(ran)(ran)(ran)(ran)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)完全由無機物(wu)構(gou)成(cheng)耐火(huo)層(ceng)(ceng)，而(er)普通耐火(huo)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)的(de)(de)耐火(huo)層(ceng)(ceng)是(shi)由無機物(wu)與一(yi)(yi)般(ban)有機物(wu)復合而(er)成(cheng)，因(yin)此MI電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)的(de)(de)耐火(huo)性能(neng)較普通耐火(huo)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)更優且不(bu)會(hui)因(yin)燃(ran)(ran)(ran)(ran)燒而(er)分解產生腐蝕性氣(qi)體。其(qi)主要原理(li)(li)是(shi)在材料中添加了金(jin)屬水合物(wu)成(cheng)份，也(ye)可分別(bie)(bie)實現低(di)鹵(lu)低(di)煙、無鹵(lu)低(di)煙和電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)的(de)(de)阻(zu)燃(ran)(ran)(ran)(ran)化(hua)。但(dan)是(shi)，所謂'隔(ge)(ge)氧層(ceng)(ceng)'和'隔(ge)(ge)火(huo)層(ceng)(ceng)'只是(shi)實現電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)阻(zu)燃(ran)(ran)(ran)(ran)的(de)(de)一(yi)(yi)種(zhong)(zhong)手段，歸(gui)根(gen)到底它還是(shi)一(yi)(yi)種(zhong)(zhong)阻(zu)燃(ran)(ran)(ran)(ran)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)，其(qi)所能(neng)達到的(de)(de)高阻(zu)燃(ran)(ran)(ran)(ran)級別(bie)(bie)也(ye)是(shi)A類。因(yin)此，不(bu)能(neng)把(ba)阻(zu)燃(ran)(ran)(ran)(ran)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)叫做'隔(ge)(ge)氧層(ceng)(ceng)'電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)，而(er)只能(neng)說'隔(ge)(ge)氧層(ceng)(ceng)'電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)是(shi)一(yi)(yi)種(zhong)(zhong)阻(zu)燃(ran)(ran)(ran)(ran)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)。絕(jue)緣(yuan)電(dian)(dian)(dian)(dian)(dian)線(xian)是(shi)維持一(yi)(yi)般(ban)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)線(xian)的(de)(de)電(dian)(dian)(dian)(dian)(dian)氣(qi)性能(neng)和物(wu)理(li)(li)化(hua)學特(te)性的(de)(de)另外(wai)，具備自(zi)熄型(xing)，即不(bu)容易(yi)點(dian)燃(ran)(ran)(ran)(ran)，或當電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)線(xian)因(yin)事本身起(qi)火(huo)或者外(wai)明火(huo)點(dian)燃(ran)(ran)(ran)(ran)起(qi)火(huo)時，在起(qi)火(huo)滅掉后電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)線(xian)已不(bu)再次點(dian)燃(ran)(ran)(ran)(ran)，或點(dian)燃(ran)(ran)(ran)(ran)時間很(hen)(hen)短(duan)(一(yi)(yi)個小時之內)，或延燃(ran)(ran)(ran)(ran)長短(duan)很(hen)(hen)短(duan)。

阻(zu)燃電(dian)纜在(zai)(zai)(zai)火(huo)災(zai)(zai)事故產(chan)生(sheng)(sheng)時要保(bao)(bao)持一(yi)(yi)(yi)段時間的(de)一(yi)(yi)(yi)切正常供電(dian)系統，而絕緣(yuan)電(dian)線不(bu)(bu)具有這一(yi)(yi)(yi)特點。這一(yi)(yi)(yi)特點決策了阻(zu)燃電(dian)纜在(zai)(zai)(zai)現在(zai)(zai)(zai)大(da)都(dou)市及公(gong)共建筑(zhu)(zhu)中(zhong)(zhong)起著關鍵的(de)功效。阻(zu)燃電(dian)纜適(shi)用但凡在(zai)(zai)(zai)火(huo)災(zai)(zai)事故時，電(dian)纜廠(chang)家，仍(reng)需維持一(yi)(yi)(yi)切正常運作(zuo)的(de)路線，如工(gong)業生(sheng)(sheng)產(chan)及工(gong)業建筑(zhu)(zhu)的(de)消防設施、應急照明(ming)燈控(kong)制回路等(deng)。?阻(zu)燃電(dian)纜在(zai)(zai)(zai)發生(sheng)(sheng)火(huo)災(zai)(zai)時能不(bu)(bu)斷工(gong)作(zuo)中(zhong)(zhong)(傳輸(shu)電(dian)流量和數(shu)據信(xin)號)，其自身延(yan)燃是否沒有考評之列。絕緣(yuan)電(dian)線在(zai)(zai)(zai)火(huo)災(zai)(zai)事故產(chan)生(sheng)(sheng)時迅速中(zhong)(zhong)斷工(gong)作(zuo)中(zhong)(zhong)，其作(zuo)用取決于阻(zu)燃和不(bu)(bu)蔓延(yan)到能自熄;而阻(zu)燃電(dian)纜能在(zai)(zai)(zai)750～800℃的(de)火(huo)苗點燃中(zhong)(zhong)保(bao)(bao)持180分鐘一(yi)(yi)(yi)切正常運作(zuo)。

阻(zu)燃電(dian)(dian)纜完全(quan)由無機物(wu)構(gou)成(cheng)耐(nai)(nai)火(huo)(huo)層，而(er)(er)普通耐(nai)(nai)火(huo)(huo)電(dian)(dian)纜的(de)耐(nai)(nai)火(huo)(huo)層是由無機物(wu)與一(yi)般有機物(wu)復合而(er)(er)成(cheng)，因(yin)此(ci)(ci)MI電(dian)(dian)纜的(de)耐(nai)(nai)火(huo)(huo)性能較普通耐(nai)(nai)火(huo)(huo)電(dian)(dian)纜更優(you)且不(bu)會因(yin)燃燒而(er)(er)分解產生(sheng)腐蝕性氣(qi)體。傳導(dao)阻(zu)滯、減(jian)緩火(huo)(huo)苗順著電(dian)(dian)纜線擴(kuo)散(san)，使火(huo)(huo)災事故(gu)不(bu)至于(yu)(yu)擴(kuo)張(zhang)。因(yin)為(wei)其成(cheng)本費較低(di)，因(yin)而(er)(er)是礦物(wu)絕緣電(dian)(dian)纜中很多選用的(de)電(dian)(dian)纜線種類。該電(dian)(dian)纜線在火(huo)(huo)災事故(gu)狀(zhuang)況(kuang)下(xia)有可(ke)能被燒毀而(er)(er)不(bu)可(ke)以運作，但可(ke)阻(zu)攔(lan)火(huo)(huo)情的(de)擴(kuo)散(san)，防止導(dao)致更大的(de)損害。由于(yu)(yu)無鹵阻(zu)燃電(dian)(dian)纜的(de)價格較貴，因(yin)此(ci)(ci)在提高(gao)電(dian)(dian)纜阻(zu)燃性和降低(di)鹵酸氣(qi)體發生(sheng)量(liang)之間采取(qu)折衷的(de)方式(shi)開發出了低(di)鹵低(di)煙(yan)阻(zu)燃電(dian)(dian)纜。它(ta)的(de)含鹵量(liang)約(yue)為(wei)含鹵阻(zu)燃電(dian)(dian)纜的(de)1／3左右。發煙(yan)量(liang)也接(jie)近于(yu)(yu)公認的(de)'低(di)煙(yan)'水平。