低壓電纜結構

由線(xian)(xian)(xian)(xian)芯(xin)(xin)(xin)、絕緣層和保護層三(san)部(bu)分構成。線(xian)(xian)(xian)(xian)芯(xin)(xin)(xin)用于傳導電(dian)(dian)流， 一(yi)般由多股銅線(xian)(xian)(xian)(xian)或(huo)多股鋁(lv)線(xian)(xian)(xian)(xian)絞合而成。低(di)壓電(dian)(dian)纜(lan)有單芯(xin)(xin)(xin)、雙芯(xin)(xin)(xin)、三(san)芯(xin)(xin)(xin)、四(si)芯(xin)(xin)(xin)等幾種。雙芯(xin)(xin)(xin)電(dian)(dian)纜(lan)用于單相(xiang)線(xian)(xian)(xian)(xian)路(lu)(lu)，三(san)芯(xin)(xin)(xin)和四(si)芯(xin)(xin)(xin)電(dian)(dian)纜(lan)分別用于三(san)相(xiang)三(san)線(xian)(xian)(xian)(xian)制(zhi)線(xian)(xian)(xian)(xian)路(lu)(lu)和三(san)相(xiang)四(si)線(xian)(xian)(xian)(xian)制(zhi)線(xian)(xian)(xian)(xian)路(lu)(lu)， 單芯(xin)(xin)(xin)電(dian)(dian)纜(lan)可以按需要應(ying)用于單相(xiang)制(zhi)線(xian)(xian)(xian)(xian)路(lu)(lu)或(huo)三(san)相(xiang)制(zhi)線(xian)(xian)(xian)(xian)路(lu)(lu)。常用的低(di)壓電(dian)(dian)纜(lan)線(xian)(xian)(xian)(xian)芯(xin)(xin)(xin)截面積有10，16， 25， 35， 50， 70， 95， 120，150， 185， 240 mm等。

保護層

（3）橡皮(pi)電纜的保護(hu)(hu)層(ceng)。橡皮(pi)電纜的保護(hu)(hu)層(ceng)分內護(hu)(hu)層(ceng)和外護(hu)(hu)層(ceng)。內護(hu)(hu)層(ceng)有聚氯乙(yi)烯護(hu)(hu)套、氯丁橡皮(pi)護(hu)(hu)套（非燃性橡皮(pi)）和鉛包三(san)種；外護(hu)(hu)層(ceng)分為鋼帶(dai)鎧(kai)裝(zhuang)、橡皮(pi)護(hu)(hu)套和塑(su)料(liao)護(hu)(hu)套三(san)種。

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