導(dao)(dao)(dao)體是(shi)指能(neng)(neng)傳導(dao)(dao)(dao)電(dian)流的(de)物體，又稱為導(dao)(dao)(dao)電(dian)線(xian)(xian)(xian)芯。用作電(dian)線(xian)(xian)(xian)電(dian)纜導(dao)(dao)(dao)體的(de)材料(liao)(liao)，首(shou)先要有良好(hao)的(de)導(dao)(dao)(dao)電(dian)性能(neng)(neng)，即電(dian)阻(zu)要小，以減少電(dian)流在線(xian)(xian)(xian)路上的(de)損(sun)耗。損(sun)耗與電(dian)流大(da)小、電(dian)阻(zu)大(da)小有直接關系，并表現(xian)在導(dao)(dao)(dao)體的(de)發熱上。扇形(xing)芯中心(xin)線(xian)(xian)(xian)上導(dao)(dao)(dao)線(xian)(xian)(xian)的(de)直徑一般(ban)較大(da)，處在其(qi)兩側的(de)導(dao)(dao)(dao)線(xian)(xian)(xian)應能(neng)(neng)沿(yan)中心(xin)線(xian)(xian)(xian)上導(dao)(dao)(dao)線(xian)(xian)(xian)滑(hua)動而(er)不改變扇形(xing)芯形(xing)狀，這一規則稱為移滑(hua)規則，否則，當扇形(xing)芯絞(jiao)合(he)成纜時(shi)，扇形(xing)可能(neng)(neng)被破壞而(er)損(sun)傷絕(jue)緣(yuan)。絕(jue)緣(yuan)是(shi)將絕(jue)緣(yuan)材料(liao)(liao)按其(qi)耐(nai)受電(dian)壓(ya)程度的(de)要求，以不同(tong)的(de)厚度包(bao)復在導(dao)(dao)(dao)體外面而(er)成，起著使帶電(dian)體與其(qi)他(ta)部分隔絕(jue)的(de)作用。

為了檢(jian)(jian)驗(yan)(yan)是否漏(lou)焊，生產廠家(jia)又加(jia)了一(yi)(yi)項中間檢(jian)(jian)驗(yan)(yan)裝(zhuang)置，將整盤焊接后的(de)(de)(de)(de)電(dian)(dian)纜(lan)進(jin)行浸水氣密性試驗(yan)(yan)，且(qie)進(jin)行的(de)(de)(de)(de)檢(jian)(jian)驗(yan)(yan)。WDZ與WDZN電(dian)(dian)纜(lan)主要的(de)(de)(de)(de)區別(bie)就是WDZN耐火(huo)電(dian)(dian)纜(lan)導(dao)(dao)體繞包(bao)一(yi)(yi)層云母帶(dai)，使電(dian)(dian)纜(lan)具有燃(ran)(ran)燒情況(kuang)下(xia)保持正常(chang)通電(dian)(dian)一(yi)(yi)段(duan)時(shi)間。WDZ阻(zu)燃(ran)(ran)電(dian)(dian)纜(lan)的(de)(de)(de)(de)主要特點(dian)是電(dian)(dian)纜(lan)不(bu)易(yi)著(zhu)火(huo)或著(zhu)火(huo)時(shi)延燃(ran)(ran)僅(jin)局限(xian)在一(yi)(yi)定范圍內，適用于電(dian)(dian)纜(lan)敷設密集程度較高(gao)的(de)(de)(de)(de)發電(dian)(dian)站、地(di)鐵、隧道、高(gao)層建筑、大(da)型工礦(kuang)(kuang)企業、油田、煤礦(kuang)(kuang)等場所。電(dian)(dian)力電(dian)(dian)纜(lan)主要考查導(dao)(dao)體的(de)(de)(de)(de)材(cai)(cai)質(zhi)和(he)截面積(ji)，若(ruo)導(dao)(dao)體的(de)(de)(de)(de)材(cai)(cai)質(zhi)不(bu)好或截面積(ji)嚴重不(bu)足，就會造成導(dao)(dao)體直(zhi)流電(dian)(dian)阻(zu)嚴重超標，這(zhe)種電(dian)(dian)纜(lan)鋪(pu)設在線(xian)路(lu)中就會增加(jia)電(dian)(dian)流在線(xian)路(lu)上通過時(shi)的(de)(de)(de)(de)損耗。

絕緣(yuan)(yuan)層的(de)材料(liao)必須(xu)具有良好的(de)電(dian)(dian)(dian)(dian)氣(qi)絕緣(yuan)(yuan)性能，主要(yao)表現為(wei)承受(shou)電(dian)(dian)(dian)(dian)壓的(de)大小。一般(ban)地講，同一質(zhi)量的(de)絕緣(yuan)(yuan)層愈厚，耐電(dian)(dian)(dian)(dian)壓也(ye)越(yue)高。電(dian)(dian)(dian)(dian)力(li)電(dian)(dian)(dian)(dian)纜(lan)主要(yao)有導(dao)體直(zhi)流(liu)電(dian)(dian)(dian)(dian)阻(zu)、絕緣(yuan)(yuan)電(dian)(dian)(dian)(dian)阻(zu)、成品(pin)電(dian)(dian)(dian)(dian)壓試驗(yan)及(ji)絕緣(yuan)(yuan)線(xian)芯間電(dian)(dian)(dian)(dian)壓試驗(yan)，每項(xiang)都很重要(yao)，電(dian)(dian)(dian)(dian)力(li)電(dian)(dian)(dian)(dian)纜(lan)電(dian)(dian)(dian)(dian)纜(lan)報價，導(dao)體電(dian)(dian)(dian)(dian)阻(zu)直(zhi)接(jie)(jie)反(fan)映(ying)了電(dian)(dian)(dian)(dian)纜(lan)的(de)電(dian)(dian)(dian)(dian)傳輸性能，直(zhi)接(jie)(jie)影響電(dian)(dian)(dian)(dian)纜(lan)在通電(dian)(dian)(dian)(dian)運行中的(de)溫度(du)、壽(shou)命、電(dian)(dian)(dian)(dian)壓降(jiang)、以及(ji)運行安(an)全。交(jiao)(jiao)聯(lian)絕緣(yuan)(yuan)的(de)品(pin)種雖多，但主要(yao)分為(wei)物(wu)理交(jiao)(jiao)聯(lian)和化(hua)學(xue)交(jiao)(jiao)聯(lian)兩大類(lei)。物(wu)理交(jiao)(jiao)聯(lian)也(ye)稱(cheng)為(wei)輻照(zhao)交(jiao)(jiao)聯(lian)，一般(ban)適用于絕緣(yuan)(yuan)厚度(du)較薄的(de)低壓電(dian)(dian)(dian)(dian)纜(lan)。化(hua)學(xue)交(jiao)(jiao)聯(lian)方法比高能輻射交(jiao)(jiao)聯(lian)工藝簡單，操作(zuo)安(an)全，輻照(zhao)交(jiao)(jiao)聯(lian)聚乙烯的(de)交(jiao)(jiao)聯(lian)度(du)約為(wei)70％，而化(hua)學(xue)交(jiao)(jiao)聯(lian)可達70～90％。