購買(mai)電(dian)(dian)(dian)(dian)線(xian)電(dian)(dian)(dian)(dian)纜(lan)時(shi)(shi)怎樣鑒別優(you)劣(lie)呢(ni)？一(yi)要(yao)看(kan)(kan)(kan)：看(kan)(kan)(kan)有(you)無(wu)質量體系認1證(zheng)書；看(kan)(kan)(kan)合格證(zheng)是(shi)(shi)(shi)否(fou)規范(fan)；看(kan)(kan)(kan)有(you)無(wu)廠名、廠址(zhi)、檢(jian)驗章、生產日(ri)期；看(kan)(kan)(kan)電(dian)(dian)(dian)(dian)線(xian)電(dian)(dian)(dian)(dian)纜(lan)上(shang)是(shi)(shi)(shi)否(fou)印有(you)商標、規格、電(dian)(dian)(dian)(dian)壓等。還要(yao)看(kan)(kan)(kan)電(dian)(dian)(dian)(dian)線(xian)電(dian)(dian)(dian)(dian)纜(lan)銅(tong)芯的(de)(de)橫斷(duan)面，優(you)等品(pin)紫(zi)銅(tong)顏色(se)光(guang)亮(liang)、色(se)澤(ze)柔和，否(fou)則便是(shi)(shi)(shi)次品(pin)。二要(yao)試：可取(qu)一(yi)根電(dian)(dian)(dian)(dian)線(xian)電(dian)(dian)(dian)(dian)纜(lan)頭用手(shou)反復(fu)彎曲，凡是(shi)(shi)(shi)手(shou)感(gan)柔軟、抗(kang)1疲勞強度好(hao)、塑料或(huo)橡膠手(shou)感(gan)彈性大(da)且電(dian)(dian)(dian)(dian)線(xian)電(dian)(dian)(dian)(dian)纜(lan)絕緣體上(shang)無(wu)裂痕的(de)(de)就是(shi)(shi)(shi)優(you)等品(pin)。電(dian)(dian)(dian)(dian)線(xian)電(dian)(dian)(dian)(dian)纜(lan)是(shi)(shi)(shi)用戶在用電(dian)(dian)(dian)(dian)過(guo)程中的(de)(de)材(cai)料，其質量的(de)(de)好(hao)壞，綠(lv)寶電(dian)(dian)(dian)(dian)力電(dian)(dian)(dian)(dian)纜(lan)，直接關系到千家萬(wan)戶的(de)(de)用電(dian)(dian)(dian)(dian)安全。因此(ci)，在購買(mai)或(huo)選用時(shi)(shi)，如何快速(su)、準確檢(jian)查電(dian)(dian)(dian)(dian)線(xian)電(dian)(dian)(dian)(dian)纜(lan)質量的(de)(de)好(hao)壞，是(shi)(shi)(shi)廣大(da)電(dian)(dian)(dian)(dian)工必須掌握的(de)(de)技能。

電(dian)(dian)(dian)(dian)(dian)線(xian)(xian)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)的(de)(de)(de)區別(bie)電(dian)(dian)(dian)(dian)(dian)線(xian)(xian)電(dian)(dian)(dian)(dian)(dian)線(xian)(xian)是(shi)由一根(gen)(gen)或(huo)幾根(gen)(gen)柔軟(ruan)的(de)(de)(de)導線(xian)(xian)組(zu)成，外面包以輕軟(ruan)的(de)(de)(de)護(hu)層，用于(yu)(yu)承(cheng)載電(dian)(dian)(dian)(dian)(dian)流的(de)(de)(de)導電(dian)(dian)(dian)(dian)(dian)金屬線(xian)(xian)材。有(you)實心的(de)(de)(de)、絞合的(de)(de)(de)或(huo)箔(bo)片編織的(de)(de)(de)等(deng)各(ge)種形式(shi)。按(an)絕(jue)(jue)緣(yuan)(yuan)狀(zhuang)況分(fen)為(wei)裸電(dian)(dian)(dian)(dian)(dian)線(xian)(xian)和絕(jue)(jue)緣(yuan)(yuan)電(dian)(dian)(dian)(dian)(dian)線(xian)(xian)兩大類。電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)由一根(gen)(gen)或(huo)多根(gen)(gen)相(xiang)互絕(jue)(jue)緣(yuan)(yuan)的(de)(de)(de)導電(dian)(dian)(dian)(dian)(dian)線(xian)(xian)心置于(yu)(yu)密封護(hu)套中構成的(de)(de)(de)絕(jue)(jue)緣(yuan)(yuan)導線(xian)(xian)。其(qi)外可(ke)加(jia)保護(hu)覆蓋(gai)層﹐用于(yu)(yu)傳輸、分(fen)配電(dian)(dian)(dian)(dian)(dian)能(neng)或(huo)傳送電(dian)(dian)(dian)(dian)(dian)信號。它與普通(tong)電(dian)(dian)(dian)(dian)(dian)線(xian)(xian)的(de)(de)(de)差別(bie)主要是(shi)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)尺(chi)寸較大，結構較復雜(za)。電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)主要由導電(dian)(dian)(dian)(dian)(dian)線(xian)(xian)心、絕(jue)(jue)緣(yuan)(yuan)層、密封護(hu)套以及保護(hu)覆蓋(gai)層四個部(bu)分(fen)組(zu)成。按(an)其(qi)用途(tu)可(ke)分(fen)為(wei)電(dian)(dian)(dian)(dian)(dian)力(li)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)﹑通(tong)信電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)和控制(zhi)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)等(deng)。

絞制工藝(yi)分：導(dao)體(ti)絞制、成纜、編織、鋼絲裝鎧和纏(chan)繞。3．包覆根據對電(dian)線電(dian)纜不同(tong)的(de)(de)(de)性能要求，采用的(de)(de)(de)設備在導(dao)體(ti)的(de)(de)(de)外面包覆不同(tong)的(de)(de)(de)材(cai)(cai)料(liao)。包覆工藝(yi)分：A．擠包：橡(xiang)膠、塑(su)料(liao)、鉛、鋁等材(cai)(cai)料(liao)。B．縱包：橡(xiang)皮、鋁帶(dai)材(cai)(cai)料(liao)。C．繞包：帶(dai)狀的(de)(de)(de)紙帶(dai)、云母帶(dai)、無(wu)堿玻璃纖維帶(dai)、無(wu)紡布(bu)、塑(su)料(liao)帶(dai)等，線狀的(de)(de)(de)棉紗(sha)、絲等纖維材(cai)(cai)料(liao)。D．浸涂：絕緣漆、瀝青等。