生產電線電纜的(de)主要原材(cai)料是(shi)電解(jie)銅(tong)、絕(jue)緣(yuan)材(cai)料和護(hu)套料。目前(qian)原材(cai)料市場(chang)上電解(jie)銅(tong)每噸在(zai)7萬(wan)元以上，而回收的(de)雜銅(tong)則(ze)便宜很多；絕(jue)緣(yuan)材(cai)料和護(hu)套料的(de)產品(pin)(pin)(pin)和殘次(ci)品(pin)(pin)(pin)的(de)差(cha)價更懸(xuan)殊。另外，電線品(pin)(pin)(pin)牌(pai)有哪(na)些，長度不足、絕(jue)緣(yuan)體含膠量(liang)不夠，也是(shi)造成價格差(cha)異的(de)重要原因。每盤線長度，優等(deng)品(pin)(pin)(pin)是(shi)100米，合肥電線，而次(ci)品(pin)(pin)(pin)只(zhi)有90米左右；絕(jue)緣(yuan)體含膠量(liang)優等(deng)品(pin)(pin)(pin)占(zhan)35%～40%，而殘次(ci)品(pin)(pin)(pin)只(zhi)有15%。通過對比，消(xiao)費者不難看(kan)出，成品(pin)(pin)(pin)電線電纜銷售價格存在(zai)差(cha)異是(shi)材(cai)質上存在(zai)貓膩所致。

電(dian)(dian)線(xian)電(dian)(dian)纜(lan)(lan)的(de)(de)(de)銅導(dao)(dao)線(xian)應該使(shi)用高(gao)純度(du)電(dian)(dian)解銅，這樣的(de)(de)(de)材料(liao)拉出來的(de)(de)(de)絲均勻且(qie)有光澤。有些生產企業為(wei)獲取高(gao)額利(li)潤使(shi)用再生銅，或(huo)偷工減料(liao)減少銅線(xian)面(mian)積，導(dao)(dao)致電(dian)(dian)線(xian)的(de)(de)(de)導(dao)(dao)體(ti)(ti)電(dian)(dian)阻嚴重超(chao)標，導(dao)(dao)線(xian)載流量大打折扣，使(shi)用時導(dao)(dao)體(ti)(ti)過熱(re)，影響(xiang)了電(dian)(dian)線(xian)的(de)(de)(de)使(shi)用壽(shou)命(ming)，產生安全隱(yin)患。二(er)、絕緣(yuan)(yuan)和護套材料(liao)的(de)(de)(de)機械性能（抗張強度(du)、斷裂伸長率）指(zhi)標不合(he)格(ge)。部分電(dian)(dian)線(xian)電(dian)(dian)纜(lan)(lan)的(de)(de)(de)絕緣(yuan)(yuan)和護套材料(liao)使(shi)用再生塑料(liao)，其抗張強度(du)和斷裂伸長率無法(fa)達到使(shi)用要求。這種電(dian)(dian)纜(lan)(lan)在(zai)受力過程中易斷裂，致使(shi)帶電(dian)(dian)導(dao)(dao)體(ti)(ti)裸1露，造成短路和漏放電(dian)(dian)。三、高(gao)壓電(dian)(dian)纜(lan)(lan)絕緣(yuan)(yuan)熱(re)延(yan)伸項目不合(he)格(ge)。個別產品的(de)(de)(de)絕緣(yuan)(yuan)熱(re)延(yan)伸出現了熔斷現象，在(zai)高(gao)溫(wen)情(qing)況下易造成短路事故。

電(dian)(dian)(dian)(dian)纜(lan)識(shi)別的(de)(de)小技巧1。電(dian)(dian)(dian)(dian)線(xian)(xian)(xian)(xian)電(dian)(dian)(dian)(dian)纜(lan)絕緣(yuan)層不是采用(yong)絕緣(yuan)塑(su)料(liao)所制，電(dian)(dian)(dian)(dian)線(xian)(xian)(xian)(xian)電(dian)(dian)(dian)(dian)線(xian)(xian)(xian)(xian)電(dian)(dian)(dian)(dian)纜(lan).價錢，而(er)是用(yong)回收塑(su)料(liao)制成(cheng)，輕(qing)輕(qing)一剝(bo)就能將絕緣(yuan)層剝(bo)開(kai)，這(zhe)樣極(ji)易(yi)造(zao)成(cheng)絕緣(yuan)層被電(dian)(dian)(dian)(dian)流(liu)擊而(er)穿漏(lou)電(dian)(dian)(dian)(dian)，對(dui)使用(yong)者的(de)(de)生命(ming)財產安全造(zao)成(cheng)極(ji)大(da)威脅。2。導電(dian)(dian)(dian)(dian)線(xian)(xian)(xian)(xian)電(dian)(dian)(dian)(dian)纜(lan)芯直流(liu)電(dian)(dian)(dian)(dian)阻不合格。電(dian)(dian)(dian)(dian)線(xian)(xian)(xian)(xian)導體的(de)(de)粗細、優(you)劣決定了電(dian)(dian)(dian)(dian)線(xian)(xian)(xian)(xian)電(dian)(dian)(dian)(dian)纜(lan)對(dui)電(dian)(dian)(dian)(dian)流(liu)的(de)(de)負載量(liang)，電(dian)(dian)(dian)(dian)線(xian)(xian)(xian)(xian)的(de)(de)規格型號，如果電(dian)(dian)(dian)(dian)線(xian)(xian)(xian)(xian)電(dian)(dian)(dian)(dian)纜(lan)的(de)(de)線(xian)(xian)(xian)(xian)芯采用(yong)劣質的(de)(de)材料(liao)、實際截面遠遠小于其所標明(ming)的(de)(de)規格，長期使用(yong)因導體電(dian)(dian)(dian)(dian)阻過大(da)會造(zao)成(cheng)發熱(re)，引起電(dian)(dian)(dian)(dian)器火(huo)災(zai)的(de)(de)危險。