電(dian)(dian)(dian)線(xian)(xian)電(dian)(dian)(dian)纜(lan)的銅(tong)導(dao)(dao)線(xian)(xian)應該(gai)使用(yong)高(gao)純(chun)度(du)電(dian)(dian)(dian)解銅(tong)，這(zhe)樣的材(cai)(cai)料拉(la)出來的絲均(jun)勻且有(you)光澤。有(you)些生產企(qi)業為(wei)獲取(qu)高(gao)額利潤(run)使用(yong)再生銅(tong)，或偷工減料減少銅(tong)線(xian)(xian)面積，導(dao)(dao)致(zhi)電(dian)(dian)(dian)線(xian)(xian)的導(dao)(dao)體(ti)電(dian)(dian)(dian)阻嚴(yan)重超標(biao)，導(dao)(dao)線(xian)(xian)載流量大打折扣，綠寶(bao)電(dian)(dian)(dian)線(xian)(xian)電(dian)(dian)(dian)纜(lan)，使用(yong)時導(dao)(dao)體(ti)過(guo)熱，影(ying)響(xiang)了電(dian)(dian)(dian)線(xian)(xian)的使用(yong)壽命，產生安全隱患。二、絕(jue)(jue)緣(yuan)和(he)護套材(cai)(cai)料的機械性能（抗張強(qiang)度(du)、斷(duan)(duan)裂伸長(chang)率(lv)）指標(biao)不合(he)格(ge)(ge)。部分電(dian)(dian)(dian)線(xian)(xian)電(dian)(dian)(dian)纜(lan)的絕(jue)(jue)緣(yuan)和(he)護套材(cai)(cai)料使用(yong)再生塑料，其抗張強(qiang)度(du)和(he)斷(duan)(duan)裂伸長(chang)率(lv)無法達到(dao)使用(yong)要求(qiu)。這(zhe)種電(dian)(dian)(dian)纜(lan)在受(shou)力過(guo)程中易(yi)(yi)斷(duan)(duan)裂，致(zhi)使帶電(dian)(dian)(dian)導(dao)(dao)體(ti)裸1露，造(zao)成短路和(he)漏放(fang)電(dian)(dian)(dian)。三(san)、高(gao)壓電(dian)(dian)(dian)纜(lan)絕(jue)(jue)緣(yuan)熱延伸項目不合(he)格(ge)(ge)。個別(bie)產品的絕(jue)(jue)緣(yuan)熱延伸出現(xian)(xian)了熔斷(duan)(duan)現(xian)(xian)象，在高(gao)溫(wen)情況下易(yi)(yi)造(zao)成短路事故。

1kV及(ji)以(yi)下的(de)(de)(de)(de)(de)4芯(xin)(xin)(xin)電(dian)(dian)(dian)(dian)(dian)纜（3+1電(dian)(dian)(dian)(dian)(dian)纜），其中的(de)(de)(de)(de)(de)第4芯(xin)(xin)(xin)除作(zuo)為(wei)保(bao)護(hu)接地外，還要輸(shu)送電(dian)(dian)(dian)(dian)(dian)力(li)系統在不(bu)(bu)(bu)平(ping)衡(heng)電(dian)(dian)(dian)(dian)(dian)流及(ji)短路(lu)電(dian)(dian)(dian)(dian)(dian)流。它的(de)(de)(de)(de)(de)大小由不(bu)(bu)(bu)平(ping)衡(heng)電(dian)(dian)(dian)(dian)(dian)流及(ji)短路(lu)電(dian)(dian)(dian)(dian)(dian)流來確(que)定，但一(yi)般不(bu)(bu)(bu)得小于相(xiang)(xiang)(xiang)線(xian)的(de)(de)(de)(de)(de)1/2。1kV及(ji)其以(yi)下三(san)相(xiang)(xiang)(xiang)四線(xian)制低壓配電(dian)(dian)(dian)(dian)(dian)系統，當(dang)保(bao)護(hu)線(xian)和中性線(xian)合(he)用(yong)(yong)同一(yi)導體時，應采用(yong)(yong)4芯(xin)(xin)(xin)電(dian)(dian)(dian)(dian)(dian)纜，而(er)不(bu)(bu)(bu)得采用(yong)(yong)3芯(xin)(xin)(xin)電(dian)(dian)(dian)(dian)(dian)纜加單芯(xin)(xin)(xin)電(dian)(dian)(dian)(dian)(dian)纜組合(he)成一(yi)回路(lu)的(de)(de)(de)(de)(de)方(fang)式(shi)，甚至直接利用(yong)(yong)3芯(xin)(xin)(xin)電(dian)(dian)(dian)(dian)(dian)纜的(de)(de)(de)(de)(de)金(jin)屬護(hu)套或鎧裝層等作(zuo)中性線(xian)的(de)(de)(de)(de)(de)方(fang)式(shi)。否則，當(dang)3相(xiang)(xiang)(xiang)電(dian)(dian)(dian)(dian)(dian)流不(bu)(bu)(bu)平(ping)衡(heng)時，相(xiang)(xiang)(xiang)當(dang)于單芯(xin)(xin)(xin)電(dian)(dian)(dian)(dian)(dian)纜的(de)(de)(de)(de)(de)運行狀態，容易引起工頻干擾(rao)。

環保(bao)(bao)電(dian)(dian)纜(lan)具有哪些特點1、高阻燃(ran)性：環保(bao)(bao)電(dian)(dian)纜(lan)完全保(bao)(bao)證其(qi)(qi)對消防要求(qiu)高的(de)建筑要求(qiu)，火災時(shi)電(dian)(dian)纜(lan)不(bu)燒，并能阻止(zhi)燃(ran)燒后(hou)火焰的(de)蔓延和災害的(de)擴大。2、無鹵(lu)素(su)：采用(yong)綠色環保(bao)(bao)絕緣層、護套及特1制的(de)隔氧層材料，不(bu)僅(jin)具有良好的(de)電(dian)(dian)性能、物理機械性能，并且保(bao)(bao)證了產品不(bu)含鹵(lu)素(su)、解決了其(qi)(qi)燃(ran)燒時(shi)形成的(de)“二次污染”，避免了傳(chuan)統(tong)PVC電(dian)(dian)線燃(ran)燒時(shi)產生可致ai的(de)“2惡英”物質。