購買電(dian)(dian)(dian)(dian)線(xian)(xian)電(dian)(dian)(dian)(dian)纜時(shi)怎(zen)樣(yang)鑒別(bie)優劣(lie)呢？一要看(kan)(kan)：看(kan)(kan)有無(wu)質量體(ti)系(xi)認1證書；看(kan)(kan)合格證是(shi)否規范；看(kan)(kan)有無(wu)廠名(ming)、廠址(zhi)、檢(jian)(jian)驗章、生產日期；看(kan)(kan)電(dian)(dian)(dian)(dian)線(xian)(xian)電(dian)(dian)(dian)(dian)纜上(shang)是(shi)否印有商標、規格、電(dian)(dian)(dian)(dian)壓等。還要看(kan)(kan)電(dian)(dian)(dian)(dian)線(xian)(xian)電(dian)(dian)(dian)(dian)纜銅(tong)芯的(de)(de)橫斷面，電(dian)(dian)(dian)(dian)線(xian)(xian)的(de)(de)規格型號，優等品(pin)(pin)(pin)紫銅(tong)顏(yan)色光亮、色澤柔(rou)和，否則(ze)便(bian)是(shi)次品(pin)(pin)(pin)。二要試：可取一根電(dian)(dian)(dian)(dian)線(xian)(xian)電(dian)(dian)(dian)(dian)纜頭用手反(fan)復彎曲，凡是(shi)手感柔(rou)軟、抗1疲勞強(qiang)度好、塑料或(huo)橡(xiang)膠手感彈性大(da)且電(dian)(dian)(dian)(dian)線(xian)(xian)電(dian)(dian)(dian)(dian)纜絕(jue)緣體(ti)上(shang)無(wu)裂痕的(de)(de)就是(shi)優等品(pin)(pin)(pin)。電(dian)(dian)(dian)(dian)線(xian)(xian)電(dian)(dian)(dian)(dian)纜是(shi)用戶在(zai)用電(dian)(dian)(dian)(dian)過程(cheng)中的(de)(de)材料，其(qi)質量的(de)(de)好壞，直(zhi)接(jie)關系(xi)到千家(jia)萬戶的(de)(de)用電(dian)(dian)(dian)(dian)安全。因此，在(zai)購買或(huo)選用時(shi)，如何快速、準確檢(jian)(jian)查電(dian)(dian)(dian)(dian)線(xian)(xian)電(dian)(dian)(dian)(dian)纜質量的(de)(de)好壞，是(shi)廣大(da)電(dian)(dian)(dian)(dian)工必須掌握的(de)(de)技能。

的銅芯(xin)線銅芯(xin)為紫黑色、偏黃或(huo)偏白(bai)，雜質(zhi)(zhi)多(duo)，機械強度差(cha)，韌性(xing)不佳，稍用(yong)(yong)力即(ji)會折(zhe)斷，而且電(dian)(dian)(dian)線電(dian)(dian)(dian)纜內常有(you)斷線現(xian)象。檢查時，你只要把電(dian)(dian)(dian)線電(dian)(dian)(dian)纜一頭剝開2cm，然(ran)后(hou)用(yong)(yong)一張白(bai)紙在銅芯(xin)上稍微搓一下(xia)，如果白(bai)紙上有(you)黑色物(wu)質(zhi)(zhi)，說明銅芯(xin)里(li)雜質(zhi)(zhi)比較多(duo)。另(ling)外，電(dian)(dian)(dian)線電(dian)(dian)(dian)纜絕緣(yuan)層看上去(qu)似乎很厚(hou)實(shi)(shi)，電(dian)(dian)(dian)線，實(shi)(shi)際(ji)上大(da)多(duo)是用(yong)(yong)再(zai)生塑料制成(cheng)的，該料生產的產品韌性(xing)差(cha)、抗損性(xing)差(cha)、容易(yi)剝離龜裂，時間一長，絕緣(yuan)層會老化而漏電(dian)(dian)(dian)，造成(cheng)安全(quan)事故發生。

電(dian)(dian)(dian)纜(lan)(lan)如何防(fang)(fang)水(shui)(shui)？1、電(dian)(dian)(dian)纜(lan)(lan)接頭應密(mi)封(feng)，切斷(duan)電(dian)(dian)(dian)纜(lan)(lan)的(de)(de)(de)結束，堆放或鋪設(she)應當與塑料密(mi)封(feng)，防(fang)(fang)止水(shui)(shui)分滲(shen)透。2、電(dian)(dian)(dian)線和(he)電(dian)(dian)(dian)纜(lan)(lan)敷設(she)后(hou)(hou)應及時在生產(chan)。3、購買電(dian)(dian)(dian)纜(lan)(lan)：必須選擇質量制造商(shang)、電(dian)(dian)(dian)纜(lan)(lan)專賣店：因為(wei)雜質的(de)(de)(de)絕緣(yuan)、氣孔發生水(shui)(shui)樹(shu)的(de)(de)(de)起點，和(he)電(dian)(dian)(dian)纜(lan)(lan)質量是非(fei)常重要的(de)(de)(de)防(fang)(fang)止水(shui)(shui)樹(shu)老化。4、加強電(dian)(dian)(dian)纜(lan)(lan)頭生產(chan)過程(cheng)管(guan)理：一旦(dan)電(dian)(dian)(dian)纜(lan)(lan)進水(shui)(shui)里(li)，是早出現(xian)擊穿現(xian)象往(wang)往(wang)是有(you)(you)線頭，因此鋼絲生產(chan)井(jing)，可以延長電(dian)(dian)(dian)纜(lan)(lan)的(de)(de)(de)一生。5、寒冷的(de)(de)(de)電(dian)(dian)(dian)纜(lan)(lan)頭：3m的(de)(de)(de)冷收縮硅橡膠電(dian)(dian)(dian)纜(lan)(lan)配件，電(dian)(dian)(dian)線品牌有(you)(you)哪些，生產(chan)簡(jian)單方便，什么牌子的(de)(de)(de)電(dian)(dian)(dian)線好，不用燈，不需要焊接。6、完成后(hou)(hou)的(de)(de)(de)電(dian)(dian)(dian)纜(lan)(lan)測(ce)試電(dian)(dian)(dian)纜(lan)(lan)頭生產(chan)：投產(chan)前高壓直流泄漏試驗(yan)，試驗(yan)后(hou)(hou)測(ce)試變電(dian)(dian)(dian)站(zhan)電(dian)(dian)(dian)線電(dian)(dian)(dian)纜(lan)(lan)，其他電(dian)(dian)(dian)纜(lan)(lan)不測(ce)試。