生(sheng)產電(dian)(dian)線電(dian)(dian)纜的主要原材料(liao)(liao)是電(dian)(dian)解銅(tong)、絕(jue)緣(yuan)材料(liao)(liao)和(he)護套料(liao)(liao)。目前原材料(liao)(liao)市(shi)場上(shang)電(dian)(dian)解銅(tong)每噸在(zai)7萬元(yuan)以上(shang)，而(er)回收的雜銅(tong)則便(bian)宜很(hen)多；絕(jue)緣(yuan)材料(liao)(liao)和(he)護套料(liao)(liao)的產品(pin)(pin)和(he)殘(can)次(ci)品(pin)(pin)的差(cha)價更(geng)懸殊(shu)。另(ling)外，長度不足(zu)、絕(jue)緣(yuan)體(ti)(ti)含膠(jiao)量不夠(gou)，合肥電(dian)(dian)線，也是造成(cheng)價格(ge)差(cha)異(yi)的重要原因。每盤線長度，優等品(pin)(pin)是100米，而(er)次(ci)品(pin)(pin)只有90米左右；絕(jue)緣(yuan)體(ti)(ti)含膠(jiao)量優等品(pin)(pin)占35%～40%，而(er)殘(can)次(ci)品(pin)(pin)只有15%。通過對比，消費者不難看(kan)出，電(dian)(dian)線電(dian)(dian)纜價格(ge)表(biao)，成(cheng)品(pin)(pin)電(dian)(dian)線電(dian)(dian)纜銷售價格(ge)存在(zai)差(cha)異(yi)是材質上(shang)存在(zai)貓膩(ni)所致。

電(dian)(dian)(dian)(dian)纜(lan)(lan)防(fang)(fang)(fang)火(huo)(huo)涂(tu)(tu)(tu)料(liao)(liao)施(shi)工(gong)注(zhu)意事項(xiang)1。電(dian)(dian)(dian)(dian)纜(lan)(lan)防(fang)(fang)(fang)火(huo)(huo)涂(tu)(tu)(tu)料(liao)(liao)施(shi)工(gong)前(qian)應(ying)(ying)將電(dian)(dian)(dian)(dian)纜(lan)(lan)表(biao)面的(de)油污(wu)、雜物(wu)、浮塵等清洗(xi)、打磨干凈，待表(biao)面干燥后再(zai)進行(xing)防(fang)(fang)(fang)火(huo)(huo)涂(tu)(tu)(tu)料(liao)(liao)的(de)施(shi)工(gong)。2。電(dian)(dian)(dian)(dian)纜(lan)(lan)防(fang)(fang)(fang)火(huo)(huo)涂(tu)(tu)(tu)料(liao)(liao)施(shi)工(gong)一般采用噴涂(tu)(tu)(tu)、刷(shua)(shua)涂(tu)(tu)(tu)等方法，使用時(shi)應(ying)(ying)充分攪拌(ban)均勻，附近電(dian)(dian)(dian)(dian)線電(dian)(dian)(dian)(dian)纜(lan)(lan)廠，涂(tu)(tu)(tu)料(liao)(liao)稍稠(chou)時(shi)，可用適量自來水進行(xing)稀釋，以(yi)方便噴涂(tu)(tu)(tu)為宜。3。施(shi)工(gong)過程(cheng)中在(zai)涂(tu)(tu)(tu)層(ceng)(ceng)未干時(shi)之前(qian)，應(ying)(ying)防(fang)(fang)(fang)水、防(fang)(fang)(fang)污(wu)染、防(fang)(fang)(fang)移動、防(fang)(fang)(fang)1暴(bao)曬(shai)、防(fang)(fang)(fang)彎曲(qu)，如有損壞(huai)需(xu)及時(shi)修補。4。對于(yu)塑料(liao)(liao)、橡膠外皮的(de)電(dian)(dian)(dian)(dian)線電(dian)(dian)(dian)(dian)纜(lan)(lan)，一般是直接涂(tu)(tu)(tu)刷(shua)(shua)防(fang)(fang)(fang)火(huo)(huo)涂(tu)(tu)(tu)料(liao)(liao)5次以(yi)上，涂(tu)(tu)(tu)層(ceng)(ceng)厚度(du)為0。4-1。1mm，大(da)約用量1。6kg每平方，對于(yu)包裝有油紙的(de)絕(jue)緣電(dian)(dian)(dian)(dian)纜(lan)(lan)，電(dian)(dian)(dian)(dian)纜(lan)(lan)廠建議應(ying)(ying)先包一層(ceng)(ceng)玻璃(li)絲布，再(zai)進行(xing)防(fang)(fang)(fang)火(huo)(huo)涂(tu)(tu)(tu)料(liao)(liao)的(de)涂(tu)(tu)(tu)刷(shua)(shua)，如果在(zai)室外或者潮濕的(de)環境(jing)下施(shi)工(gong)，應(ying)(ying)加配套(tao)罩(zhao)面清漆。

1kV及(ji)(ji)以下的(de)4芯(xin)(xin)(xin)(xin)電(dian)(dian)(dian)纜(lan)（3+1電(dian)(dian)(dian)纜(lan)），電(dian)(dian)(dian)線(xian)(xian)的(de)規格型號，其(qi)中的(de)第4芯(xin)(xin)(xin)(xin)除作(zuo)為(wei)保(bao)護(hu)接地外，還(huan)要輸(shu)送電(dian)(dian)(dian)力系統在(zai)不(bu)平衡(heng)電(dian)(dian)(dian)流及(ji)(ji)短(duan)路電(dian)(dian)(dian)流。它的(de)大小(xiao)由不(bu)平衡(heng)電(dian)(dian)(dian)流及(ji)(ji)短(duan)路電(dian)(dian)(dian)流來確(que)定，但(dan)一般不(bu)得小(xiao)于相(xiang)線(xian)(xian)的(de)1/2。1kV及(ji)(ji)其(qi)以下三相(xiang)四線(xian)(xian)制低壓(ya)配電(dian)(dian)(dian)系統，當(dang)(dang)保(bao)護(hu)線(xian)(xian)和(he)中性線(xian)(xian)合(he)用同(tong)一導體時，應采(cai)用4芯(xin)(xin)(xin)(xin)電(dian)(dian)(dian)纜(lan)，而不(bu)得采(cai)用3芯(xin)(xin)(xin)(xin)電(dian)(dian)(dian)纜(lan)加(jia)單(dan)芯(xin)(xin)(xin)(xin)電(dian)(dian)(dian)纜(lan)組合(he)成一回路的(de)方(fang)式(shi)，甚至直(zhi)接利用3芯(xin)(xin)(xin)(xin)電(dian)(dian)(dian)纜(lan)的(de)金屬護(hu)套或鎧裝層等作(zuo)中性線(xian)(xian)的(de)方(fang)式(shi)。否則，當(dang)(dang)3相(xiang)電(dian)(dian)(dian)流不(bu)平衡(heng)時，相(xiang)當(dang)(dang)于單(dan)芯(xin)(xin)(xin)(xin)電(dian)(dian)(dian)纜(lan)的(de)運行狀態，容易引起工頻干擾。