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電線是由(you)一根(gen)(gen)或(huo)幾根(gen)(gen)柔(rou)軟(ruan)的導線組成(cheng)，外面包以輕軟(ruan)的護(hu)層；電纜是由(you)一根(gen)(gen)或(huo)幾根(gen)(gen)絕緣包導線組成(cheng)，外面再包以金屬或(huo)橡(xiang)皮制的(de)堅韌外(wai)層。 電纜與電線(xian)一般(ban)都由芯線、絕緣包皮和保(bao)護(hu)外(wai)皮三(san)個(ge)部(bu)分(fen)組成(cheng)。 常用(yong)電(dian)纜的特(te)性如下：CEF——乙丙橡膠絕(jue)緣(yuan)氯丁橡膠護套(tao)，船(chuan)用(yong)阻(zu)燃電(dian)力電(dian)纜。CVV——聚氯乙烯絕(jue)緣(yuan)，聚氯乙烯護套(tao)船(chuan)用(yong)阻(zu)燃電(dian)力電(dian)纜。 氧艙電(dian)線常采用(yong)BV，BX，RV，RVV系列電(dian)線，其中： BV——銅芯聚(ju)氯乙烯絕(jue)緣(yuan)電線，長期允(yun)許溫度(du)65℃，最低溫度(du)-15℃，工作電壓交流500V，直(zhi)流1000V，固定敷(fu)設于室內(nei)、外，可明(ming)敷(fu)也可暗敷(fu)。BX——銅(tong)芯橡皮絕緣線，最高使用溫(wen)度65℃，敷于(yu)室(shi)內(nei)。RV——聚氯(lv)乙烯絕緣(yuan)單芯軟(ruan)線，最高(gao)使(shi)(shi)用(yong)溫度(du)65℃，最低使(shi)(shi)用(yong)溫度(du)-15℃，工作電壓交流(liu)250V，直(zhi)流(liu)500V，用(yong)作儀(yi)器(qi)和設(she)備(bei)的內部接線。RVV——銅(tong)芯聚氯(lv)乙(yi)(yi)(yi)烯(xi)(xi)絕(jue)緣(yuan)(yuan)和(he)護(hu)套(tao)軟(ruan)(ruan)電(dian)(dian)(dian)線(xian)(xian)(xian)(xian)(xian)，允許長(chang)期工(gong)(gong)作(zuo)溫度105℃，工(gong)(gong)作(zuo)電(dian)(dian)(dian)壓交流500V，直流1000V，用于(yu)(yu)潮濕，機械防護(hu)要(yao)求高，經常(chang)移動和(he)彎曲(qu)的(de)(de)場合。 其實，“電(dian)(dian)(dian)線(xian)(xian)(xian)(xian)(xian)”和(he)“電(dian)(dian)(dian)纜”并沒有(you)嚴(yan)格的(de)(de)界限(xian)。通常(chang)將芯數少、產(chan)品直徑小、結構簡單的(de)(de)產(chan)品稱為(wei)(wei)電(dian)(dian)(dian)線(xian)(xian)(xian)(xian)(xian)，沒有(you)絕(jue)緣(yuan)(yuan)的(de)(de)稱為(wei)(wei)裸電(dian)(dian)(dian)線(xian)(xian)(xian)(xian)(xian)，其他的(de)(de)稱為(wei)(wei)電(dian)(dian)(dian)纜；導體(ti)(ti)截面積(ji)較(jiao)(jiao)大(da)的(de)(de)(大(da)于(yu)(yu)6平方(fang)毫米(mi))稱為(wei)(wei)大(da)電(dian)(dian)(dian)線(xian)(xian)(xian)(xian)(xian)，較(jiao)(jiao)小的(de)(de)(小于(yu)(yu)或(huo)(huo)等于(yu)(yu)6平方(fang)毫米(mi))稱為(wei)(wei)小電(dian)(dian)(dian)線(xian)(xian)(xian)(xian)(xian)，絕(jue)緣(yuan)(yuan)電(dian)(dian)(dian)線(xian)(xian)(xian)(xian)(xian)又稱為(wei)(wei)布電(dian)(dian)(dian)線(xian)(xian)(xian)(xian)(xian) 這樣說比較(jiao)(jiao)簡單,容易理解(jie)!! 電(dian)(dian)(dian)纜一(yi)(yi)般有(you)2層以上的(de)(de)絕(jue)緣(yuan)(yuan)，多(duo)數是多(duo)芯結構，繞在電(dian)(dian)(dian)纜盤上，長(chang)度一(yi)(yi)般大(da)于(yu)(yu)100米(mi)。電(dian)(dian)(dian)線(xian)(xian)(xian)(xian)(xian)一(yi)(yi)般是單層絕(jue)緣(yuan)(yuan)，單芯，100米(mi)一(yi)(yi)卷，無線(xian)(xian)(xian)(xian)(xian)盤。 電(dian)(dian)(dian)纜常(chang)見型號(hao)： VV表(biao)示：聚氯(lv)乙(yi)(yi)(yi)烯(xi)(xi)絕(jue)緣(yuan)(yuan)（第(di)一(yi)(yi)個V），聚氯(lv)乙(yi)(yi)(yi)烯(xi)(xi)護(hu)套(tao)（第(di)二個V） YJV22表(biao)示：交連聚氯(lv)乙(yi)(yi)(yi)烯(xi)(xi)絕(jue)緣(yuan)(yuan)（YJ），聚氯(lv)乙(yi)(yi)(yi)烯(xi)(xi)護(hu)套(tao)（V），鋼帶凱(kai)裝（22） 型號(hao)加(jia)(jia)“ZR”或(huo)(huo)“FR”的(de)(de)為(wei)(wei)阻燃(ran)電(dian)(dian)(dian)纜（電(dian)(dian)(dian)線(xian)(xian)(xian)(xian)(xian)）。加(jia)(jia)“L”為(wei)(wei)鋁線(xian)(xian)(xian)(xian)(xian) 電(dian)(dian)(dian)線(xian)(xian)(xian)(xian)(xian)的(de)(de)型號(hao)較(jiao)(jiao)簡單： BVV--聚氯(lv)乙(yi)(yi)(yi)烯(xi)(xi)絕(jue)緣(yuan)(yuan)和(he)護(hu)套(tao)銅(tong)心(xin)線(xian)(xian)(xian)(xian)(xian)， BV--聚氯(lv)乙(yi)(yi)(yi)烯(xi)(xi)絕(jue)緣(yuan)(yuan)銅(tong)心(xin)線(xian)(xian)(xian)(xian)(xian)， BYJ--銅(tong)芯交聯聚烯(xi)(xi)烴絕(jue)緣(yuan)(yuan)電(dian)(dian)(dian)線(xian)(xian)(xian)(xian)(xian)，BVR--聚氯(lv)乙(yi)(yi)(yi)烯(xi)(xi)絕(jue)緣(yuan)(yuan)銅(tong)心(xin)軟(ruan)(ruan)線(xian)(xian)(xian)(xian)(xian)， BX--橡皮絕(jue)緣(yuan)(yuan)銅(tong)心(xin)線(xian)(xian)(xian)(xian)(xian)， RHF--氯(lv)丁橡套(tao)銅(tong)心(xin)軟(ruan)(ruan)線(xian)(xian)(xian)(xian)(xian)。

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