線電(dian)纜中有(you)(you)(you)單芯和(he)多(duo)芯之分(fen)，會(hui)有(you)(you)(you)不了解的用戶有(you)(you)(you)疑問，3+2芯和(he)4+1芯，看著都是(shi)5芯，那這兩者(zhe)到底有(you)(you)(you)沒有(you)(you)(you)區(qu)別呢？下面介紹下電(dian)線電(dian)纜3+2和(he)4+1芯的含(han)義及(ji)區(qu)別。

一、電(dian)線(xian)和電(dian)纜的區(qu)別

電(dian)線是(shi)由一根或(huo)幾(ji)根柔軟(ruan)的導線組成(cheng)，外面包(bao)以輕軟(ruan)的護層(ceng)；

電纜是由(you)一(yi)根或(huo)幾根絕緣包(bao)導線組成(cheng)，外(wai)面再包(bao)以金屬或(huo)橡皮制的堅韌外(wai)層(ceng)。

二、電(dian)線(xian)(xian)上(shang)的(de)3+2和(he)4+1表示一根電(dian)纜(lan)線(xian)(xian)的(de)芯(xin)(xin)(xin)數，一根電(dian)纜(lan)里面有相互絕緣的(de)2條(tiao)(tiao)(tiao)或(huo)3條(tiao)(tiao)(tiao)、3+2條(tiao)(tiao)(tiao)、4+1條(tiao)(tiao)(tiao)線(xian)(xian)、5條(tiao)(tiao)(tiao)線(xian)(xian)，分(fen)別叫2芯(xin)(xin)(xin)或(huo)3芯(xin)(xin)(xin)、3+2芯(xin)(xin)(xin)、4+1芯(xin)(xin)(xin)、5等芯(xin)(xin)(xin)線(xian)(xian)。

三、下(xia)面以電力電纜YJV為(wei)例

YJV 3+2芯

3+2電纜(lan)的(de)3就是(shi)三根相線(xian)(xian)（L1，L2，L3相線(xian)(xian)，這(zhe)三條線(xian)(xian)直(zhi)徑(jing)較(jiao)大(da)）線(xian)(xian)的(de)直(zhi)徑(jing)一樣大(da)，2就是(shi)零線(xian)(xian)和和PE線(xian)(xian)，一條線(xian)(xian)用(yong)于接零線(xian)(xian)（N中性線(xian)(xian)，這(zhe)條直(zhi)徑(jing)相對(dui)L1，L2，L3小）、一條線(xian)(xian)用(yong)于接接地線(xian)(xian)（PE接地保護線(xian)(xian)，這(zhe)條直(zhi)徑(jing)相對(dui)L1，L2，L3也(ye)小）。

四、YJV 4+1芯(xin)

4+1電(dian)纜(lan)(lan)的4就(jiu)是(shi)三根相線(xian)(xian)(xian)和零線(xian)(xian)(xian)的直(zhi)徑一(yi)樣大，1就(jiu)是(shi)PE接(jie)(jie)地(di)線(xian)(xian)(xian)單獨是(shi)一(yi)個直(zhi)徑；4+1 就(jiu)是(shi)一(yi)條(tiao)電(dian)纜(lan)(lan)由4條(tiao)線(xian)(xian)(xian)，其中一(yi)條(tiao)線(xian)(xian)(xian)用于接(jie)(jie)火線(xian)(xian)(xian)（L1相線(xian)(xian)(xian)），一(yi)條(tiao)線(xian)(xian)(xian)用于接(jie)(jie)零線(xian)(xian)(xian)（N中性線(xian)(xian)(xian)），一(yi)條(tiao)線(xian)(xian)(xian)用于接(jie)(jie)接(jie)(jie)地(di)線(xian)(xian)(xian)（PE接(jie)(jie)地(di)保護線(xian)(xian)(xian)）也行。

 生產部