1.电阻率低(di)：铝(lv)芯(xin)电缆(lan)(lan)的电阻率比铜芯(xin)电缆(lan)(lan)约高1.68倍。

2.延展性好：铜(tong)合金(jin)的(de)延展率(lv)为(wei)20~40%,电工用铜(tong)的(de)延展率(lv)在30%以上，而铝合金(jin)仅为(wei)18%。

3.强度高(gao)(gao)：常(chang)温下(xia)的允许(xu)应(ying)力，铜(tong)比铝(lv)分别(bie)高(gao)(gao)出7~28%。特(te)别(bie)是高(gao)(gao)温下(xia)的应(ying)力，两(liang)者(zhe)相差更是甚远。

4.抗疲(pi)劳：铝材(cai)反复折(zhe)弯易断(duan)裂，铜则(ze)不易。弹性指(zhi)标方面，铜也比铝高约1.7~1.8倍。

5.稳定性好，耐(nai)腐(fu)(fu)蚀(shi)：铜芯(xin)抗氧化，耐(nai)腐(fu)(fu)蚀(shi)，而铝(lv)芯(xin)容易受氧化和腐(fu)(fu)蚀(shi)。

6.载(zai)流(liu)量(liang)(liang)大(da)(da)：由于电(dian)(dian)阻率(lv)低(di)，同(tong)截面的(de)铜芯(xin)电(dian)(dian)缆要(yao)比铝芯(xin)电(dian)(dian)缆允许的(de)载(zai)流(liu)量(liang)(liang)(能够通过的(de)最大(da)(da)电(dian)(dian)流(liu))高30%左右。

7.电(dian)(dian)(dian)(dian)(dian)压损(sun)失低：由于铜芯电(dian)(dian)(dian)(dian)(dian)缆(lan)的(de)(de)电(dian)(dian)(dian)(dian)(dian)阻(zu)率(lv)低，在(zai)同截面流(liu)过相同电(dian)(dian)(dian)(dian)(dian)流(liu)的(de)(de)情况(kuang)下。铜芯电(dian)(dian)(dian)(dian)(dian)缆(lan)的(de)(de)电(dian)(dian)(dian)(dian)(dian)压降小。同样的(de)(de)输(shu)电(dian)(dian)(dian)(dian)(dian)距(ju)离(li)，能保证较高的(de)(de)电(dian)(dian)(dian)(dian)(dian)压质量(liang)(liang);在(zai)允许的(de)(de)电(dian)(dian)(dian)(dian)(dian)压降条件下，铜芯电(dian)(dian)(dian)(dian)(dian)缆(lan)输(shu)电(dian)(dian)(dian)(dian)(dian)能达到较远的(de)(de)距(ju)离(li)，即供电(dian)(dian)(dian)(dian)(dian)覆盖面积大，有(you)利于网络的(de)(de)规划，减少供电(dian)(dian)(dian)(dian)(dian)点的(de)(de)设置数量(liang)(liang)。

8.发热温度(du)低：在同样的(de)电流下，同截(jie)面的(de)铜芯电缆(lan)的(de)发热量比(bi)铝芯电缆(lan)小得多，使(shi)得运行更(geng)安(an)全。

9.能耗(hao)低：由于铜的(de)(de)电(dian)(dian)阻率(lv)(lv)低，相比(bi)铝电(dian)(dian)缆而言，铜电(dian)(dian)缆的(de)(de)电(dian)(dian)能损耗(hao)低，这是显(xian)而易见的(de)(de)。这有利于提高发(fa)电(dian)(dian)利用率(lv)(lv)和保护环境。

10.抗氧(yang)(yang)化，耐(nai)腐蚀：铜芯(xin)电(dian)缆的连接头性能稳定，不(bu)(bu)会由于(yu)(yu)氧(yang)(yang)化而发(fa)生(sheng)事(shi)故(gu)。铝芯(xin)电(dian)缆的接头不(bu)(bu)稳定时常(chang)会由于(yu)(yu)氧(yang)(yang)化使(shi)接触电(dian)阻增大，发(fa)热而发(fa)生(sheng)事(shi)故(gu)。因此，事(shi)故(gu)率比(bi)铜芯(xin)电(dian)缆大得多。

11.施工方便(bian)：

铜(tong)芯柔性(xing)好，允许的弯度(du)半径小，所以拐(guai)弯方便，穿管容易;

铜芯抗疲(pi)劳、反(fan)复折弯(wan)不易断裂，所以接线(xian)方便;

于铜芯的机(ji)械(xie)强(qiang)度高，能承受较大的机(ji)械(xie)拉(la)力，给(ji)施工(gong)敷设带来很大便利(li)，也为机(ji)械(xie)化(hua)施工(gong)创造了条件。