Copper and Aluminum Wire - Electrical Resistance

Electrical resistance in plain copper or aluminum wire

Electrical resistance in single core copper conductors:

Cross Sectional Area
(mm2)
Resistance
(ohm/km)
CopperAluminum
0.5 34.5 53
0.75 23 35.3
1.0 17.2 26.5
1.5 11.5 17.7
2.5 6.9 10.6
4.0 4.3 6.6
6.0 2.9 4.4
10 1.7 2.7
16 1.1 1.7
25 0.69 1.1
35 0.49 0.76
50 0.34 0.53
70 0.25 0.38
95 0.18 0.28
120 0.14 0.22
150 0.11 0.18
185 0.093 0.14
240 0.072 0.11
300 0.058 0.088
400 0.043 0.066
500 0.035 0.053
630 0.027 0.042

Copper and Aluminum wire - electrical resistance

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