Conductor Resistance

Electrical Resistance of Copper Conductors(mm2)


Nominal
Section
(mm2)

Min.No.of
Wires
Class 2

Max.Wire Dia.
Class 5(mm)

Max.Wire Dia.
Class 6(mm)

Max.Conductor Resistance (Ohm/km at 20℃)
Class 2                Class 5 and Class 6

Copper

Copper

0.5
0.75
1.0
1.5
2.5
4
6
10
16
25
35
50
70
95
120
150

7
7
7
7
7
7
7
7
7
7
7
19
19
19
37
37

0.21
0.21
0.21
0.26
0.26
0.31
0.31
0.41
0.41
0.41
0.41
0.41
0.51
0.51
0.51
0.51

0.16
0.16
0.16
0.16
0.16
0.16
0.21
0.21
0.21
0.21
0.21
0.31
0.31
0.31
0.31
0.31

36
24.5
18.1
12.1
7.41
4.61
3.08
1.83
1.15
0.73
0.52
0.39
0.27
0.19
0.15
0.12

39
26
19.5
13.3
7.98
4.95
3.3
1.91
1.21
0.78
0.55
0.38
0.27
0.20
0.16
0.13

Electrical Resistance of Copper Conductors(AWG)


Section
(AWG)

Section
(mm2)

Conductor

Max. Conductor Resistance
(Ohm at 20℃)

No.of
Wires

Single Wire (mm) Dia.

Copper

0
0
1
1
2
2
2
4
4
6
6
8
10
10
10
12
12
12
12
14
14
14
16
16
16
18
18
18
18
20
20
20
20
22
22
22
24
24
24
26
26
26

52.95
53.116
41.397
42.112
33.696
33.201
34.416
21.231
21.625
13.611
13.764
8.604
5.317
4.74
5.26
3.293
2.98
3.08
3.31
2.078
1.854
2.08
1.317
1.229
1.31
0.963
0.811
0.897
0.827
0.615
0.507
0.562
0.519
0.382
0.355
0.324
0.241
0.227
0.205
0.155
0.141
0.128

1045
259
817
259
665
259
133
418
133
266
133
133
105
37
1
65
37
19
1
41
19
1
26
19
1
19
16
7
1
19
10
7
1
19
7
1
19
7
1
19
7
1

0.254
0.510
0.254
0.455
0.254
0.404
0.574
0.255
0.455
0.254
0.363
0.287
0.254
0.404
2.588
0.254
0.321
0.455
2.052
0.254
0.361
1.628
0.254
0.287
1.291
0.254
0.254
0.404
1.023
0.203
0.254
0.320
0.813
0.160
0.254
0.643
0.127
0.203
0.511
0.102
0.160
0.404

0.35
0.38
0.40
0.45
0.5
0.6
0.5
0.8
0.9
1.5
1.5
2.0
3.2
3.6
3.4
5.7
6.8
4.8
5.4
8.3
8.9
8.6
13.1
14.1
13.7
17.9
21.3
19.2
21.8
28.3
33.9
33.8
34.6
45.1
48.4
55.3
69.2
76.4
89.4
113.0
122.0
138.8