TABLE III-A. Details of annealed copper conductors (soft metric conversion).
Conductor Area
Max Resistance of Conductor
Diameter of stranded conductor
( m2)
(ohms/km at
Stranding
Allowable
Nominal
20 °C) Soft or Annealed
Max (mm)
Elon-
(no. of
Size
mo. of
dia. of
Copper
K-
Sm dia
Gen'l purpose
gation
strands X
desig-
missing
individual
value
Nominal
Min
Silver
Nickel
Tin
(% min)
AWG of
nation
strands
strands
Minimum
2/ (all)
(mm)
(SCC/
(NCC/
(SCC/
(NCC/
coated
coated
coated
(mm) 1/
strands)
(max)
SCC1)
TCC)
SCC1)
TCC)
(SCC/
(NCC)
(TCC)
SCC1)
30
0.0568
0.0517
.77
7x38
0
0.102
0.267
0.315
0.340
0.315
0.340
330.4
363.2
355.6
6
28
0.0887
0.0816
1.05
7x36
0
0.127
0.343
0.391
0.417
0.391
0.417
209.3
222.8
225.1
6
26
0.1540
0.1393
1.34
19x38
0
0.102
0.445
0.493
0.518
0.518
0.544
126.0
138.5
133.5
6
24
0.2407
0.2199
1.18
19x36
0
0.127
0.572
0.620
0.620
0.645
0.671
79.7
85.0
86.0
6
22
0.3821
0.3517
1.87
19x34
0
0.160
0.724
0.772
0.798
0.823
0.848
49.5
52.5
53.1
10
20
0.6162
0.5711
1.34
19x32
0
0.203
0.927
0.975
1.00
1.03
1.05
30.2
32.1
32.4
10
18
0.9627
0.8969
1.34
19x30
0
0.254
1.16
1.23
1.25
1.28
1.31
19.0
20.0
20.4
10
16
1.229
1.146
1.19
19x29
0
0.287
1.31
1.38
1.41
1.46
1.48
14.8
15.6
15.8
10
14
1.941
1.809
1.38
19x27
0
0.361
1.64
1.74
1.76
1.84
1.86
9.45
9.84
10.0
10
12 1/
3.085
2.874
1.67
19x25
0
0.455
2.07
2.17
2.19
2.30
2.35
5.97
6.20
6.30
10
12 1/
2.976
2.773
1.26
37x28
0
0.320
2.12
2.22
2.27
2.27
2.30
6.23
6.50
6.63
10
10
4.740
4.416
1.35
37x26
0
0.404
2.69
2.79
2.84
2.84
2.90
3.90
4.07
4.13
10
8 3/
0.605
8.434
2.29
133x29
0
0.287
4.01
4.22
4.29
4.29
4.39
2.16
2.28
2.30
10
6 3/
13.59
13.32
2.31
133x27
0
0.361
5.03
5.28
5.38
5.41
5.51
1.37
1.43
1.46
10
4 3/
21.59
21.16
2.55
133x25
0
0.455
6.35
6.68
6.81
6.81
6.96
0.866
0.902
0.919
10
2 3/
33.70
32.92
3.21
665x30
2
0.254
8.13
8.64
8.64
0.558
0.581
0.600
10
1 3/
41.40
40.47
2.89
817x30
2
0.254
9.14
9.65
9.65
0.456
0.472
0.489
10
01 3/
52.95
51.75
3.24
1,045x30
3
0.254
10.0
10.8
10.8
0.354
0.371
0.381
10
02 3/
67.39
65.90
3.15
1,330x30
3
0.254
11.2
12.1
12.1
0.279
0.292
0.299
10
03 3/
84.37
82.49
3.09
1,665x30
4
0.254
12.7
13.7
13.7
0.223
0.233
0.233
10
04 3/
106.84
104.49
3.32
2,109x30
5
0.254
14.4
15.4
15.4
0.177
0.184
0.184
10
1/ For size 12, 37x28 is the preferred construction. 19x25 is inactive for new design.
2/ Nominal values are for information only. Nominal values are not requirements.
3/ SCC1 conductors are limited to limited to 30 - 10 AWG sizes.
THIS SOFT METRIC CONVERSION TABLE III-A PROVIDES A CROSS-REFERENCE TO TABLE II-A.
FOR INFORMATION ONLY
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