TABLE II-A. Details of annealed copper conductors.
Conductor area
Diameter of Stranded Conductor
(circular mils)
Max resistance of conductor
Stranding
Allowable Nominal
Max (Inch)
(ohms/1000 ft at 20 °C)
Elon-
Size
(no. of
no. of
dia. of
gation
Sm dia
Gen'l purpose
K-value
desig-
strands X
missing individual
(%
Nominal
Min
Silver
Nickel
Tin
nation
AWG of
strands
strands
Minimum
Min)
2/ (all)
(Inch)
(SCC/
(NCC/
(SCC/
(NCC/
coated
coated
coated
strands)
(Max)
(Inch) 1/
SCC1)
TCC)
SCC1)
TCC)
(SCC/
(NCC)
(TCC)
SCC1)
30
112
102
.77
7x38
0
0.0040
0.0105
0.0124
0.0134
0.0124
0.0134
100.7
110.7
108.4
6
28
175
161
1.05
7x36
0
0.0050
0.0135
0.0154
0.0164
0.0154
0.0164
63.8
67.9
68.6
6
26
304
275
1.34
19x38
0
0.0040
0.0175
0.0194
0.0204
0.0204
0.0214
38.4
42.2
41.3
6
24
475
434
1.18
19x36
0
0.0050
0.0225
0.0244
0.0244
0.0254
0.0264
24.3
25.9
26.2
6
22
754
694
1.87
19x34
0
0.0063
0.0285
0.0304
0.0314
0.0324
0.0334
15.1
16.0
16.2
10
20
1,216
1,127
1.34
19x32
0
0.0080
0.0365
0.0384
0.0394
0.0404
0.0414
9.19
9.77
9.88
10
18
1,900
1,770
1.34
19x30
0
0.0100
0.0455
0.0484
0.0494
0.0504
0.0514
5.79
6.10
6.23
10
16
2,426
2,261
1.19
19x29
0
0.0113
0.0515
0.0544
0.0554
0.0574
0.0584
4.52
4.76
4.81
10
14
3,831
3,570
1.38
19x27
0
0.0142
0.0645
0.0684
0.0694
0.0724
0.0734
2.88
3.00
3.06
10
12 1/
6,088
5,672
1.67
19x25
0
0.0179
0.0815
0.0854
0.0864
0.0904
0.0924
1.81
1.89
1.92
10
12 1/
5,874
5,473
1.26
37x28
0
0.0126
0.0835
0.0874
0.0894
0.0894
0.0904
1.90
1.98
2.02
10
10
9,354
8,716
1.35
37x26
0
0.0159
0.106
0.110
0.112
0.112
0.114
1.19
1.24
1.26
10
8 3/
16,983
16,645
2.29
133x29
0
0.0113
0.158
0.166
0.169
0.169
0.173
0.658
0.694
0.701
10
6 3/
26,818
26,284
2.31
133x27
0
0.0142
0.198
0.208
0.212
0.213
0.217
0.418
0.436
0.445
10
4 3/
42,615
41,767
2.55
133x25
0
0.0179
0.250
0.263
0.268
0.268
0.274
0.264
0.275
0.280
10
2 3/
66,500
64,981
3.21
665x30
2
0.0100
0.320
0.340
0.340
0.170
0.177
0.183
10
1 3/
81,700
79,878
2.89
817x30
2
0.0100
0.360
0.380
0.380
0.139
0.144
0.149
10
01 3/
104,500
102,126
3.24
1,045x30
3
0.0100
0.395
0.425
0.425
0.108
0.113
0.116
10
02 3/
133,000
130,059
3.15
1,330x30
3
0.0100
0.440
0.475
0.475
0.085
0.089
0.091
10
03 3/
166,500
162,795
3.09
1,665x30
4
0.0100
0.500
0.540
0.540
0.068
0.071
0.071
10
04 3/
210,900
206,213
3.32
2,109x30
5
0.0100
0.565
0.605
0.605
0.054
0.056
0.056
10
1/ For size 12, 37x28 is the preferred constructions. 19x25 is inactive for new design.
2/ Nominal values are for information only. Nominal values are not requirements.
3/ SCC1 conductors are limited to 30 - 10 AWG
sizes.
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