TABLE II-D. Details of 27% nickel coated (NHC/NHA) conductor.
Max resistance of
Stranding
Allowable
Nominal
Minimum
Maximum
conductor
Elongation
Conductor area
diameter
diameter
Size
(no of
no. of
dia. of
(circular mils)
(ohms/1000 ft at
(%, Min)
K-
desig-
strands
missing
individual
of stranded
of stranded
20 °C
value
nation
X AWG of
strands
strands
conductor
conductor
Nominal
strands)
(Max)
(Inch) 1/
(Inch)
(Inch)
Minimum
(NHC)
(NHA)
(NHC)
(NHA)
(all) 1/
22
754
694
1.87
19x34
0
0.0063
0.0290
0.0336
23.7
25.6
10
6
20
1,216
1,127
1.34
19x32
0
0.0080
0.0365
0.0415
14.6
15.3
10
6
18
1,900
1,770
1.34
19x30
0
0.0100
0.0455
0.0520
9.14
9.59
10
6
16
2,426
2,261
1.19
19x29
0
0.0113
0.0520
0.0610
6.85
7.30
10
6
14
3,831
3,570
1.38
19x27
0
0.0142
0.0650
0.0740
4.32
10
12
6,088
5,672
1.67
19x25
0
0.0179
0.0820
0.0940
2.78
10
10
9,880
8,716
1.35
49x27
0
0.0142
0.123
0.129
1.68
10
8
16,983
16,645
2.29
133x29
0
0.0113
0.158
0.179
0.936
10
6
26,818
26,284
2.31
133x27
0
0.0142
0.198
0.218
0.591
10
4
42,615
41,767
2.55
133x25
0
0.0179
0.250
0.272
0.375
10
2
66,500
64,981
3.21
665x30
2
0.0100
0.320
0.345
0.241
10
1
81,700
79,878
2.89
817x30
2
0.0100
0.355
0.384
0.196
10
01
104,500
102,126
3.24
1,045x30
3
0.0100
0.395
0.432
0.153
10
02
133,000
130,059
3.15
1,330x30
3
0.0100
0.440
0.490
0.120
10
03
166,500
162,795
3.09
1,665x30
4
0.0100
0.500
0.548
0.096
10
04
210,900
206,213
3.32
2,109x30
5
0.0100
0.565
0.615
0.077
10
1/ Nominal values are for information only. Nominal values are not requirements.
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