TABLE III-D. Details of 27 percent nickel coated (NHC/NHA) conductor (soft metric conversion).
Diameter of
Max resistance
Elongation
Cross-sectional
stranded
of conductor
(%, Min)
Allowable
Stranding
Nominal
area (mm2)
conductor
(ohms/km
Size
no. of
(no. of
dia. of
K-
at 20 °C
desig-
missing
strands X
individual
value
nation
strands
AWG of
strands
Nominal
Min
Max
strands)
(max)
(mm) 1/
Minimum
(NHC)
(NHA)
(NHC)
(NHA)
(All)
(mm)
(mm)
1/
22
0.3821
0.3517
1.87
19x34
0
0.160
0.737
0.838
77.8
84.0
10
6
20
0.6162
0.5711
1.34
19x32
0
0.203
0.927
1.05
47.9
50.1
10
6
18
0.9627
0.8969
1.34
19x30
0
0.254
1.16
1.32
30.0
31.5
10
6
16
1.229
1.146
1.19
19x29
0
0.287
1.32
1.55
22.5
24.0
10
6
14
1.941
1.809
1.38
19x27
0
0.361
1.65
1.88
14.2
10
12
3.085
2.874
1.67
19x25
0
0.455
2.08
2.39
9.12
10
10
5.006
4.416
1.35
49x27
0
0.361
3.12
3.28
5.51
10
8
8.605
8.434
2.29
133x29
0
0.287
4.01
4.55
3.07
10
6
13.59
13.32
2.31
133x27
0
0.361
5.03
5.54
1.94
10
4
21.59
21.16
2.55
133x25
0
0.455
6.35
6.91
1.23
10
2
33.70
32.92
3.21
665x30
2
0.254
8.13
8.76
0.791
10
1
41.40
40.47
2.89
817x30
2
0.254
9.02
9.75
0.643
10
01
52.95
51.75
3.24
1,045x30
3
0.254
10.0
11.0
0.502
10
02
67.39
65.90
3.15
1,330x30
3
0.254
11.2
12.4
0.394
10
03
84.37
82.49
3.09
1,665x30
4
0.254
12.7
13.9
0.315
10
04
106.86
104.49
3.32
2,109x30
5
0.254
14.4
15.6
0.253
10
1/ Nominal values are for information only. Nominal values are not requirements.
THIS SOFT METRIC CONVERSION TABLE III-D PROVIDES A CROSS-REFERENCE TO TABLE II-D.
FOR INFORMATION ONLY
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