Nickel-chromium wire (80Ni-20Cr) is proven to deliver outstanding performance over extended periods of time and is the same wire uses in our own electrical heating elements
Resistance Wire - Current vs. Temperature
Current Carrying Capacity of Straight Nickel Chromium Wire, Approximate amperes to heat a straight, oxidized wire in quiet air to given temperature
°F
400
600
800
1000
1200
1400
°C
205
315
427
538
649
760
AWG or B & S
Inches Dia.
Amperes
15
0.057
7.2
10.0
12.8
16.1
20.0
24.5
16
0.051
6.4
8.7
10.9
13.7
17.0
20.9
17
0.045
5.5
7.5
9.5
11.7
14.5
17.6
18
0.040
4.8
6.5
8.2
10.1
12.2
14.8
19
0.036
4.3
5.8
7.2
8.7
10.6
12.7
20
0.032
3.8
5.1
6.3
7.6
9.1
11.0
21
0.0285
3.3
4.3
5.3
6.5
7.8
9.4
22
0.0253
2.9
3.7
4.5
5.6
6.8
8.2
23
0.0226
2.58
3.3
4.0
4.9
5.9
7.0
24
0.0201
2.21
2.9
3.4
4.2
5.1
6.0
25
0.0179
1.92
2.52
3.0
3.6
4.3
5.2
26
0.0159
1.67
2.14
2.60
3.2
3.8
4.5
27
0.0142
1.44
1.84
2.25
2.73
3.3
3.9
28
0.0126
1.24
1.61
1.95
2.38
2.85
3.4
29
0.0113
1.08
1.41
1.73
2.10
2.51
2.95
30
0.0100
0.92
1.19
1.47
1.78
2.14
2.52
31
0.0089
0.77
1.03
1.28
1.54
1.84
2.17
32
0.0080
0.68
0.90
1.13
1.36
1.62
1.89
33
0.0071
0.59
0.79
0.97
1.17
1.40
1.62
34
0.0063
0.50
0.68
0.83
1.00
1.20
1.41
35
0.0056
0.43
0.57
0.72
0.87
1.03
1.21
36
0.0050
0.38
0.52
0.63
0.77
0.89
1.04
37
0.0045
0.35
0.46
0.57
0.68
0.78
0.90
38
0.0040
0.30
0.41
0.50
0.59
0.68
0.78
39
0.0035
0.27
0.36
0.42
0.49
0.58
0.66
40
0.0031
0.24
0.31
0.36
0.43
0.50
0.57
Current Carrying Capacity of Ribbon
Nickel Chromium Wire, At 1200°F Approximate
Width-Inches
Thickness in Inches
1/64
1/32
1/16
3/32
1/8
3/16
Amps
0.0063
1.56
2.89
5.5
8.2
8.2
16.6
0.0056
1.45
2.69
5.2
7.2
7.2
15.6
0.0050
1.35
2.52
4.9
6.8
6.8
14.7
0.0045
1.26
2.38
4.6
6.4
6.4
14.0
0.0040
1.18
2.23
4.1
6.0
6.0
13.1
0.0035
1.09
2.07
3.8
5.6
5.6
12.3
0.0031
1.01
1.94
3.6
5.3
5.3
11.5
0.0020
—
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—
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0.0015
4
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The current values above are based on actual tests of single strands of oxidized wire mounted in quiet air and operated at 1200°F. The tables are calculated for wire having a resistivity at 1200°F and a total surface watts-density of 28 W per square inch.
Ordering Example: (1) NCRR-15-100 100' spool of 0.0035, ¥48,024
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