Peak Cables - Electrical Characteristics of Pure Nickel Conductors
Unit 5, Gisborne Close, Ireland Business Park, Staveley, Chesterfield, S43 3JT
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Electrical Characteristics of Pure Nickel Conductors

 

Table 2 – Maximum current carrying capacities for glass fibre insulated pure nickel conductors in ambient air at 30°C:

Conductor
No/mm
Nom CSA
mm²
Maximum conductor working temperature.
155°c
Amps
180°C
Amps
200°C
Amps
250°C
Amps
16/0.20 0.5 4 5 6 7.5
7/0.315 0.5 4 5 6 7.5
23/0.193 0.7 5 6 7 9
10/0.315 0.8 6 7 8 10
32/0.18 0.8 6 7 8 10
15/0.315 1.2 10 10.75 1 11.5
40/0.193 1.2 10 10.75 1 11.5
30/0.25 1.5 14 15 16 17
70/0.193 2.0 17 18 19 20
50/0.25 2.5 20 21 22 23
44/0.315 3.4 24 25 27 28
56/0.30 4.0 25 26 28 29
63/0.315 4.9 27 28 30 31
84/0.30 5.9 30 31 33 34

 

Table 3 – De-rating factors for cables placed in above-ambient temperatures:

Ambient Temp °C 40 60 80 100 120 140 160 180 200 220 240
Maximum
Conductor
Temperature
155 0.96 0.87 0.76 0.65 0.50 0.29          
180 0.97 0.89 0.82 0.73 0.63 0.51 0.36        
200 0.97 0.91 0.84 0.77 0.69 0.59 0.49 0.34      
250 0.98 0.93 0.88 0.83 0.77 0.71 0.64 0.56 0.48 0.37 0.20

 

Table 4 – Nickel Electrical Resistivity at elevated temperatures:

Temperature
⁰C
20 100 200 300 400 500 600
Resistivity
μ Ω cm
9 13 19 26 33 37 40

 

Table 5 – De-rating Factors for Bundled Wires. (Guidance Only):

No. of Wire Factor No. of Wires Factor
2 0.80 8 0.50
3 0.70 10 0.46
4 0.65 15 0.40
5 0.60 20 0.36
7 0.55 25 0.33

 

These figures represent empirical data generated from our general experience.  We strongly recommend Pure Nickel Cables are checked in the apparatus in which the cables will be placed, under the worst possible running conditions.