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The DC resistance of copper wire increases with increasing temperature in accordance with the formula:
On the basis of the above formula, we now generate a table of correction factors for copper conductors in operating in the temperature range 25 – 200 degree celsius:
On the basis of the above formula, we now generate a table of correction factors for copper conductors in operating in the temperature range 25 – 200 degree celsius:
Temperature (0C)
|
Multiplying Factor
|
25
|
1.000
|
40
|
1.058
|
50
|
1.096
|
55
|
1.116
|
60
|
1.135
|
65
|
1.154
|
70
|
1.173
|
75
|
1.193
|
80
|
1.212
|
85
|
1.231
|
90
|
1.250
|
100
|
1.289
|
105
|
1.308
|
125
|
1.385
|
130
|
1.404
|
150
|
1.482
|
200
|
1.674
|
