The DC resistance of copper wire increases with increasing temperature in accordance with the formula:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhvVPbzhqE0bxUx9uSxYlUaHmNSVpc3Cip6E4_gvZ28C87EUX4X-dJq21HZrhaRSWtxXrnqrer6EnqsRSLBvR8ijN_0xDqIC2v_Ym4Fk-yC1YE5zNiYKjRDyzD38piZf3orW1EoghJHSdk/s400/Temperature+Correction+Factors+for+Resistance.jpg)
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:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhvVPbzhqE0bxUx9uSxYlUaHmNSVpc3Cip6E4_gvZ28C87EUX4X-dJq21HZrhaRSWtxXrnqrer6EnqsRSLBvR8ijN_0xDqIC2v_Ym4Fk-yC1YE5zNiYKjRDyzD38piZf3orW1EoghJHSdk/s400/Temperature+Correction+Factors+for+Resistance.jpg)
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 |
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