Is there a minimum and maximum temperature that a copper wire/s will still work on. Meaning that current will still be able to go through them. Let's say that I have battery that is heated or cooled depending on the environment, and that battery controls a light, that is also heated or cooled, and the wires connecting it are exposed to cold or hot environment. Is there a specific temperature, max / min, that will ensure that current still passes through the wires. I know this might depend on the size of the copper wire, and the specific gauge, but I am considering wires between 18 and 26 AWG. I also figured out that the melting point of cooper is about 1,085 °C, therefore that will in theory be the maximum temperature that a copper wire will be able to operate, I assume. And I am not sure about the minimum temperature.
Electronic – Minimum and Maximum temperature for a copper wire to work
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Best Answer
The resistance of the wire changes with temperature. There is a given temperature coefficient of resistance for every material. For copper, it is 0.0039/°C. The new effective resistance of the wire is calculated by (deltaR)/(Ro)=(temperature coefficient of resistance)*(deltaT). So, if you know the resistance of the wire at ambient temperature, you can calculate its change in resistance at various temperatures. This will help you decide what size wires you need for a given temperature, or if the temperature is feasible at all.