Copper has been recognized for its unique and beneficial qualities in electrical applications. Copper is a malleable and ductile material with excellent conductivity. Our electrolytic copper is of high purity. We use copper (99.95%) which enables us to produce ultrafine wire down to a diameter of 10 microns. Copper magnet wire is available in diameters from 0.010mm to 0.500mm (AWG 58 - 24) with all insulation and self-bonding enamel types. How about the copper conductor resistance?
Since the electrical resistance of a conductor such as a copper conductor resistance is dependent upon collision processes within the wire, the copper conductor resistance could be expected to increase with temperature since there will be more collisions, and that is borne out by experiment. An intuitive approach to temperature dependence leads one to expect a fractional change in copper conductor resistance which is proportional to the temperature change.
The large the wire diameter, the less copper conductor resistance it has to the flow of electrons, and the more current it can carry without overheating. The table below list copper conductor resistance for various gauges of copper wire. These should be used as a rule of thumb as there are other factors that play into the current ratings of wire including ambient temperature, insulation temperature limit, air convection, etc.
As you can see, the high and low of copper conductor resistance are relevant with its size and area and influenced by many aspects.
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