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When current is passing through a wire it will encounter resistance from the wire, which creates a voltage drop. How much resistance the current encounters dependents on the type of material. Each material has its own resistance, the so-called resistivity. This is a constant value, for example copper, which is the most widely used material for electrical cables, is 0.0175 ohm.
To know the maximum distance of the cable or when there is a fixed distance, to know the best thickness of the cable, you can complete this form. The best values are immediately displayed and also e-mailed to you.