In case you've missed our over view about cable designing ( Cable Designers guide: Conductor selection ) you could check it out here . Through this email we will further go into more detail regarding cable designing and talk about selection of copper conductors. Copper conductor used in cables industry usually complies with the following standards: IS 8130 HD 383 IEC 60228 Factors to be considered while deciding the size of the conductor Current carrying capacity Distance - If current/ signal needs to pass a long distance from one end to the other end distance plays an important role in deciding the size of the conductor. Because longer the length higher the voltage drop. You could find a voltage drop calculator here . Factors considered while selecting the type of conductor Type 1: Usually used for solid applications. Can be used only in circular form Type 2: Can be used for solid or moderate flexing applications. Shaped con...