A conductor is a material that offers little resistance to the flow of energy such as heat or electricity.

When talking about conductors, we are generally referring to electrical conductors, but you are reminded that, in automotive engineering, the term 'conductor' can also be used in the context of heat conduction.

The most commonly used electrical conductor in plant vehicle electrics is copper, because it has low resistance and is plentiful and is relatively inexpensive.

You should remember that all conductors offer some resistance to the flow of electricity. For example, when bringing electricity to a starting motor, it is important to keep cable runs as short as possible, in order to minimise voltage drop. You will also see that the heavy duty cable that brings current to the motor has a large cross-sectional area in order to minimise resistance and voltage drop.

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