What are Insulators and Conductors? Conductors are materials that allow the flow of electricity, while insulators are materials that do not allow the flow of electricity.

Insulators and conductors play different roles in electrical power system. Insulators are used for suspending, supporting and insulating, and conductors are used for transporting the flow of electricity.

Insulators and conductors in power system:
Insulators: wooden poles, porcelain or silicone rubber composite insulators, the coating of cables
Conductors: wire, steel crossarm, insulator pins, steel towers and so on
An electrical insulator is a material whose internal electric charges do not flow freely, and therefore make it very hard to conduct an electric current under the influence of an electric field.
Insulator is also required where the wire enters buildings or electrical devices to insulate the wire from the case.

Insulators and conductors are due to the electrical properties of different materials. Real-world examples help you understand the importance of conductors and insulators and how each reacts to electric current. You will also know how to perform simple tests to identify materials that are conductors and insulators.

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