Electrical conductor
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In physics and electrical engineering, a conductor is an object or type of material that allows the flow of charge in one or more directions. Materials made of metal are common electrical conductors.
Overhead conductors carry electric power from generating stations to customers.
Insulator (electricity)
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An electrical insulator is a material in which electric current does not flow freely. The atoms of the insulator have tightly bound electrons which cannot readily move. Other materials—semiconductors
Ceramic insulator used on electrified railways. The ridged shape increases the surface distance along which electrical leakage could occur, thereby enhancing the insulator’s effectiveness, especially in wet or polluted conditions.
Three-core copper wire power cable, each core with an individual colour-coded insulating sheath, all contained within an outer protective sheath
PVC-sheathed mineral-insulated copper-clad cable with two conducting cores
Pin-type glass insulator for long-distance open-wire transmission for telephone communication