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2. Electric power transmission - Wikipedia

   en.wikipedia.org/wiki/Electric_power_transmission

   Electric power can be transmitted by underground power cables. Underground cables take up no right-of-way, have lower visibility, and are less affected by weather. However, cables must be insulated. Cable and excavation costs are much higher than overhead construction. Faults in buried transmission lines take longer to locate and repair.

3. Electrical cable - Wikipedia

   en.wikipedia.org/wiki/Electrical_cable

   An electrical cable is an assembly of one or more wires running side by side or bundled, which is used as an electrical conductor to carry electric current. Electrical cables are used to connect two or more devices, enabling the transfer of electrical signals or power from one device to the other. Physically, an electrical cable is an assembly ...

4. Electrical resistivity and conductivity - Wikipedia

   en.wikipedia.org/wiki/Electrical_resistivity_and...

   The SI unit of electrical resistivity is the ohm - metre (Ω⋅m). [1][2][3] For example, if a 1 m3 solid cube of material has sheet contacts on two opposite faces, and the resistance between these contacts is 1 Ω, then the resistivity of the material is 1 Ω⋅m. Electrical conductivity (or specific conductance) is the reciprocal of ...

5. Copper conductor - Wikipedia

   en.wikipedia.org/wiki/Copper_conductor

   Copper is the electrical conductor in many categories of electrical wiring. [3][4] Copper wire is used in power generation, power transmission, power distribution, telecommunications, electronics circuitry, and countless types of electrical equipment. [5] Copper and its alloys are also used to make electrical contacts.

6. North American power transmission grid - Wikipedia

   en.wikipedia.org/wiki/North_American_power...

   The electric power transmission grid of the contiguous United States consists of 120,000 miles (190,000 km) of lines operated by 500 companies. The electrical power grid that powers Northern America is not a single grid, but is instead divided into multiple wide area synchronous grids. [1] The Eastern Interconnection and the Western ...

7. History of electric power transmission - Wikipedia

   en.wikipedia.org/wiki/History_of_electric_power...

   History of electric power transmission. Electric power transmission, the tools and means of moving electricity far from where it is generated, date back to the late 19th century. They include the movement of electricity in bulk (formally called "transmission") and the delivery of electricity to individual customers ("distribution").