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2. Groundbed - Wikipedia

   en.wikipedia.org/wiki/Groundbed

   The electrodes for electrical grounding are often called ground rods and are often made from steel with a copper clad surface – typically 1 to 2 m long and 20 millimetres (0.79 in) in diameter. These are driven vertically into the ground and bonded together with bare copper wire. [1]

3. Earthing system - Wikipedia

   en.wikipedia.org/wiki/Earthing_system

   There are several types derived from copper and steel: copper-bonded, stainless-steel, solid copper, galvanized steel ground. In recent decades, there has been developed chemical grounding rods for low impedance ground containing natural electrolytic salts. [31] and Nano-Carbon Fiber Grounding rods. [32]

4. Ring ground - Wikipedia

   en.wikipedia.org/wiki/Ring_ground

   In the U.S., the National Electrical Code specifies that ring grounds must be constructed from #2 or thicker wire, must be buried at least 2 1/2 feet underground, and must have at least 20 feet of exposed copper to ensure good electrical contact with the earth. [1]

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6. Copper-clad steel - Wikipedia

   en.wikipedia.org/wiki/Copper-clad_steel

   Copper-clad steel (CCS), also known as copper-covered steel or the trademarked name Copperweld is a bi-metallic product, mainly used in the wire industry that combines the high mechanical strength of steel with the conductivity and corrosion resistance of copper. It is mainly used for grounding purposes, line tracing to locate underground ...

7. Ground (electricity) - Wikipedia

   en.wikipedia.org/wiki/Ground_(electricity)

   To reduce this loss these antennas often use a conductive copper ground screen under the antenna connected to the buried ground wires, either lying on the ground or elevated a few feet, to shield the ground from the electric field. In a few cases where rocky or sandy soil has too high a resistance for a buried ground, a counterpoise is used. [11]