Underground cables help in ensuring uninterrupted power supply that are hitherto uncommon in overhead systems. The main hindrance in ensuring uninterrupted power supply through overhead systems is the non-availability of space in developed urban areas. - Dr B S Sreekanthan, M Shravanth Vasisht A cable is basically an insulated conductor and is used for underground (UG) transmission and distribution of electricity. Insulation is used to cover the conductor and provides isolation from the surroundings. It should possess high resistance, high dielectric strength, high mechanical strength and long durability.
maximum capacity of 1000 V (1KV). It is most widely used among all cables, applied frequently in electric power distribution and control cables that carry signals from electrical devices or switch gears to control room.
maximum of 11KV. Commonly used for electric power transmission at high voltage, it may be for underground or underwater. It helps in the reduction of power loss.
rating of between 22 KV and 33 KV. This uses low viscosity oils for impregnation.
rating of between 33 KV and 66 KV.
maximum voltage ratings beyond 132 KV.