Electrical Cables
A cable carrying alternating current has

Hysteresis losses only
Hysteresis, leakage, copper and friction losses
Hysteresis and leakage losses only
Hysteresis, leakage and copper losses only

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Electrical Cables
Solid type cables are considered unreliable beyond 66 kV because

There is a danger of breakdown of insulation due to the presence of voids
Of corona loss between conductor and sheath material
Skin effect dominates on the conductor
Insulation may melt due to higher temperature

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