Describe construction of power cables. Also, explain various types of faults in power cables.

The construction of power cables involves several key components designed to ensure safe and efficient electricity transmission over long distances. A typical power cable consists of the following layers:

1. Conductor: The core of a power cable is typically made of copper or aluminum, as these metals offer excellent electrical conductivity. Copper is more efficient but costlier, while aluminum is lighter and more economical. The conductor carries the electrical current and must be durable and resistant to corrosion.

2. Insulation: Surrounding the conductor is an insulating material that prevents short circuits and electrical leakage. The insulation material is typically made from thermoplastic or thermoset materials like PVC (polyvinyl chloride), polyethylene, or rubber. This layer ensures that electricity only flows through the conductor and not to other parts of the cable.

3. Conductor Shield: A conductor shield is often used to protect the insulation and provide uniform electric field distribution. ____ _________ ________ _______ ______ ______.
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