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AIM : DEMONSTRATION OF EARTHING PRINCIPLE.
Conclusion : The earthing system consists of a low impedance path made up of conductors between the metallic structures and the earth. A predetermined circuit is made available for the ground-fault current to flow through it rather than the random paths.
Question :
Q1 ] Explain the working of earthing in detail.
Ans : Earthing is used to protect you from an electric shock. It does this by providing a path (a protective conductor) for a fault current to flow to earth. It also causes the protective device (either a circuit-breaker or fuse) to switch off the electric current to the circuit that has the fault.
In electricity supply systems, an earthing system or grounding system is circuitry which connects parts of the electric circuit with the ground, thus defining the electric potential of the conductors relative to the Earth’s conductive surface. The choice of earthing system can affect the safety and electromagnetic compatibility of the power supply.
A solid copper grounding rod, also called grounding electrode, driven into the soil outside of the house and connected to the main electrical panel by a single earth-grounding wire is the primary method of earthing modern household electrical systems. Since electricity follows the path of least resistance, an appropriately earthed electrical system discharges harmful power surges to the soil safely.
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