State necessity of earthing.
Necessity of earthing:
1. Earthing is grounding the body of the electrical equipment to avoid the hazards due to leakage current. If the leakage current keeps circulating in the body of the equipment, it might result in electrical shocks
2. Earthing is necessary for better voltage regulation and protection from surges and lightning strikes.
3. To provide safe path to dissipate lightning and short circuit currents.
4. To provide stable platform for operation of sensitive electronic equipment.