All the people living or working in residential, commercial and industrial installations, particularly the operators and personnel who are in close operation and contact with electrical systems and machineries, should essentially be protected against possible electrification. To achieve this protection, earthing system of an installation is defined, designed and installed according to the standardrequirements.
What Is Earthing
The process of connecting metallic bodies of all the electrical apparatus and equipment to huge mass of earth by a wire is called Earthing.
The term earthing means connecting the neutral point of supply system or the non current carrying parts of the electrical apparatus to the general mass of earth in such a manner that all times an immediate discharge of electrical energy takes place
Objectives of the earthing
Provide an alternative path for the fault current to flow so that it will not endanger the user
Ensure that all exposed conductive parts do not reach a dangerous potential
Maintain the voltage at any part of an electrical system at a known value so as toprevent over current or excessive voltage on the appliances or equipment