“The earthing is the connection of general mass of earth to electrical apparatus in such a manner that fault current will flow to earth without danger.”
The earth is made up of a material that is electrically conductive. A fault current will flow to earth through the live conductor, provided it is earthed. The Conventional system of Earthing is done by digging of a large pit into which a GI pipe or a Copper plate is positioned with the layers of charcoal and salt. When system is without earthing and if short circuit occurs and human body touches the metal part, current will get return path through human body.When system is properly earthed and if short circuit occurs and human body touches the metal part, current will not getpath through human body, because circuit is already provided with low resistance path through
earthing.
Purpose of Earthing
Provide an alternative path for the fault current to flow so that it will not put in danger the user
Ensure that all exposed conductive parts do not reach a dangerous potential
Maintain the voltage at any part of an electrical system.
The qualities of a good Earthing
Must be of low electrical resistance
Must be of good corrosion resistance
Must be able to dissipate high fault current repeatedly
The earth is made up of a material that is electrically conductive. A fault current will flow to earth through the live conductor, provided it is earthed. The Conventional system of Earthing is done by digging of a large pit into which a GI pipe or a Copper plate is positioned with the layers of charcoal and salt. When system is without earthing and if short circuit occurs and human body touches the metal part, current will get return path through human body.When system is properly earthed and if short circuit occurs and human body touches the metal part, current will not getpath through human body, because circuit is already provided with low resistance path through
earthing.
Purpose of Earthing
Provide an alternative path for the fault current to flow so that it will not put in danger the user
Ensure that all exposed conductive parts do not reach a dangerous potential
Maintain the voltage at any part of an electrical system.
The qualities of a good Earthing
Must be of low electrical resistance
Must be of good corrosion resistance
Must be able to dissipate high fault current repeatedly
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