Explain importance and purpose of earthing. 
in Testing and maintenance of electrical equipments by

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Importance and purpose of earthing is as below:- 1. To provide an alternative path for the leakage current to flow towards earth. 2. To save human life from danger of electrical shock due to leakage current. 3. To protect high rise buildings structure against lightening stroke lightening arrester is used for this there is necessity of earthing. 4. To provide stable platform for operation of sensitive electronic equipments there is necessity of earthing. 5. For proper working of earth fault protection system, there is necessity of earthing. 6. To keep the potential of equipment body (frame) below the earth potential in the event of fault from safety point of view. 
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