Objective of Earthing

  • To ensure safety of life and property from hazards of electric shock and electric fires.
  • To ensure that system voltages on healthy lines remain within reasonable limits under fault Conditions thereby preventing insulation breakdowns.
  • To provide a low impedance path (safe path) to dissipate lightning and short circuit currents.
  • To minimize arcing burn downs as in an earthed system arcing fault would produce a current in ground path thereby providing an easy means of detecting and tripping against phase to earth arcing fault breakdowns.
  • To provide stable platform for operation of sensitive  electronic equipments   i.e. To maintain the voltage at any part of an electrical system at a known value so as to prevent over current or excessive voltage on the appliances or equipment.
  • To provide an alternative path for induced current and minimize the electrical noise in cables.
  • To provide protection against static electricity from friction.

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