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Indian Electricity Rules specify the cases where earthing is required. The resistance of the ground to these earthing should be checked

Indian Electricity Rules specify the cases where earthing is required. The resistance of the ground to these earthing should be checked Correct Answer at least once a year

Indian Electricity Rules, 1956:

  • The resistance of the ground to the earthing should be checked at least once a year.
  • Earthing should be provided at a height not less than 3.0 m from the ground.
  • The resistance of the earth continuity conductor should not be more than 1 Ω though out the system.
  • Neutral conductor of three-phase, four-wire system and middle conductor of two phases, three-wire systems shall be earthed by two separate and distinct connections with a minimum of two earthing electrodes in order to bring earth resistance to a satisfactory low value.

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