The current division factors = 0.8 of given fault current shall be taken for design calculations of ground mesh. The rating of the mesh conductors shall be compatible with the fault currents after allowing for parallel paths with a minimum conductor size of 300 mm 2 copper. Due regard shall be given to non-linear distribution of the fault current giving rise to the highest potentials at mesh corners. The mesh system shall be designed in accordance with above sub-title "Design calculations" above to limit touch, step and mesh potentials taking into account the combined length of the mesh conductors, other buried conductors and rods but excluding any buried conductors outside the perimeter fence. Mesh System as Earthing or Grounding Electrode
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The earth potential rises shall not exceed the ITU limits appropriate to the classification of the system unless special precautions are taken to cater for transferred potentials. Requirements for a high resistance surface layer.Step, touch and mesh potentials inside and outside the perimeter fence (see fence earthing and bonding).
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Earth resistance of the whole system of its components.The calculations shall include the following parameters: The design calculations shall be to the approval of the Engineer and shall be based on the methods given in the standards listed. Design Calculation Of The Earth / Ground Electrode