Why fences grounding are important?

1.	Why fences grounding are important?
Answer» Because the most dangerous touch contacts involves and outside the fence are usually accessible to the general public. In order to minimise the effect of step potential and touch potential following two philosophies could be adopted. a. Inclusion of the fence within the ground grid area and b. Placement of fence outside the ground grid area – not safe to use. With this effective area is increased and reduces ground grid resistance substantially and maximum ground – grid voltage rise as well. In this case the perimeter conductor of grid normally either follow the fence line, or parallel to it at a short distance about 0.5 m – 1.5 m outside. In either case, the perimeter ground conductor and fence are bonded electrically at frequent intervals.

Answer»

Because the most dangerous touch contacts involves and outside the fence are usually accessible to the general public. In order to minimise the effect of step potential and touch potential following two philosophies could be adopted.

a. Inclusion of the fence within the ground grid area and

b. Placement of fence outside the ground grid area – not safe to use.

With this effective area is increased and reduces ground grid resistance substantially and maximum ground – grid voltage rise as well. In this case the perimeter conductor of grid normally either follow the fence line, or parallel to it at a short distance about 0.5 m – 1.5 m outside. In either case, the perimeter ground conductor and fence are bonded electrically at frequent intervals.

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