For effective lightning protection it is not necessarily the absolute value of earth resistance that is important, rather the way the earthing system is installed and how it is connected to the structure and the equipment to be protected.

It is often thought that earthing problems can simply be solved by improving or reducing earth resistance. Unfortunately this is not the case. Despite attempts to reduce the absolute earth resistance there will always be appreciable earth potential rise.

Using the Novaris Systematic Approach the creation of protection boundaries divides a structure into areas of equipotential where all equipment and protective earths are referenced to a single point within the boundary.

One earthing system is essential, this means all earths must be bonded together either directly or by the use of transient earthing clamps.

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