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Electrical Earthing System Design & Soil Resistivity Testing

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BS EN 50522-2010

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Your Standard Earthing Design – Are They Valid Anymore?

A number of organisations across the UK recommend a standard earthing design when building smaller scale substations. The key driver behind these is one of cost. Nobody wants to pay more than they have to. For an HV connection using a templated approach to meet Earthing Standards compliance kind of makes sense – or does it?

So, the question is – does installing a standard earthing design meet your obligations under the Electricity at Work regulations?

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Soil Resistivity Testing Ground Soil Resistivity

Ground Soil Resistivity is Part 1 of a series of short posts on Soil Resistivity Testing and the common mistakes encountered, with practical advice on how to avoid the Soil Resistivity Testing 10 Common Mistakes.

Soil Resistivity Testing 10 Common Mistakes

What is Ground Soil Resistivity?

‘Soil‘ is the term used in Electrical Earthing Design to define the upper geology, which is of particular interest to us when designing earthing or grounding systems.  The soil is the local geology consisting of layers that are primarily composed of minerals, mixed with at least some organic matter, which differs from their parent materials in their texture, structure, consistency, colour, chemical, biological and other characteristics.

Geologists might refer to soil as the combination of ‘drift’ and/or bedrock.  The layman might refer to Soil more as ‘dirt’ or ‘ground’ (not to be confused with the American term).

The soil is the loose covering of fine rock particles that covers the surface of the earth. The soil is the end product of the influence of the climate, relief (slope), organisms, parent materials (original minerals), and time. (http://en.wikipedia.org/wiki/Soil)

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