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Electrical Earthing System Design & Soil Resistivity Testing

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What are the Earthing Safety Calculations?

Safety Calculations – you’re overdue an update!

If 1-ohm is still in circulation on your documentation then this section applies to you.

Even though the Safety Calculations for determining a System Earth (Ground) has shifted away from an arbitrary Resistance figure, usually <1 ohm.  It’s still all too common to see this outdated measure of installed success appear on client / employer requirement specifications(ER’s) as part of the Earthing Design Safety Calculations. [Read more…] about What are the Earthing Safety Calculations?

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A Round-Up of The 10 Most Read Posts of 2016

Well, 2016 was an exciting year for the team at GreyMatters. So, at the end of 2015, we set goals on what we wanted to achieve in 2016. Part of the plan was to focus on establishing this blog channel as an authority on Electrical Earthing Design and Lightning Protection.  Something that can be referred to and although some of the concepts are considered complex, the style of writing is hopefully easy to read and informative.

This post is a round-up of the ten most read posts of 2016, and interestingly not all of the most read posts are initially published in 2016 (you may have missed it). [Read more…] about A Round-Up of The 10 Most Read Posts of 2016

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What Exactly is a Soil Resistivity Desktop Study?

Before installing an electrical earthing system design, there are a couple of other essential tasks to tackle. One of these tasks is the ‘Soil Resistivity Desktop Study.’ This study illustrated in the Soil Resistivity Table below.

Historically installation companies may have offered to drive a single earth rod into the ground and take a range of readings from it at various depths as it is driven deeper. This approached is now considered totally unacceptable for anything other than the most basic of designs, e.g. a generator earth. [Read more…] about What Exactly is a Soil Resistivity Desktop Study?

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Understanding Electromagnetic Inference using Finite Element Analysis

Finite element analysis (FEA) is a computerized method for predicting how a product reacts to real-world forces, energies, vibration, heat, fluid flow, and other physical effects.

Finite element analysis shows how something will perform when stressed, whether it will break, wear out, or work the way it was designed BEFORE it is created, installed or built in the ‘real’ world.

It is called analysis, but in the product development process, it is used to predict what is going to happen when the product is used.

[Read more…] about Understanding Electromagnetic Inference using Finite Element Analysis

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What is The Importance of Earthing in Electrical Installation?

What is the importance of earthing in electrical installation?

Here’s a very personal story that explains not only “What” BUT…

…Why Earthing is Important to me

1. Back Story

How many times are you asked… ”What do you do for a living?”… For most of us, it’s quite an easy response “I do this… or I do that”… e.g. “I am an Engineer at a local practice”.  However, recently someone not only asked what I do but asked… “Wow, that’s interesting, you’re a Specialist Electrical Earthing Design Consultant – WHY did you get into that?”

[Read more…] about What is The Importance of Earthing in Electrical Installation?
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