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Electrical Earthing System Design

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Floating Roof Tank Earthing Strategies – Bypass conductors for lightning

Floating Roof Tank Fires are Common

There are some 15 to 20 known Floating Roof Tank (FRT) fires per year. Floating Roof Tanks are especially vulnerable to the direct and indirect effects of lightning. Direct, or a nearby lightning strike can cause electrical current to flow across the tank shell and roof. When these lightning currents arc across the roof/shell interface, they can ignite any flammable vapours present with devastating effect.

[Read more…] about Floating Roof Tank Earthing Strategies – Bypass conductors for lightning

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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?

[Read more…] about Your Standard Earthing Design – Are They Valid Anymore?

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Lightning Risk – Looking ahead at future trend

Lightning Risk. In a world increasingly driven by quantitative Risk Assessment (QRA) techniques it’s important to understand what the predicted impacts are as a result of our current trajectory (as humans), i.e. the direction of travel that the population of planet earth seems to be following – in terms of climate change:

Increasing Lightning Risk trend

From recent research. Some in the Lightning community are predicting strike frequency increasing by +12% to +24% : the phenomenon appears to be worsening with climate change (2016). [Read more…] about Lightning Risk – Looking ahead at future trend

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Earthing Calculations for Safe System Design

Earthing Calculations regarding your safety – you’re overdue an update!

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

Even though the Earthing Calculations for determining a safe 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 Calculations Design Safety brief.

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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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