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Home ยป Electrical Earthing System Design

Electrical Earthing System Design

12/09/2017 By Ian Leave a Comment

Floating Roof Tank Earthing Strategies – Bypass conductors for lightning

Floating Roof Tank Fire

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

Filed Under: Lightning Protection Design Tagged With: earthing design, Electrical Earthing System Design, Lightning Protection

03/09/2017 By Hugh Leave a Comment

Your Standard Earthing Design – Are They Valid Anymore?

Standard Earthing Design

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?

Filed Under: Earthing System Design Tagged With: BS EN 50522, BS EN 50522-2010, earthing design, earthing standards, Electrical Earthing System Design, HV Earthing, HV Earthing Protection

18/04/2017 By Ian Leave a Comment

Lightning Risk – Looking ahead at future trend

EX zone protection

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). For Example 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

Filed Under: Lightning Protection Design Tagged With: Electrical Earthing System Design, lightning, lightning activity, lightning danger, lightning physics, Lightning Protection, lightning transient studies, risk management, what to do when lightning strikes

23/02/2017 By Ian Leave a Comment

Earthing Calculations for Safe System Design

Earthing calculations

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.

[Read more…] about Earthing Calculations for Safe System Design

Filed Under: Earthing System Design Tagged With: BS7430, CDEGS, earth potential rise, earthing systems, Electrical Earthing System Design, EN 50522, EPR

04/10/2016 By Ian Leave a Comment

BIM Earthing Demystified… Cutting through the endless jargon

BIM earthing?

If like me, you’re a little confused about what BIM REALLY means. This article is for you. It covers some of the misconceptions and demystifies a few uncertainties – without the Governmental jargon!

Let’s start with the basics…

BIM Earthing Demystified…

[Read more…] about BIM Earthing Demystified… Cutting through the endless jargon

Filed Under: Electrical Earthing Tagged With: BIM, BIM Earthing, BS7430, Electrical Earthing System Design

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