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Recent Posts
- How does one choose the lightning protection class for risk assessment calculation, and how do you calculate radius of striking sphere & lightining current?
- What is omni potential grounding?
- How can you calculate the resistance-to-ground for a ground ring with rods attached?
- Can you explain the 1/20 probe depth rule when conducting a Wenner 4-pin Soil Resistivity Test?
- What is the best probe spacing’s for soil resistivity testing?
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Author Archives: E&S Grounding Solutions Engineering Team
How does one choose the lightning protection class for risk assessment calculation, and how do you calculate radius of striking sphere & lightining current?
Hi Sekar, Thank you for your question regarding lightning protection class, it is our pleasure to help. There are a number of different and varied methods of providing protection from lightning strikes, and the selection of which methods to use … Continue reading
Posted in Lightning & Thunder Storms
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What is omni potential grounding?
Hi Gene, Thank you for your question regarding omni-potential grounding, it is our pleasure to help. We have actually never seen that term in use before. “Omni-” means all or everywhere, so perhaps “omni-potential” means all-voltages? We suspect it just … Continue reading
Posted in Electrical Grounding
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How can you calculate the resistance-to-ground for a ground ring with rods attached?
Hi Brad, Thank you for your question regarding resistance-to-ground calculations, it is our pleasure to help. It sounds like you are trying to conduct hand calculations which is indeed a very limited and frustrating process. It is also highly inaccurate. … Continue reading
Posted in Grounding Electrodes
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Can you explain the 1/20 probe depth rule when conducting a Wenner 4-pin Soil Resistivity Test?
Hi Than and David, Thank you for your question regarding probe depths while conducting a Wenner 4-point soil resistivity test, it is our pleasure to help. Here is some information on Wenner 4-Pin Soil Resistivity Testing: http://www.esgroundingsolutions.com/about-electrical-grounding/what-is-soil-resistivity-testing.php When conducting a … Continue reading
Posted in Grounding Test Methods
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What is the best probe spacing’s for soil resistivity testing?
Hi S. Imtiyaz, Thank you for your question regarding soil resistivity calculations, it is our pleasure to help. It is important to understand that there are two (2) types of resistivity that people use today. The first one is called … Continue reading
Posted in Grounding Test Methods
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What is the best and economical grounding system possible to avoid damages to the electronic equipment (controllers) in the solar field?
Hi Ramkumar, Thank you for your question regarding solar station grounding systems, it is our pleasure to help. Solar stations are power generators that deal with electrical energies every bit as dangerous as that of any other power plant or … Continue reading
How do you reduce the earth resistance of an 18-ohm electrode to under 5-ohms? Can we use GEM or Bentonite Clay as a back-fill?
Hi Niroshan, Thank you for your question regarding the use of back-fill materials to reduce the resistance-to-ground of an earthing electrode, it is our pleasure to help. The two types of back-fill material you mentioned are excellent examples of the … Continue reading
Posted in Grounding Electrodes
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How do you calculate the step and touch voltages in the new substation (13,8/0,48kV)?
Hi Francisco, Thank you for your question regarding the calculation of step and touch voltages in a substation, it is our pleasure to help. Properly calculating step and touch voltages is quite difficult. Here are a few links you should … Continue reading
Posted in Software, Step & Touch Voltage Hazards
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I have ab phase grounded system tied into an existing ground grid. I am installing a new delta- wye solidly grounded transformer. Should the ground loops be tied together? is that safe? Isnt there 480V referenced to another ground form the B phase grounded transformer?
Hi Mike, Thank you for your question regarding ground systems for different voltage transformers, it is our pleasure to help. Yes, the grounding systems not only should be bonded together, but they must be bonded together under the National Electrical … Continue reading
Under what specific conditions is a grounding resistor (NGR) useful, and where its not useful?
Hi Engr, Thank you for your question regarding Neutral Ground Resistors, it is our pleasure to help. The selection of a Neutral Ground Resistor is one of the main choices in deciding what type of electrical system your facility will … Continue reading
Posted in Electrical Grounding, Electrical Wiring
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