What Is An Acceptable Earth Ground Resistance Value, 5 Ohm Or 25 Ohm?
Mohammad asks, In the USA NEC it is stated that the maximum grounding resistance for a house or commercial building shall not exceed 25 ohms... Read More
We Wrote The Book on Grounding and Earthing!
Our managing partner David Stockin is the author of McGraw-Hills NEC 2014
Grounding and Earthing Handbook which fully discusses above-grade wiring issues
and below-grade earthing issues related to electrical grounding.
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Why use one type of grounding electrode instead of another?
Find out now. Downloading our “Grounding Electrodes Explained” White Paper which covers the features and benefits of different grounding electrodes, the importance of soil resistivity testing and more, all in an easy-to-read and understandable manner!
Wenner 4 Point Soil Resistivity Testing
Soil resistivity testing is absolutely essential when it comes to reliable electrical grounding design or determining ground rise potential.
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Cell Site Grounding Requirements
We meet the 5 Ohm resistance to ground requirement to keep your valuable cell site and telecommunications equipment within warranty.
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Grounding System Design
Our comprehensive grounding system design improves reliability, reduces maintenance costs, and reduces downtime.
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Ground Potential Rise Studies
The voltages produced by a Ground Potential Rise event can be hazardous. A Ground Potential Rise Study is the process of automated timed and/or continuous resistance-to ground measurement.
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Electrical Engineering Services
Our Electrical Engineering Services can help you enhance the safety and reliability of your power system including recommendations to mitigate future power system issues.
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Grounding System Evaluations
We provide complete electrical grounding audits which can reduce the probability of injury and lost time and revenue as a result of lightning strikes, AC power ground fault currents and more.
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Ask The Experts Blog
How To Stop Copper Pipe Corrosion With Electrical Grounding
Reid asks, We have a new house that we chose to plumb with copper. The service line from the well to the house is PVC. ... Read More
In What Year Did the NEC Decide the Neutral and Ground Have to be Separated at the Panel?
Karl asks, In what year did the NEC first require that the neutral and ground have to be separated in a sub panel? Hi Karl,... Read More
How to calculate fault current in electrical substation grounding design?
Milan asks, I am trying to understand how to design a substation grounding system and fault current is something I am not getting. For example,... Read More