What is the Sphere of Influence?

What is the Sphere of Influence?

In this episode, E&S Ground Solutions President David Stockin talks about the sphere of influence, which is a scientific theory that estimates the volume of soil utilized by a given earthing / grounding electrode system. The diagonal (maximum) below-grade length of the electrode system is equal to the radius of its sphere-of-influence. Knowing the sphere of influence of a grounding / earthing system is useful for engineers and electricians when trying to improve the resistance...

Jaksot(29)

What is Continuity Testing? (Part 2)

What is Continuity Testing? (Part 2)

In this episode, E&S Grounding Solutions President David Stockin builds upon the previous episode’s discussion on testing the continuity of a grounding system, this time focusing on the clamp-on metho...

9 Kesä 202112min

What is Continuity Testing? (Part 1)

What is Continuity Testing? (Part 1)

In this episode, E&S Grounding Solutions President David Stockin begins a discussion on testing the continuity of a grounding system, focusing on the two-point method. In this method, resistance measu...

25 Touko 202112min

What is Resistance to Ground Measurement? (Part 2)

What is Resistance to Ground Measurement? (Part 2)

In this episode, E&S Grounding Solutions President David Stockin concludes a two-part series on resistance to ground measurements by discussing the induced frequency test, often called the “Clamp-On M...

12 Touko 202113min

What is Resistance to Ground Measurement? (Part 1)

What is Resistance to Ground Measurement? (Part 1)

In this episode, E&S Grounding Solutions President David Stockin sits down to chat about the three-point fall-of-potential method for conducting a resistance to ground measurement. In this method, the...

5 Touko 202112min

What is the 4-Point Soil Resistivity Test? (Part 2)

What is the 4-Point Soil Resistivity Test? (Part 2)

In this episode, E&S Grounding Solutions President David Stockin continues a discussion on the Wenner four-point method for testing soil resistivity. Sounding should occur at least to the extent of th...

20 Huhti 20219min

What is the 4-Point Soil Resistivity Test? (Part 1)

What is the 4-Point Soil Resistivity Test? (Part 1)

In this episode, E&S Grounding Solutions President David Stockin discusses the Wenner four-point method for testing soil resistivity. Selecting proper spacing of the four test probes must be considere...

14 Huhti 20219min

What are the Common Tests for Grounding Systems?

What are the Common Tests for Grounding Systems?

In this episode, E&S Grounding Solutions President David Stockin chats about three tests commonly used to test a grounding system. A four-point test reveals properties about the soil surrounding the g...

6 Huhti 20218min

What is the Difference Between Grounding and Bonding?

What is the Difference Between Grounding and Bonding?

In this episode, E&S Grounding Solutions President David Stockin chats about the difference between ground (earthing) and bonding. OSHA defines grounding as the intentional connection of an object li...

16 Maalis 20219min

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