https://www.esgrounding.com/knowledge-center/video/kO9UTjJ7qwQ 2021-02-28 https://img.youtube.com/vi/kO9UTjJ7qwQ/hqdefault.jpg What is the Difference Between Grounding and Bonding? E&S Grounding Solutions President David Stockin explains the fundamental difference between grounding and bonding — two concepts that are often confused but serve distinct safety functions in electrical systems. Understanding this distinction is essential for compliance with NEC Article 250 and for designing safe, code-compliant electrical installations. https://www.youtube.com/embed/kO9UTjJ7qwQ https://www.youtube.com/watch?v=kO9UTjJ7qwQ 2021-02-28 yes no https://www.esgrounding.com/knowledge-center/video/LGAXwWVffI8 2021-03-14 https://img.youtube.com/vi/LGAXwWVffI8/hqdefault.jpg What are the Common Tests for Grounding Systems? An overview of the most common field tests used to evaluate grounding system performance, including the fall-of-potential (3-point) method, the 4-point Wenner soil resistivity test, and continuity testing. David Stockin walks through when each test is appropriate and what the results mean for system safety. https://www.youtube.com/embed/LGAXwWVffI8 https://www.youtube.com/watch?v=LGAXwWVffI8 2021-03-14 yes no https://www.esgrounding.com/knowledge-center/video/QEud7aVpiIU 2021-03-31 https://img.youtube.com/vi/QEud7aVpiIU/hqdefault.jpg What is the 4-Point Soil Resistivity Test? (Part 1) Part 1 of a 2-part series on the Wenner 4-point soil resistivity test. David Stockin explains why soil resistivity is the single most important factor in grounding electrode design, how the test is performed in the field, and how the data is interpreted to select the right electrode system for a given site. https://www.youtube.com/embed/QEud7aVpiIU https://www.youtube.com/watch?v=QEud7aVpiIU 2021-03-31 yes no https://www.esgrounding.com/knowledge-center/video/5vMpozi2FI4 2021-04-07 https://img.youtube.com/vi/5vMpozi2FI4/hqdefault.jpg What is the 4-Point Soil Resistivity Test? (Part 2) Part 2 of the Wenner 4-point soil resistivity test series. This episode dives deeper into data analysis, the Sunde method for interpreting layered soil models, and how soil resistivity measurements directly influence the design of ground rod arrays, ground rings, and electrolytic electrode systems. https://www.youtube.com/embed/5vMpozi2FI4 https://www.youtube.com/watch?v=5vMpozi2FI4 2021-04-07 yes no https://www.esgrounding.com/knowledge-center/video/8cRK3RNVygc 2021-04-30 https://img.youtube.com/vi/8cRK3RNVygc/hqdefault.jpg What is Resistance to Ground Measurement? (Part 1) Part 1 of a 2-part series on resistance-to-ground measurement. David Stockin introduces the fall-of-potential (3-point) test method, explains what resistance-to-ground actually measures, and discusses why the commonly cited '5 ohm' or '25 ohm' specifications are often misunderstood and misapplied. https://www.youtube.com/embed/8cRK3RNVygc https://www.youtube.com/watch?v=8cRK3RNVygc 2021-04-30 yes no https://www.esgrounding.com/knowledge-center/video/OukbK-9-Ymk 2021-05-07 https://img.youtube.com/vi/OukbK-9-Ymk/hqdefault.jpg What is Resistance to Ground Measurement? (Part 2) Part 2 of the resistance-to-ground measurement series. This episode covers the Clamp-On test method, the Stakeless test, and the limitations of each approach. David also explains why resistance-to-ground specifications in contracts and standards are frequently problematic and how to address them professionally. https://www.youtube.com/embed/OukbK-9-Ymk https://www.youtube.com/watch?v=OukbK-9-Ymk 2021-05-07 yes no https://www.esgrounding.com/knowledge-center/video/mardZGbIChg 2021-05-19 https://img.youtube.com/vi/mardZGbIChg/hqdefault.jpg What is Continuity Testing? (Part 1) Part 1 of a 2-part series on continuity testing for grounding systems. David Stockin explains what continuity testing measures, why it is required by NEC and IEEE standards, and how to properly perform a continuity test on a grounding electrode system to verify all components are properly bonded. https://www.youtube.com/embed/mardZGbIChg https://www.youtube.com/watch?v=mardZGbIChg 2021-05-19 yes no https://www.esgrounding.com/knowledge-center/video/R6HgEGsWiyE 2021-05-31 https://img.youtube.com/vi/R6HgEGsWiyE/hqdefault.jpg What is Continuity Testing? (Part 2) Part 2 of the continuity testing series. This episode covers advanced continuity testing scenarios including testing of concrete-encased (Ufer) electrodes, ground rings, and bonding conductors. David also discusses common failures found during continuity testing and how to remediate them. https://www.youtube.com/embed/R6HgEGsWiyE https://www.youtube.com/watch?v=R6HgEGsWiyE 2021-05-31 yes no https://www.esgrounding.com/knowledge-center/video/1BsrSVuTYME 2021-06-30 https://img.youtube.com/vi/1BsrSVuTYME/hqdefault.jpg What is the Curse of Resistance to Ground Specifications? One of the most-watched videos on the channel. David Stockin tackles the widespread problem of arbitrary resistance-to-ground specifications — such as '5 ohms' or '1 ohm' — that appear in project specifications without engineering justification. He explains why these numbers are often unachievable, how they drive up project costs, and what engineers should specify instead. https://www.youtube.com/embed/1BsrSVuTYME https://www.youtube.com/watch?v=1BsrSVuTYME 2021-06-30 yes no https://www.esgrounding.com/knowledge-center/video/_zL9cf-CYKA 2021-07-31 https://img.youtube.com/vi/_zL9cf-CYKA/hqdefault.jpg What Happens When Lightning Strikes a Tower? (Part 1) Part 1 of a 2-part series on lightning strike physics. David Stockin walks through the sequence of events that occurs when lightning strikes a communications tower or transmission structure, including the formation of a stepped leader, the return stroke, and the resulting electromagnetic pulse (EMP) that can damage electronic systems throughout a facility. https://www.youtube.com/embed/_zL9cf-CYKA https://www.youtube.com/watch?v=_zL9cf-CYKA 2021-07-31 yes no https://www.esgrounding.com/knowledge-center/video/bh73VvpkAPk 2021-08-31 https://img.youtube.com/vi/bh73VvpkAPk/hqdefault.jpg What Happens When Lightning Strikes a Tower? (Part 2) Part 2 of the lightning strike tower series. This episode focuses on the ground potential rise (GPR) that occurs at the tower base during a strike, the step and touch voltage hazards created for personnel in the vicinity, and the grounding and bonding strategies used to mitigate these dangers. https://www.youtube.com/embed/bh73VvpkAPk https://www.youtube.com/watch?v=bh73VvpkAPk 2021-08-31 yes no https://www.esgrounding.com/knowledge-center/video/zD34LIAoCbE 2021-09-30 https://img.youtube.com/vi/zD34LIAoCbE/hqdefault.jpg What are the Different Electrical Codes? A comparative overview of the major electrical codes and standards that govern grounding and bonding worldwide, including the NEC (NFPA 70), IEEE Std 80, IEEE Std 142 (Green Book), IEC 60364, and NFPA 780. David Stockin explains how these standards differ, where they overlap, and which applies to your specific project type. https://www.youtube.com/embed/zD34LIAoCbE https://www.youtube.com/watch?v=zD34LIAoCbE 2021-09-30 yes no https://www.esgrounding.com/knowledge-center/video/gcuD4KELzJ4 2021-10-31 https://img.youtube.com/vi/gcuD4KELzJ4/hqdefault.jpg When did the IEC Start Requiring Ground Rods? A deep dive into the history of IEC grounding requirements. David Stockin traces the evolution of international grounding standards and explains when and why the IEC began mandating grounding electrodes, how those requirements compare to NEC Article 250, and what this means for engineers working on international projects. https://www.youtube.com/embed/gcuD4KELzJ4 https://www.youtube.com/watch?v=gcuD4KELzJ4 2021-10-31 yes no https://www.esgrounding.com/knowledge-center/video/Xh-JoaId5NQ 2021-11-30 https://img.youtube.com/vi/Xh-JoaId5NQ/hqdefault.jpg What is the Difference Between a Ground Wire and a Neutral Wire? A clear explanation of the difference between the grounding conductor (equipment grounding conductor, or EGC) and the neutral conductor (grounded conductor) in an electrical system. David Stockin explains why these wires look similar but serve completely different functions, and why confusing them can create serious safety hazards. https://www.youtube.com/embed/Xh-JoaId5NQ https://www.youtube.com/watch?v=Xh-JoaId5NQ 2021-11-30 yes no https://www.esgrounding.com/knowledge-center/video/HA0MESJ2Pl8 2021-12-14 https://img.youtube.com/vi/HA0MESJ2Pl8/hqdefault.jpg What are the Grounding Challenges at Solar Farms? Solar farms present unique grounding challenges due to their large footprints, remote locations, and the presence of DC systems alongside AC systems. David Stockin discusses the grounding requirements for utility-scale solar installations, including soil resistivity variability across large sites, the NEC and IEEE requirements for PV systems, and common design mistakes. https://www.youtube.com/embed/HA0MESJ2Pl8 https://www.youtube.com/watch?v=HA0MESJ2Pl8 2021-12-14 yes no https://www.esgrounding.com/knowledge-center/video/xOm7QCYwrxk 2022-03-31 https://img.youtube.com/vi/xOm7QCYwrxk/hqdefault.jpg What are the Top 3 Things the NEC Needs to Change? David Stockin shares his professional perspective on the three most important changes needed in NEC Article 250 to better protect electrical workers and equipment. This episode draws on decades of field experience and highlights areas where current code language creates confusion, inconsistency, or inadequate protection. https://www.youtube.com/embed/xOm7QCYwrxk https://www.youtube.com/watch?v=xOm7QCYwrxk 2022-03-31 yes no https://www.esgrounding.com/knowledge-center/video/2lW-Rh-8V6A 2022-04-30 https://img.youtube.com/vi/2lW-Rh-8V6A/hqdefault.jpg Why is it important to address grounding systems before you begin a new project? Grounding is often treated as an afterthought in project design — and that mistake can be extremely costly. David Stockin explains why grounding system design must be addressed during the early design phase, how late-stage grounding discoveries drive up costs and cause schedule delays, and what questions engineers should be asking at project kickoff. https://www.youtube.com/embed/2lW-Rh-8V6A https://www.youtube.com/watch?v=2lW-Rh-8V6A 2022-04-30 yes no https://www.esgrounding.com/knowledge-center/video/WrvUc5bh-LQ 2022-05-31 https://img.youtube.com/vi/WrvUc5bh-LQ/hqdefault.jpg How can Step Voltage Accidents be Prevented? Step voltages — large differences in electrical potential across a short distance on the ground surface — are a leading cause of electrocution deaths during lightning storms and near downed power lines. David Stockin explains the physics of step voltage, how it kills, and the grounding and equipotential bonding strategies that can prevent these tragedies. https://www.youtube.com/embed/WrvUc5bh-LQ https://www.youtube.com/watch?v=WrvUc5bh-LQ 2022-05-31 yes no https://www.esgrounding.com/knowledge-center/video/NAaOcTGJohs 2022-06-30 https://img.youtube.com/vi/NAaOcTGJohs/hqdefault.jpg What are Ground Loops? Ground loops are one of the most misunderstood concepts in electrical engineering. David Stockin clarifies the difference between a ground 'loop' and a ground 'ring', explains why objectionable currents (as defined by NEC 250.6) are dangerous to both personnel and equipment, and describes the proper methods for eliminating ground loops from electrical systems. https://www.youtube.com/embed/NAaOcTGJohs https://www.youtube.com/watch?v=NAaOcTGJohs 2022-06-30 yes no https://www.esgrounding.com/knowledge-center/video/K6Mq-eU7ETg 2022-08-31 https://img.youtube.com/vi/K6Mq-eU7ETg/hqdefault.jpg What are 4 Lightning Scenarios that Cause Problems? Part 1 Part 1 of a 5-part series on lightning damage scenarios. David Stockin introduces the four most common ways lightning causes damage to structures and electrical systems: air-to-air (cloud-to-cloud) strikes, nearby ground strikes, strikes to incoming power lines, and direct strikes to the building. This episode focuses on air-to-air strikes and the electromagnetic field (EMF) damage they cause. https://www.youtube.com/embed/K6Mq-eU7ETg https://www.youtube.com/watch?v=K6Mq-eU7ETg 2022-08-31 yes no https://www.esgrounding.com/knowledge-center/video/cRBPuX6gVfc 2022-09-30 https://img.youtube.com/vi/cRBPuX6gVfc/hqdefault.jpg What are 4 Lightning Scenarios that Cause Problems? Part 2 Part 2 of the lightning damage scenarios series. This episode covers nearby ground strikes — the second most common source of lightning damage — and explains how ground currents traveling through the earth can couple into concrete-encased steel structures, inducing magnetic fields that damage sensitive electronic equipment. https://www.youtube.com/embed/cRBPuX6gVfc https://www.youtube.com/watch?v=cRBPuX6gVfc 2022-09-30 yes no https://www.esgrounding.com/knowledge-center/video/HbvpbPsxqtU 2022-10-14 https://img.youtube.com/vi/HbvpbPsxqtU/hqdefault.jpg What are Four Lightning Scenarios that Cause Problems? Part 3 Part 3 of the lightning damage scenarios series. David Stockin continues the discussion of ground strikes and their effects on building structures, focusing on how the induced magnetic fields interact with electronic systems and what grounding and shielding strategies can be used to mitigate the damage. https://www.youtube.com/embed/HbvpbPsxqtU https://www.youtube.com/watch?v=HbvpbPsxqtU 2022-10-14 yes no https://www.esgrounding.com/knowledge-center/video/Hf6UTpCYdPg 2022-11-30 https://img.youtube.com/vi/Hf6UTpCYdPg/hqdefault.jpg What are Four Lightning Scenarios that Cause Problems? Part 4 Part 4 of the lightning damage scenarios series. This episode covers direct lightning strikes to buildings — the least common but most destructive scenario. David explains the physics of a direct strike, the role of Franklin-style lightning rods in protecting structures, and how the building grounding system must be designed to safely dissipate the enormous strike current. https://www.youtube.com/embed/Hf6UTpCYdPg https://www.youtube.com/watch?v=Hf6UTpCYdPg 2022-11-30 yes no https://www.esgrounding.com/knowledge-center/video/zFyXX8HEeNQ 2022-12-14 https://img.youtube.com/vi/zFyXX8HEeNQ/hqdefault.jpg What are Four Lightning Scenarios that Cause Problems? Part 5 The concluding episode of the 5-part lightning damage scenarios series. David Stockin brings together all four lightning scenarios and presents a comprehensive lightning protection strategy, including Franklin-style lightning protection systems, ground rings, surge protection devices (SPDs), and cascaded SPD systems that work together to protect a facility from all lightning damage modes. https://www.youtube.com/embed/zFyXX8HEeNQ https://www.youtube.com/watch?v=zFyXX8HEeNQ 2022-12-14 yes no https://www.esgrounding.com/knowledge-center/video/OCP8jGYolwg 2024-07-31 https://img.youtube.com/vi/OCP8jGYolwg/hqdefault.jpg E&S Grounding Solutions — Company Overview A comprehensive overview of E&S Grounding Solutions, Inc. — the world standard in electrical grounding engineering. This presentation covers the company's history, mission, core services (grounding system design, soil resistivity testing, ground resistance testing, lightning protection design), and the industries served, including data centers, substations, telecommunications, military, and industrial facilities. https://www.youtube.com/embed/OCP8jGYolwg https://www.youtube.com/watch?v=OCP8jGYolwg 2024-07-31 yes no https://www.esgrounding.com/knowledge-center/video/cTh3zCW43Aw 2024-09-30 https://img.youtube.com/vi/cTh3zCW43Aw/hqdefault.jpg A Critical Review of Lightning Protection Systems: Science, Standards, and Safety A rigorous technical review of lightning protection system (LPS) design, covering the science behind lightning attachment, the rolling sphere method, protection angle method, and mesh method as defined in NFPA 780 and IEC 62305. David Stockin evaluates the effectiveness of different LPS configurations and discusses common design errors that leave facilities inadequately protected. https://www.youtube.com/embed/cTh3zCW43Aw https://www.youtube.com/watch?v=cTh3zCW43Aw 2024-09-30 yes no https://www.esgrounding.com/knowledge-center/video/mnwk2vvKtl0 2024-10-14 https://img.youtube.com/vi/mnwk2vvKtl0/hqdefault.jpg The Grandfathering Myth A myth-busting episode addressing the widespread misconception that existing electrical systems are 'grandfathered' and do not need to meet current NEC or safety standards. David Stockin explains when the grandfathering doctrine actually applies, when it does not, and why relying on grandfathering can expose facility owners and engineers to serious liability. https://www.youtube.com/embed/mnwk2vvKtl0 https://www.youtube.com/watch?v=mnwk2vvKtl0 2024-10-14 yes no https://www.esgrounding.com/knowledge-center/video/qj-sit51hUQ 2024-10-31 https://img.youtube.com/vi/qj-sit51hUQ/hqdefault.jpg A Review of NFPA 70B: Electrical Grounding and Lightning Protection Maintenance Requirements A detailed review of NFPA 70B (Recommended Practice for Electrical Equipment Maintenance) as it applies to grounding and lightning protection systems. David Stockin covers the inspection and testing intervals required by NFPA 70B, what maintenance activities are recommended, and how a proper maintenance program can prevent costly failures and ensure ongoing code compliance. https://www.youtube.com/embed/qj-sit51hUQ https://www.youtube.com/watch?v=qj-sit51hUQ 2024-10-31 yes no