Book excerpt: The performance of grounding grids is critical in safeguarding electrical systems from damage during fault conditions and lightning strikes. Their effectiveness may be compromised under extreme conditions, leading to system failures or safety incidents. Despite advancements in grounding technologies, there remains a need to evaluate and enhance the performance of grounding grids to withstand these scenarios. Engineers, researchers, and industry stakeholders must collaborate to advance testing methodologies, improve design standards, and develop innovative solutions. Effective research and practical improvements in grounding grid systems will ensure reliable protection is provided to safeguard infrastructure and improve safety. Performance of Grounding Grids at Faulty and Lightning Strokes Conditions presents the characteristics of grounding electrodes when subjected to lightning, including the impacts of soil ionization with frequency, soil resistivity, and permittivity variations. The study presents the effects of different reflection factors on human safety through various methods and simulations. This book covers topics such as fault currents, soil ionization, and grounding systems, and is a useful resource for scientists, engineers, technologists, academicians, researchers, and business owners.