On top of that, measurements to greater depths are more likely to experience different soil resistivity. Big grounding devices common of greater voltage substations normally require much more soil layers, even though smaller temporary substations may see 1 or 2 layers even in additional stratified locations. Thanks for your inquiry. https://collinreoxh.blog2learn.com/80088283/the-5-second-trick-for-soil-electrical-resistivity-bd