Aug 17, 2012 · This poem illustrates the strengths and weaknesses of each — so which type of person are you? And what are you going to do about our environment? Exclusive excerpt from The One Idea That Saves the World: A Call to Conscience and A Call to Action by Laurence Overmire. 7 Types of People Experiment: Imagine he House is on Fire. A Practical Guide To Earth Resistance Testing – Megger (on photo: Four-terminal earth/ground resistance and soil resistivity tester) This may, or may not, be a suitable low resistance path for electric current to protect personnel and equipment. There Are Two Types Of People In The World — Which Kind Are You? Only two. That's it. Two ONLY. Either you are THIS, or you are THAT. Where do you stand?? The lateral earth pressure exerted on the wall when the wall is fixed in position is known as earth pressure at rest. Derivation of Expression for Earth Pressure at Rest : When a material is subjected to three-dimensional (3D) stresses, σ x , σ y and σ z , along the three coordinate axes, x, y, and z, respectively, the strain along the x-axis can be computed from the principles of mechanics of materials as – Test installed grounds without having to disconnect them from the utility supply system. Test any grounding electrode configuration where there is a return path that includes the earth. Test the resistance of a single rod in a series or array. Simultaneously perform a bonding test of the grounding conductor (necessary to complete the return path). DEEP EARTH GROUNDING vs SHALLOW EARTH GROUNDING. by Martin D. Conroy and Paul G. Richard . Computer Power Corporation Omaha, Nebraska . ABSTRACT. Low resistance earth grounding is essential for safety and protection of sensitive electronic equipment. It is the basis for any facility's power quality assurance program.