In electrical engineering, ground or earth is the reference point in an electrical circuit from which voltages are measured, a common return path for electric current, or a direct physical connection to the earth. Electrical circuits may be connected to ground (earth) for several reasons.
Earth Ground/Earthing. The error was a silly one on my part where I had the fault go to ground, silly because I should have realized that wasn't what happens since I knew about the ground being connected to the neutral bar in the breaker panel.
As mentioned previously, the ground terminal (earth ground) is physically tied to the chassis, which in turn is connected to the ground wire within the power cord, which is finally connected to the earth via the three prong outlet. A fairly common mistake made by beginners is to connect a load between the positive (+) and the GND terminals. Figure 10. Low-noise ground, or functional earthing (IEEE Std 315-1975 section . 1 and IEC 60417-5018). Figure 11. Safety or protective ground (IEEE Std 315-1975 section . 2 and IEC 60417-5019).
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Earth ground harks back to the practice of using a grounding rod driven into the earth’s surface for safety reasons. A common context for earth ground is in household electrical systems, where current leaves the main circuit panel through a hot wire and flows to receptacles and lights as electricity is consumed (or otherwise diverted through a viable path), and a return path is provided back to the panel through a neutral wire. It is especially important to have earth ground if high voltages are involved. If electrical equipment has a failed component that causes the live voltage to come in contact with a conducting chassis, for example, the equipment may continue to operate due to the internal isolation of systems, but the first person that touches the chassis becomes a path to ground and will suffer serious injury or even death.
ground definition: 1. the surface of the earth: 2. soil: 3. an area of land used for a particular purpose or activity:. B1 the surface of the earth: I sat down on the ground. Cracks had appeared in the dry ground. The plane dived towards the ground and exploded in a ball of flame. A post had been driven into the ground near the tree. The nuclear waste has been entombed in concrete many metres under the ground.