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Danish_Khatri
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Earth acts as an electrical ground for the electrical supply that come to our home. But the ground, usually made of cement or stone is not a conductor like metal then how does it acts as an electrical ground.
http://en.wikipedia.org/wiki/Earth_ground"Where a real ground connection has a significant resistance, the approximation of zero potential is no longer valid. Stray voltages or Earth potential rise effects will occur, which may create noise in signals or if large enough will produce an electric shock hazard.
But the ground, usually made of cement or stone is not a conductor like metal then how does it acts as an electrical ground.
Dear could you please make it more detailed. I am a student of science, so it will not be a problem if you make it a little technically detailed.
Danish_Khatri said:Earth acts as an electrical ground for the electrical supply that come to our home. But the ground, usually made of cement or stone is not a conductor like metal then how does it acts as an electrical ground.
"Ground" is widely misunderstood.
This isn't necessarily ture.jim hardy said:An electrical system will operate fine with no connection to "ground" just as it does in a flashlight or airplane.
http://en.wikipedia.org/wiki/Single-wire_earth_return"Single wire Earth return (SWER) or single wire ground return is a single-wire transmission line for supplying single-phase electrical power from an electrical grid to remote areas at low cost. Its distinguishing feature is that the Earth (or sometimes a body of water) is used as the return path for the current, to avoid the need for a second wire (or neutral wire) to act as a return path.
dlgoff said:This isn't necessarily ture.
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By "fail", you mean an open earth?phinds said:So you don't believe that electronics in flashlights and airplanes will always work unless they are connected to Earth ground? I'm being sarcastic, of course, but I'd like an example of when you think it WOULD fail.
dlgoff said:http://en.wikipedia.org/wiki/Earth_ground"
This can be a serious problem for high voltage substations, power plants, or transmission lines. When there's a ground fault (say a transmission line down), the potential of the Earth rises. This is called http://en.wikipedia.org/wiki/Earth_potential_rise" . Depending on the soil conditions the fault can cause a potential difference between the feet of a person standing near an energized ground.
dlgoff said:This isn't necessarily ture.
http://en.wikipedia.org/wiki/Single-wire_earth_return"
dlgoff said:By "fail", you mean an open earth?
Where did I say FAIL. Sure flashlighs will work without a ground. What's the problem?phinds said:No, I mean FAIL, which is what you said it would do. The original statement was "An electrical system will operate fine with no connection to "ground" just as it does in a flashlight or airplane.
Seems to me the opposite of "operate fine" is "fail".
dlgoff said:Where did I say FAIL. Sure flashlighs will work without a ground. What's the problem?
This can be a serious problem for high voltage substations, power plants, or transmission lines. When there's a ground fault (say a transmission line down), the potential of the Earth rises. This is called Ground Potential Rise (GPR). Depending on the soil conditions the fault can cause a potential difference between the feet of a person standing near an energized ground.
For a Single wire Earth return (SWER), if you don't have a ground, you don't have a circuit. What's so hard about that to understand? I'm out of here.phinds said:The original statement was "An electrical system will operate fine with no connection to "ground" just as it does in a flashlight or airplane." and you said that is not necessarily true.
Electrical ground refers to a conductive connection between an electrical circuit and the earth. It serves as a safety feature to prevent electric shock and to provide a path for excess electrical energy to dissipate.
Electrical ground is important for safety reasons. It helps to prevent electric shock by providing a path for excess electrical energy to flow into the ground. It also helps to protect electronic devices from damage caused by power surges.
Electrical ground can be established through a physical connection to the earth, such as a copper rod driven into the ground. It can also be established by connecting to a conductive material, such as a metal water pipe, that is in contact with the earth.
The most common types of electrical ground are earth ground, which uses a physical connection to the earth, and equipment ground, which uses a conductive material to connect to the earth. There are also virtual grounds, which do not involve a physical connection to the earth.
If there is no electrical ground, there is an increased risk of electric shock and damage to electronic devices. Without a ground, excess electrical energy has nowhere to go and can cause fires or harm to individuals. It is important to ensure that all electrical systems have proper grounding to ensure safety and functionality.