State the methods of Neutral Grounding. State difference between Earthing and grounding.
1 Answer
Answer :
Neutral Grounding connections are of three types:
1. Solid earthing 2. Resistance earthing 3. Reactance earthing
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SR. NO.
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Earthing
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Grounding
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| 1 |
Earthing means connecting the dead part (it means the part which does not carries current under normal condition) to the earth for example electrical equipment’s frames, enclosures, supports etc.
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Grounding means connecting the live part (it means the part which carries current under normal condition) to the earth for example neutral of transformer.
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| 2 |
It is equipment earthing.
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It is source or system earthing.
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| 3 |
Earthing is an alternate low resistance path for leakage current.
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Grounding is a source for unwanted currents and also as a return path for main current for protection of delicate equipments.
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| 4 |
The purpose of earthing is to minimize risk of receiving an electric shock if touching metal parts when a leakage current is present.
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Grounding is done for the protections of power system equipment and to provide an effective return path.
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| 5 |
The purpose of earthing is to minimize risk of receiving an electric shock to human.
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It is provided for eliminating arcing ground and over voltage surge.
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| 6 |
Generally Green wire is used for this as a nomenclature.
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Generally Black wire is used for this as a nomenclature.
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| 7 |
Earthing connections are of four types: Plate earthing Pipe earthing Rod earthing Strip earthing
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Grounding connections are of three types: Solid earthing Resistance earthing Reactance earthing
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| 8 |
It is nothing to do with the system stability.
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It increases stability of the system.
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| 9 |
It does not provide any means for protection system against earth fault.
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This earthing provides suitable means for earth fault protecting system.
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| 10 |
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