There may be others reasons too but the magnitude of this current is in fraction of phase current and in few case it can be even double of phase current. So Neutral wire is always assumed to be charged in active circuit. This neutral wire is given to ground by grounding to make the second terminal of neutral wire at zero potential.
Earth or Ground is for safety concerns against leakage or residual currents on the system via least resistance path. This current is not directly coming from live or phase wire, but is from secondary links which was not in touch with live system in normal condition.
This current is usually much lesser than main line current or phase current and mostly is in order of mA. But this leakage current is good enough to kill someone or may risk fire. Such current are being provided a low resistance path and sent to earth via earth wire.
Because of the difference in application we never mix grounding of neutral and earth. However both are made grounded of-course the process may be different. If both will be mixed then the earth wire which is not supposed to carry any current in normal condition , may have some charges across and will become hazardous.
Good to Know:. There is no difference between Earthing and Grounding but these are the same terms used for Earthing or Grounding. In simple words, Earthing and Grounding are synonyms. A composition in which the bass, consisting of a few bars of independent notes, is continually repeated to a varying melody. Compare fly verb regular and line verb.
To found; to fix or set, as on a foundation, reason, or principle; to furnish a ground for; to fix firmly. To cover with a ground, as a copper plate for etching, or as paper or other materials with a uniform tint as a preparation for ornament. The difference between Earth and Ground When used as nouns , earth means soil, whereas ground means the surface of the earth, as opposed to the sky or water or underground. Earth as a noun uncountable : Soil.
Examples: "This is good earth for growing potatoes. Examples: "She sighed when the plane's wheels finally touched earth. Examples: "Birds are of the sky, not of the earth.
Examples: "synonyms: ground" "That noise is because the amplifier is not properly earthed. Examples: "rfquotek Tickell". Since these devices are usually powered separately, it is inevitable that there will be small differences between their potentials, causing small currents to circulate in order to compensate.
These currents add to the background noise, obscuring low-level detail in music reproduction. A chassis ground refers to the connection that establishes an electrical link to a metallic enclosure. One of the major difference between the grounding and the earthing is that in grounding, the current carrying part is connected to the ground whereas in earthing the non-current carrying parts is connected to ground.
The other differences between them are explained below in the form of the comparison chart. The body of the equipment is connected to ground. Location Between the neutral of the equipment and ground Between the equipment body and earth pit which is placed under the earth surface. Protect the human from electric shock. Application Provide the return path to the current.
It discharges the electrical energy to the earth. For avoiding the electrical shock. Examples Neutral of generator and power transformer is connected to ground.
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