The Main difference between Neutral, Ground and Earth?
To understand the difference between Neutral, Ground and Earth, we must understand the need of these things first.
Neutral is the return path for electric current in an electric circuit which is supposed to carry current in normal condition. This current may be because of many reasons, primarily because of phase current imbalance and sometimes because of 3rd and 5th harmonics.
There may be other reasons too but the magnitude of this current is in fraction of phase current and in few cases it can be even double of phase current. So Neutral wire is always assumed to be charged (in active circuit). This neutral wire is connected to the ground (by grounding as in a domestic power supply the Ground is bonded to Neutral, to provide a return path to the transformer at the sub-station) to make the second terminal of neutral wire at zero potential.
- Related Post: Why Earth Pin is Thicker and Longer in a 3-Pin Plug?
Earth or Ground
Earth or Ground is for safety concerns against leakage or residual currents on the system via least resistance path. While Phase and Neutral is connected to the main power wiring, earth may be connected to the body of equipment or to any system which in normal condition doesn’t carry current but in case of some insulation failure, is supposed to carry some minor current.
This current is not directly coming from Live or Phase (Line or Hot) wire, but is from secondary links which were not in touch with the live system in normal condition. This current is usually much lesser than the main Line current or Phase current and mostly is in order of mA. But this leakage current is good enough to kill someone (electrocution) or may risk fire with serious damages. Such current is being provided a low resistance path and sent to earth via earth wire.
Because of the difference in application we never mix the grounding of Neutral and Earth. However both are 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.
There is no difference between Earthing and Grounding but these are the same terms used for Earthing or Grounding. Grounding (also known as Bonding) is the common word used for earthing in the North American standards like IEEE, NEC, ANSI and UL etc. while, Earthing is used in European, Common wealth countries and Britain standards like IS and IEC etc. In simple words, Earthing and Grounding are synonyms. Both are similar words used for the same thing
Difference between Earthing and Grounding.
There is no difference between Earthing and Grounding but these are the same terms used for Earthing or Grounding.
Grounding (also known as Bonding) is the common word used for earthing in the North American standards like IEEE, NEC, ANSI and UL etc. while, Earthing is used in European, Common wealth countries and Britain standards like IS and IEC etc.
In simple words, Earthing and Grounding are synonyms. Both are similar words used for the same thing
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