Good work...Pisquare, keep doing I have more questions on earth to neautral 1.what is the importance of earth to neutral voltage? How much it need to be? 2. Can we short earth and neutral, if earth to neutral voltage is high(say 10volts)? 3. What is the role of earth pit in above two questions? 4. By Megger if we test the earth pit resistance, how much value it should be? (As per industrical standards) 5. How earth to neutral voltage and earth pit resistance can be related..and what's it's significance? 6. When to do Mantaince for earth pit?
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Good video! Earthing also serves to protect the equipment as earthing cable or path has least resistance and most of the current takes this path and because of this relatively high current, it also trips the breaker (ELCB or RCD) in the process. Is my understanding correct?
Hi sir i am watched your some video, you are teaching so simple way... Sir can you make some videos related topic of transformers. In hindi plz plz plz sir
Thank you Dear Maverick, share this with your friends, Check our other lectures and subscribe to get alerts on new uploads at th-cam.com/users/PiSquareAcademyvideos?sub_confirmation=1 If you have any doubts on this topic, join live interactive session to have a direct interaction with Sekhar sir & get your doubt clarified. Check our fb page for more details facebook.com/bbs.pisquare/
Hi bro, thank you for your explanation, its really help us to understand the basic electrical knowledge, please explain about the insulation resistance test for the electrical panel.. also how to check the earth value practically
Could you please clear these additional doubts: 1) What is resistance of a dry and wet human being. 2) Why is the earthing wire naked? 3) For local earthing why do dig a 6 feet deep hole and then place a Cu plate and add coal and salt and water? What happens if hole is say 2 feet or say 12 feet? 4) What is the difference between earth wire and neutral wire? Both have 0V potential or do they not? How will we differentiate between neural and earth wire if both wires have same colour? 5) What effect does different current values have on a human being? 6) What is responsible for a shock - Current or High voltage ?
anthony gonzalves I would like to clear some of your doubts. The resistance of dry skin is around 100000 ohm and when the skin becomes wet the resistance reduces to around 1000 ohm. Actually both voltage and current are responsible for the electric shock because unless and until there is no voltage there will be no current. When we accidently touch any live wire, current tries to flow through our blood as it contains different ions such as sodium, potassium, etc. which act as a current carrier. Now this current interferes with the functioning of the heart and may lead to Cardiac arrest. The muscles are paralyzed and it becomes difficult to let go.
anthony gonzalves 1 is given 2. Earthing wires could be naked or couldn't be there is no such recommandation because earthing wires r just for body current protection or leakage current protection. 3. The 6 feet deep is just a standard that maintained the only aim is to connect any current source to ground. That's why salt is used to create good conductivity 4. Both theoretically have 0 v but acctually it's not because neutral line comes from the grounding of transformer's star winding's neutral point so that any unbalanced load doesn't affect the transformer or device and earthing wire so due to resistance of wire u see a phase neutral voltage is slightly lower than phase earth voltage. 5. Current acctually mostly responsible for killing because firstly it disturbs the natural flow of sodium and potassium ions in heart and also cause burn from inside. That's why Edison used electric chair for execution so that it would look horrific. 6. Both gives shock but u wouldn't be get killed by moderately high voltages but u could die for a current of 20ma
Mainly 1.During LG or LLG faults if neutral is not grounded then healthy phase voltages will raise to √3 times the regular voltage (which is called arcing ground), to avoid this neutral must be grounded. 2.Due to 3rd harmonics, neutral potential won't be zero (it oscillates), so by grounding the neutral neutral potential will stick to zero.
So isn't the conclusion becomes that earth for an appliance is done to identify the fault (before occuring second earth faulth and cause a deadly short circuit) and electrical shock prevention is a consequence of it?
Hello sir, I request you to clear my doubt that in vehicles,etc., earthing(grounding wire) is given to body which isn't in direct contact with earth (land) as vehicle has got wheels & tyres, but why a person in direct contact with the body doesn't get shocked ?
haii sir I'm Anil kumar. thank u for sharing u r knowldge with us in very easy methods.i Wants to know about MACHINES & SWITCH GEAR PROTECTION, if u did that classes plz share the links sir
hi sir iam santosh ,ur teaching is good to understand ,,i have one doubt sir if we provide earthing to equipment then abnormal currents flow through earth but the people stand on earth but why dont shock to person
you are absolutely correct Mr.Santu, we should get shock, and rather we will get if it is a huge abnormality. Watch this for more and clear details th-cam.com/video/7vAA95ZZdjI/w-d-xo.html
Actually less resistance in earthing as compared to human resistance ...so definitely the abnormal currents flows through ground...if earthing is not good as a chance to the humans get shocked..
Sir teach more basics of electrical engineering which was more useful to us to face interviews,more than interviews which is useful to boost our knowledge
Dear Sir , Here lots of doubt regarding reactive power like why reactive power is necessary for transfer active power? , why capacitor is a source of reactive power and inductor is a sink of reactive power? So please upload video on this!!!
What is the difference between Vrms= 230 V ( sinusoidal or pulse or DC or Stepped) wave? Is there any difference observed if these waves apply to a 230V device? Please explain... Thank you.
Nice video and more knowledgeable.... But tell me about in rainy season when we have erthing in whole house.... But after this seafty some appliance got earth.... Why......
Hai , I have one doubt. I having one generator. I didn't join neutral and earth in generator side. Then I am going to connect a bulb with line and earth in the load side.my question: Is the bulb will burn? Please reply me..... Thankyou
Sir i have dought in dc circits earthing is not provided why ? And wt will happen if DC current grounding,? Give me clarification any hw thanku PHISQARE ,we know lot of things from ur vidious
Hlw sir...nice explanation..but I can't understand one thing that...at the time of rain or thunderstorms we say that over current is flowing to our equipments and thats why they are damaged..but if fuse is employed to protect the equipment ,why that fuse is not able to save the equipment during thunderstorms/rainny seasons...the fuse should blow away when high current flows during that time...but we need earthing to protect our equipments...why this happens sir plz explain..
Sir One doubt i am having, the current ratings of MCB, MCCB, ACB are of 3- Phase or 1- phase: 1) For e.g. i am having a 1200A ACB than its the current carrying capacity of 1-phase or 3-phase ??? 2) My DG rating is 500kVA by calculating current its about 700A than it will be of 3-phase or 1- phase Bit confuse between it because lot of different answer i have got, Knowing that a perfect explanation will be given by you!!!!!!!
hi sir, suppose we give phase directly in body of the device and it connected earth, now if we touch the device what happen does it shock?. please explain me
you won't get shock provided Earthing is proper (as current flows in a least resistance path, human body has around 1k resistance and good earthing resistance will be 1 to 5 ohm)
+Narendra Lolugu - The square root of 3 enters into computations of three phase systems because the trigonometric value of the sine of the phase angle (120 degrees) between phases is equal to [square root 3]/2. The denominator, 2 is factored out when doing the vector/phasor analysis of the voltages and currents in such systems, leaving--by coincidence--the square root of 3. Chalk it up to the craziness of the math. :)
Sure Mr.Haque. Keep following our channel for more updates Please share these videos with your friends, which costs nothing for you but gives us great motivation in doing more such videos. Join our mission in providing free lectures to 1 Million students by sharing these videos.
PiSquare Academy thank you sir,but as you say two pin socket me already earthing safety available hai ,then why three pin plug is available in cooler , heater , washing machine etc
if i prop to v. then we must hav written, i =v/r, but we r writing, v =ir. ies interview qs to me. i said, for simplification purpose, but they dnt seem to be satisfied.
Do more and more videos like this and Ur explanation is very very good sir
Thanks bro for sharing your knowledge to us. Very useful video. We love your way of teaching...
u r teaching is very simple to understand....thanqqq sir
Good work...Pisquare, keep doing
I have more questions on earth to neautral
1.what is the importance of earth to neutral voltage? How much it need to be?
2. Can we short earth and neutral, if earth to neutral voltage is high(say 10volts)?
3. What is the role of earth pit in above two questions?
4. By Megger if we test the earth pit resistance, how much value it should be? (As per industrical standards)
5. How earth to neutral voltage and earth pit resistance can be related..and what's it's significance?
6. When to do Mantaince for earth pit?
Very nice lectures Sir..may god bless you..
Thank you stay tuned to our channel for more such videos, the more you Share these free lectures "more we Upload". For every 100 clicks on share we will upload a new interesting lecture.
Check our other lectures and subscribe to get alerts on new uploads at
th-cam.com/users/PiSquareAcademyvideos?sub_confirmation=1
superb sir, excellent way of explanation
you explanation style is excellent
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Nice one sir...!!
Sir please upload some videos on working of RCCB and ELCB.
Very Nice explanation. Thank you
Sir u r genius..thanks for your coaching
Thank you
I'm shocked by your lecture as these years with wrong notions. Very simple explanation, excellent. I could understand with bare minimum rating.
sir im cse student but impressed by your teachng im very eager to know of d basic conepts of earthing nd fuse
Awesome sir....great job sir plzzzz carry on
Super explanation
Good video! Earthing also serves to protect the equipment as earthing cable or path has least resistance and most of the current takes this path and because of this relatively high current, it also trips the breaker (ELCB or RCD) in the process. Is my understanding correct?
Hi sir i am watched your some video, you are teaching so simple way...
Sir can you make some videos related topic of transformers. In hindi plz plz plz sir
i should have joined your course before getting into ANNA UNIVERSITY......clarity enriched learning!!!
Thank you Dear Maverick, share this with your friends,
Check our other lectures and subscribe to get alerts on new uploads at
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If you have any doubts on this topic, join live interactive session to have a direct interaction with Sekhar sir & get your doubt clarified. Check our fb page for more details facebook.com/bbs.pisquare/
Hi bro, thank you for your explanation, its really help us to understand the basic electrical knowledge, please explain about the insulation resistance test for the electrical panel.. also how to check the earth value practically
Very nice teaching
i strongly understanding for your teachings.sir
Nice explanation
Nice explanation sir. .
Excellent
Waaw very nice sir...
Please make a video on soft starter....
Could you please clear these additional doubts:
1) What is resistance of a dry and wet human being.
2) Why is the earthing wire naked?
3) For local earthing why do dig a 6 feet deep hole and then place a Cu plate and add coal and salt and water? What happens if hole is say 2 feet or say 12 feet?
4) What is the difference between earth wire and neutral wire? Both have 0V potential or do they not? How will we differentiate between neural and earth wire if both wires have same colour?
5) What effect does different current values have on a human being?
6) What is responsible for a shock - Current or High voltage ?
anthony gonzalves
I would like to clear some of your doubts.
The resistance of dry skin is around 100000 ohm and when the skin becomes wet the resistance reduces to around 1000 ohm.
Actually both voltage and current are responsible for the electric shock because unless and until there is no voltage there will be no current. When we accidently touch any live wire, current tries to flow through our blood as it contains different ions such as sodium, potassium, etc. which act as a current carrier. Now this current interferes with the functioning of the heart and may lead to Cardiac arrest. The muscles are paralyzed and it becomes difficult to let go.
anthony gonzalves 1 is given
2. Earthing wires could be naked or couldn't be there is no such recommandation because earthing wires r just for body current protection or leakage current protection.
3. The 6 feet deep is just a standard that maintained the only aim is to connect any current source to ground. That's why salt is used to create good conductivity
4. Both theoretically have 0 v but acctually it's not because neutral line comes from the grounding of transformer's star winding's neutral point so that any unbalanced load doesn't affect the transformer or device and earthing wire so due to resistance of wire u see a phase neutral voltage is slightly lower than phase earth voltage.
5. Current acctually mostly responsible for killing because firstly it disturbs the natural flow of sodium and potassium ions in heart and also cause burn from inside. That's why Edison used electric chair for execution so that it would look horrific.
6. Both gives shock but u wouldn't be get killed by moderately high voltages but u could die for a current of 20ma
Dear Sir
Thank you very much for this channel but if possible to improve sound quality.
Best wishes and regards
So much helpfull
thanks sir.make video about diff b/w efficiency and power factor in machines.how relates to each other in any machines
Very nice teaching and keep it up
one of the thought clearing and simple video to learn from.
nice video sir ..I have a question where do we connect the earth point in our home ..at which location in our homes the earth point is connected
sir i quickly understanding for your teaching very super sir.
i ask the question in why neutral is grounded.
Mainly
1.During LG or LLG faults if neutral is not grounded then healthy phase voltages will raise to √3 times the regular voltage (which is called arcing ground), to avoid this neutral must be grounded.
2.Due to 3rd harmonics, neutral potential won't be zero (it oscillates), so by grounding the neutral neutral potential will stick to zero.
PiSquare Academy
thank you very much sir
So isn't the conclusion becomes that earth for an appliance is done to identify the fault (before occuring second earth faulth and cause a deadly short circuit) and electrical shock prevention is a consequence of it?
Me civil engineer watching electrical enginnering,yet it is interesting 😮
Hello sir, I request you to clear my doubt that in vehicles,etc., earthing(grounding wire) is given to body which isn't in direct contact with earth (land) as vehicle has got wheels & tyres, but why a person in direct contact with the body doesn't get shocked ?
haii sir I'm Anil kumar. thank u for sharing u r knowldge with us in very easy methods.i Wants to know about MACHINES & SWITCH GEAR PROTECTION, if u did that classes plz share the links sir
tooooo good explain sir g...
Brother please make tutorial on PLC programming...
hi sir iam santosh ,ur teaching is good to understand ,,i have one doubt sir if we provide earthing to equipment then abnormal currents flow through earth but the people stand on earth but why dont shock to person
you are absolutely correct Mr.Santu, we should get shock, and rather we will get if it is a huge abnormality.
Watch this for more and clear details th-cam.com/video/7vAA95ZZdjI/w-d-xo.html
It will be like high resistance across short circuit...
Actually less resistance in earthing as compared to human resistance ...so definitely the abnormal currents flows through ground...if earthing is not good as a chance to the humans get shocked..
Super Sir..
Good info.thanks.
thank you so much sir....
Please explain transient Analysis sir ......
Thanks sir
Sir teach more basics of electrical engineering which was more useful to us to face interviews,more than interviews which is useful to boost our knowledge
upload a video of how much current,voltage,power is required to get shock and what is the resistance of human being
Good and informative ....can you please us regarding ELCB AND MCB
Dear Sir ,
Here lots of doubt regarding reactive power like why reactive power is necessary for transfer active power? , why capacitor is a source of reactive power and inductor is a sink of reactive power?
So please upload video on this!!!
Please check this video to get some insight of power factor th-cam.com/video/alQPktkMel0/w-d-xo.html
Super bro
nice video..
Super 👌👌👌👌 sir
Sir I will requested you will do power system analysis and stability it is very difficulty for understanding
Hi brother!! U r explanation is good Brother can upload a video on Difference between earthing & Grounding , neutral
Super sir very good👍👍👍👌👌
Sir please take class about rotor Earth fault productions and setting and Generator protection and settings
Thank you
Sir what is the means of short circuit and what is the result of short circuit
Thank you Sir, why telecoms companies used -48 volts DC.and positive are connected grounding
thank u so much sir, i like ur videos
Hello sir...!
Can u make the lecture on why transformer neutral should be earthed?
What is the difference between Vrms= 230 V ( sinusoidal or pulse or DC or Stepped) wave? Is there any difference observed if these waves apply to a 230V device? Please explain... Thank you.
What is leakage current can u please explain in detail.
thank u sir..
nice sir............
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th-cam.com/users/PiSquareAcademy
Sir please make video on elctrical machines
Nice video and more knowledgeable.... But tell me about in rainy season when we have erthing in whole house.... But after this seafty some appliance got earth.... Why......
i am really sorry dear Yash i didn't get your question clearly. you may call us with your question
Hai ,
I have one doubt. I having one generator. I didn't join neutral and earth in generator side. Then I am going to connect a bulb with line and earth in the load side.my question: Is the bulb will burn?
Please reply me.....
Thankyou
I have one doubt...if the internal winding is in contact with metal body of the machine, we provide earthing.can we consider it as LG Fault????
Sir i have dought in dc circits earthing is not provided why ? And wt will happen if DC current grounding,? Give me clarification any hw thanku PHISQARE ,we know lot of things from ur vidious
Sir plz do video on synchronous motor animation
i recommend to watch mike holt videos on grounding
Hlw sir...nice explanation..but I can't understand one thing that...at the time of rain or thunderstorms we say that over current is flowing to our equipments and thats why they are damaged..but if fuse is employed to protect the equipment ,why that fuse is not able to save the equipment during thunderstorms/rainny seasons...the fuse should blow away when high current flows during that time...but we need earthing to protect our equipments...why this happens sir plz explain..
sir can u tell me the difference between earthing and grounding??
why should we not connect earthing wire to neutral one??
join tomorrow's live session to get instant answer to your question, check our facebook page for more details
What is the difference between earthing, grounding, and neutral point?
Sir if there is an earth fault is there chance of equipment not functioning properly ?
Sir
One doubt i am having, the current ratings of MCB, MCCB, ACB are of 3- Phase or 1- phase:
1) For e.g. i am having a 1200A ACB than its the current carrying capacity of 1-phase or 3-phase ???
2) My DG rating is 500kVA by calculating current its about 700A than it will be of 3-phase or 1- phase
Bit confuse between it because lot of different answer i have got, Knowing that a perfect explanation will be given by you!!!!!!!
sir pls make a video on neutral, earthing.
Hi sir iam durgaprasad I have a one doubt sir can u tall sir
Why lift are used to DC supply ? Why can't use ac supply
Sir, when the appliance gets sorted is it still under the protection of fuse ?
hi sir, suppose we give phase directly in body of the device and it connected earth, now if we touch the device what happen does it shock?. please explain me
you won't get shock provided Earthing is proper (as current flows in a least resistance path, human body has around 1k resistance and good earthing resistance will be 1 to 5 ohm)
what is the difference between neutral and ground
thanks
Sorry for grametical misteks
sir plc ki input output kase chevk krte h ye btaye plzz
how to identify Earth and neutral
Is any thing there group or something else from where we can ask questions sir...??
we will have a live session with Sekhar sir for interaction with students, follow our facebook page for update on live session. Thank you.
thanks Sir
sir why the motors or any loads can't use 2 phase 4 phase or even no?
Yes, we can..
PiSquare Academy then why not we use?
Sir why root 3 is used in 3 phase power calculations. Please explain
+Narendra Lolugu - The square root of 3 enters into computations of three phase systems because the trigonometric value of the sine of the phase angle (120 degrees) between phases is equal to [square root 3]/2. The denominator, 2 is factored out when doing the vector/phasor analysis of the voltages and currents in such systems, leaving--by coincidence--the square root of 3. Chalk it up to the craziness of the math. :)
Sooooper bro
Supeb
I will interact with ur video
Why current flows through least resistance body?
sir pls send psu material and videos
hi ok all ferfact but smaill dote earth guriche chapavu kada body lo nudi ground avuthunadi anavu kada akada ground anadi conductor aa ,kada
Nice bro eanka Telugu lo video s chiyyandi
i want to know what is balance load and what is unbalanced load....
please make a video on this topic ...
good video, very informative, thank you. just try to make the video little shorter.
Sure Mr.Haque. Keep following our channel for more updates
Please share these videos with your friends, which costs nothing for you but gives us great motivation in doing more such videos. Join our mission in providing free lectures to 1 Million students by sharing these videos.
In case no.1 the coil is drawing more current not body of appliance, so it protects coil and there by saving appliance. Am I right ?
you are absolutely correct Mr. Ganapathy
Thanks..spreading knowledge..Good..My best wishes
Sir make a video on why only 3 phase why not 6or 12?
Dear Macharla Anil, join tomorrow's live session for an immediate explanation. Check our fb page for more details
As you say three pin socket is safe then why some device is available in two pin socket
Please check this link to understand this concept: th-cam.com/video/o8UjwKuxFy4/w-d-xo.html at time frame: 3:21
PiSquare Academy thank you sir,but as you say two pin socket me already earthing safety available hai ,then why three pin plug is available in cooler , heater , washing machine etc
when ohms law is I is proportional to V, y we write ohms law as, V=i*r???.. one of my interview Q's.pls help me
'v' is proportional to 'i'..not equal to 'i'.. so in order to remove that proportionality, we add a constant R.
Vignesh Murugan I think he ask about we all know " I is prop to V" ,then why we write "V=IR" not "I=VR"
Hanumanth Rao At constant temperature
if i prop to v. then we must hav written, i =v/r, but we r writing, v =ir.
ies interview qs to me.
i said, for simplification purpose, but they dnt seem to be satisfied.
ohms law:
at constant temperature, voltage across the resistor is directly proportional to current flowing through it. so,
V proportional to I
V=I × R
Please make video on ELCB and RCCB hit likes🙂🙂🙂