Minimum Electrical Clearance.
Minimum Electrical Clearance As Per BS:162.
| INDOOR |
| Voltage in KV |
Phase to earth in mm |
Phase to phase in mm |
| 0.415 |
15.8 |
19.05 |
| 0.600 |
19.05 |
19.05 |
| 3.3 |
50.8 |
50.8 |
| 6.6 |
63.5 |
88.9 |
| 11 |
76.2 |
127.0 |
| 15 |
101.6 |
165.1 |
| 22 |
139.7 |
241.3 |
| 33 |
222.25 |
355.6 |
Minimum Electrical Clearance As Per BS:162.
| OUTDOOR |
| Voltage in KV |
Phase to earth in mm |
Phase to phase in mm |
| 6.6 |
139.7 |
177.8 |
| 11 |
177.8 |
228.6 |
| 22 |
279.4 |
330.2 |
| 33 |
381 |
431.8 |
| 66 |
685.8 |
787.4 |
| 110 |
863.6 |
990.6 |
| 132 |
1066.8 |
1219.2 |
| 220 |
1778 |
2057.4 |
Minimum Working Clearance:
| OUTDOOR SWITCHYARD |
| Voltage in KV |
To ground in mm |
Between section(mm) |
| 11 |
2750 |
2500 |
| 33 |
3700 |
2800 |
| 66 |
4000 |
3000 |
| 132 |
4600 |
3500 |
| 220 |
5500 |
4500 |
Minimum Ground Clearance As Per IE-1956(Rule 77)
| Voltage in KV |
To ground in mm |
| 132 |
6.10 |
| 220 |
7.00 |
| 400 |
8.84 |
| 800 |
12.40 |
| |
|
Minimum Clearance between Lines Crossing Each Other (IE-1957)
| System Voltage |
132KV |
220KV |
400KV |
800KV |
| Low & Medium |
3.05 |
4.58 |
5.49 |
7.94 |
| 11-66KV |
3.05 |
4.58 |
5.49 |
7.94 |
| 132KV |
3.05 |
4.58 |
5.49 |
7.94 |
| 220KV |
4.58 |
4.58 |
5.49 |
7.94 |
| 400KV |
5.49 |
5.49 |
5.49 |
7.94 |
| 800KV |
7.94 |
7.94 |
7.94 |
7.94 |
Minimum Height above Railway As Per IE-1957
| Voltage |
Broad Meter & Narrow Gauges |
| Above 66KV up to 132KV |
14.60 Meter |
| Above 132KV up to 220KV |
15.40 Meter |
| Above 220KV up to 400KV |
17.90 Meter |
| Above 400KV up to 500KV |
19.30 Meter |
| Above 500KV up to 800KV |
23.40 Meter |
Various Air clearances to be provided as per IE rule 64
| Voltage KV |
33KV |
66KV |
110KV |
220KV |
400KV |
| BIL (Kvp) |
170 |
325 |
550 |
1050 |
1425 |
| P-E (cm) |
30 |
63 |
115 |
240 |
350 |
| P-P(cm) |
40 |
75 |
135 |
210 |
410 |
| P-G (Meter) |
3.7 |
4.0 |
4.6 |
5.5 |
8.0 |
| Section Clearance(Mt) |
2.8 |
3.0 |
3.5 |
4.3 |
6.5 |
Clearances from Buildings of HT and EHT voltage lines IE Rule 80
| Vertical Distance |
| High voltage lines up to 33KV |
3.7 Meter |
| Extra High Voltage |
3.7 Meter + Add 0.3 meter for every additional 33KV |
| Horizontal clearance between the conductor and Building |
| High Voltage Up to 11 KV |
1.2 Meter |
| 11KV To 33KV |
2.0 Meter |
| Extra High Voltage |
2.0 Meter + Add 0.3 meter for every additional 33KV |
Clearance above ground of the lowest conductor As per IE Rule 77
| Over head Line Across Street |
| Low and Medium Voltage |
5.8 Meter |
| High Voltage |
6.1 Meter |
| Over head Line Along Street (Parallel To Street) |
| Low and Medium Voltage |
5.5 Meter |
| High Voltage |
5.8 Meter |
| Over head Line Without Across or Along Street |
| Low/Medium /HT line up to 11KV If Bare Conductor |
4.6 Meter |
| Low/Medium /HT line up to 11KV If Insulated Conductor |
4.0 Meter |
| Above 11 KV Line |
5.2 Meter |
| Above 33KV Line |
5.8 Meter + Add 0.3 meter for every additional 33KV |
Clearance between conductors and Trolley / Tram wires (IE Rule 78)
| Low and Medium Voltage |
1.2 Meter |
| High Voltage Line Up to 11KV |
1.8 Meter |
| High Voltage Line Above to 11KV |
2.5 Meter |
| Extra High Voltage Line |
3.0 Meter |
| |
|
Clearances from Buildings of low & medium voltage lines(IE Rule 79 )
| For Flat roof, Open Balcony, Verandah Roof and lean to Roof |
| Line Passes Over Building Vertical Clearance |
2.5 Meter |
| Line Passes Adjustment of Building Horizontal Clearance |
1.2 Meter |
| For pitched Roof |
| Line Passes Over Building Vertical Clearance |
2.5 Meter |
| Line Passes Adjustment of Building Horizontal Clearance |
1.2 Meter |
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About Jignesh.Parmar (B.E,Mtech,MIE,FIE,CEng)
Jignesh Parmar has completed M.Tech (Power System Control), B.E(Electrical). He is member of Institution of Engineers (MIE) and CEng,India. Membership No:M-1473586.He has more than 16 years experience in Transmission -Distribution-Electrical Energy theft detection-Electrical Maintenance-Electrical Projects (Planning-Designing-Technical Review-coordination -Execution). He is Presently associate with one of the leading business group as a Deputy Manager at Ahmedabad,India. He has published numbers of Technical Articles in “Electrical Mirror”, “Electrical India”, “Lighting India”,”Smart Energy”, “Industrial Electrix”(Australian Power Publications) Magazines. He is Freelancer Programmer of Advance Excel and design useful Excel base Electrical Programs as per IS, NEC, IEC,IEEE codes. He is Technical Blogger and Familiar with English, Hindi, Gujarati, French languages. He wants to Share his experience & Knowledge and help technical enthusiasts to find suitable solutions and updating themselves on various Engineering Topics.
Jignesh.Parmar (B.E,Mtech,MIE,FIE,CEng)
There seems to be an inadvertent error (probably typing error)Under the heading
“Minimum Ground Clearance As Per IE-1957 (Rule 77)”, the heights are given in mm
Kindly correct the same
Jignesh sir,
Can you pl. explain, what should be the height of foundation of Indoor transformer (22KV, 1 MVA) from ground. Which standard do we refer for that???
i m Electrical Engineer with 2 year of experiance in grid construction and transmission. can u please suggest me some Electrical handbooks
Hai sir. can u please tell me what is the clearence between two phases in a 11KV indoor substation panel.
Hai sir.
can u please tell me what will be the clearence between phase to phases of 11 kv line & 220 line as when new 11 kv line to be erected /passed just below at mid point tower of 220 kv line
Regards,
Hari Vallavah
Mail ID hari.v.sharma @gmail.com
Please refer Indian Electricity Rule abstract
https://electricalnotes.wordpress.com/2011/04/22/minimum-electrical-clearance-2/
Minimum Clearance between Lines Crossing Each Other As Per IE-1957 Rules
System Voltage 132KV 220KV 400KV 800KV
Low & Medium 3.05 4.58 5.49 7.94
11-66KV 3.05 4.58 5.49 7.94
132KV 3.05 4.58 5.49 7.94
220KV 4.58 4.58 5.49 7.94
400KV 5.49 5.49 5.49 7.94
800KV 7.94 7.94 7.94 7.94
Dear Mr. Jignesh,
Can you give detail of What is the minimum P-E clearance between conductor(Jumper) to IPS tube in air for voltage 420 KV as per different standard ?
P-E when IPS Eathed
P-P when conductor & IPS tube both charged.
Regards,
Sanjay Bhalodiya
Sir Could you please tell me whether partition wall between HT & LT panel is required ?IF no please send me the IS codes or any relevant documents
WHAT IS THE DISTANCE BETWEEN THE 33KV LINE POLES?ANY IE Rule?
what will be clearence between 11 kv parrel line
Already given in blog..in Safety clearance Post………………
Jignesh Sir,
i have a questiuon. IS 110 KV overhead new line allowed in city corporation residential area as the house comes under it in mangalore, karnataka ?
Can you please confirm me the minimum clearance required for crossing national highway with 400 KV overhead transmission line.
Awaiting your reply.
Clearence between 11Kv & 220Kv when crossing is 4.58 Mtr
Empty Drum to be removed from transformer area.
is it comes the Indian electricity rule -64 ?
Safety inspector has given the command to remove the empty oil drums from transformer yard.
is it ok as per ie rule – 64 ???
IE-64
(iv) State in case of transformers or switches or static condensers involving the use of more than 2,275 litres of oil in one chamber, if suitable oil soak pits are provided.
(v) Where 9,000 litres or more of oil is used in any one oil tank, has provision been made for draining away or removal of oil which may leak or escape from such tank(s)?
9000 liters of oil in any one oil tank, receptacle or chamber is involved,provision shall be made for the draining away or removal of any oil which may leak
or escape from the tanks receptacles or chambers containing the same, special precautions shall be taken to prevent the spread of any fire resulting from the
ignition of the oil from any cause and adequate provision shall be made for extinguishing any fire which may occur. Spare oil shall not be stored in an such
sub-station or switch station.
There is no any indication for Empty Barrel. If The Authorized person said to remove barrel as a safety view than it is understood.Please follow one Golden Rule Do not argue the Person who have authority so follow Instruction of authorized person to sort out issue.
Hi sir,
I am working in BHEL as a electrical engineer . Can you please tell me what is the minimum clearance required between 33 KV underground power cable and GAIL gas pipeline. kindly reply me soon with some evident documents .
Matter Urgent
Pradeep Kumar yadav
As Per QUATAR GENERAL ELECTRICITY CORPORATION
2.3 Telephone, Water, Sewerage & Gas Services
The service facilities for telephone, water, sewerage, gas, etc. shall not be permitted to be laid within the cable reservations. The following minimum clearances shall be
observed for respective service lines at crossing points. Such crossings may not be permitted if the cable’s rating / integrity will be affected in any way by the services to
cross the cable reserve.
Service/Utility Vertical clearance (Minimum)
Water & TSE Mains (to crossbelow EHV cable level) 500 mm
Water distribution lines 200 mm above cable protective tile Sewerage Mains (to cross below EHV cable level)=
1000 mm
Drainage= 500 mm below the cable or
200 mm above the cable protective tile
Gas pipes= 600 mm
Telephone lines =200 mm above the cable protective tile
LV / 11kV cables 150 150 mm above the cable protective tile
sir,
In my case the GAIL Gas line is approximately 1000mm below the ground and I am planning to keep power cable 500mm inside PVC conduit below the Gas pipeline, I am unable to execute it due to lack of supporting document, can you please suggest me any source for this.
Pradeep Kumar Yadav
As per IS 1255
Clearances — The desired minimum clearances are as follows:
Power cable to power cable Clearance not necessary;
however, larger the
clearance, better would be
current carrying capacity
Power cable to control cables : 0.2 m
Power cable to communication cable : 0.3 m
Power cable to gas/water main : 0.3 m
As per The Iranian Petroleum Standards (IPS)-160
FOR 400/230 volt.
Minimum vertical distance between power cables and gas pipelines in intersections.
TABLE 3
VOLTAGE MINIMUM DISTANCE METERS
380/220 volt 0.5
20 kilo volt 1
63 kilo volt 1.5
Water pipeline to be 500mm from an 11kv MV cable?
Is this assumption correct?
Can you please advise?
Regards
Henri Botha
Electrical Superintendant
Ulan West Mines Australia
my learned sir,
i am not an electrical engineer but as an internal auditor i have to deal with them,here in pakistan.
we installed static meters on connection above 5kw,especially CNG connection escaping by paying penalty against LPF,how ever the kvarh showing,consumer using ground earth system. notices issued to consumer for improving pf but in vain, do i proceed further if u agree. thank you
I have a 500kva generator supply a 53km 33kV line with over 8 transformers along differents points of the load centres. th line is built soundly but has a problem of tripping the generator everytime. i have been told it’s a problem of capacitance build up. can you kindly explain what could be the problem with this line
antony
can 150kVa transformer supply a 23km 33kv line? if yes after how long should the conductors be transposed
How maney minimum vertical clearance should be adopted for highway construction under power line 400 kv.
Please refer Electrical Notes of This Blog..
Kindly give the BS-162 equivalent IS Standard code for busbar clearance on indoor panel.
can a portion(300mtr span) of 400kV HT overhead line be replaced with underground cable on the outskirts of mumbai. What would be the cost and time for completion of 300mtr span. Please coment
How to decide the busbar size & how to decide the electrical clearences between phase to phase ,phase to earth?
What is the exact difference between precision & accuracy?
i am a petrol pump owner wants to know about the minimum distance from over head high tension line (11-33kva) from a petrol pump licence area.
Hi sir iam working in 33.2 mv substation. Here in daily 5 to 6 a day voltage fluctuavatio (under voltage, over voltage) i want to know what is the resens behind that fault.
inew petrol pump wants to know about the minimum distance from over head high tension line (11-33kva) from a petrol pump licence area.
i need clarification, minimum distance from Transformer HT side to fencing
sir
my name is vikas working as surveyor in aptransco.
sir i can do towerspotting manually .can i have any indian software for the tower spotting .please refer
sir,
i’m gajendiran working as Electrical engineer in L&T.
minimum clearance between 22KV HT cable & LT ,LV cable in UG system
Please refer Abstract of CPWD and IS code of this Blog
Hi sir,
Could you please tell me the minimum space required around an indoor substation(33/415v) so as to attain fire safety requirements?…
pls refer any book for substation design. I want Know details of SAS also.
Hi,
I am interested to buy an apartment near electrical transmission line (it looks like very very high power line).
Builder has maintained distance from centre line of powerline to building at 75 meters..
Is there any health hazard involved in living near high tension line?
Please tell me what will be clear horizontal and vertical distance between 110kv line and building, as i am comming up with resdiantial building beside 110kv line in karnataka. as per KEB SR
why we have maintain phase to phase clearance? if we did’t maintain the clearance…what will happen?
Meganathan.A
R u Electrical engineer !!!
y upper & lower lips have some gap for eating
ph to ph clearance to aviod short circuit of phase to phase
For obvious reasons.
But there are indicated minimun values.
The real minimun I believe should be checked against line reactance and other parameters, as there may be for example loses due to these factors.
(btw: i am not electrical, i am civil. Sorry for my comments, may be unaccurate or wrong)
Hi Friends , Need ur advice ……..
What should be the minimum vertical clearance between 11 KV HT ABC(3*35+75 sq mm) and 415 LT ABC(2*16+25 sq mm) . Both the cables are crossing at one point ( Used for overhead distribution system)
Thanx in advance
Waiting for response
Manoj Arora
As Per IE Rules:
Low/Medium Crossing to 11KV to 66KV= 3.05 Meter
But i think it is for bare conductor , i need to know about cable (Both are cable)
waiting for advice
Power cable to power cable Clearance not necessary;
however, larger the clearance current carrying capacity would be better
didnt get you sir .
just wanted to know about this particular case:
11 KV HT ABC used for 10KVA Distribution Transformer , Further 415 V LT ABC for laying LT Lines
Hi could you share What does the IEC mentions about the clearanace between phase to ground and phase to phase ,For the variuos voltage levels?
We are going to installing in 11kv/420 transformer opencast mine in one shed.what is safe distance for installing control panels and starters? what are safety we have to follow /
what is the minimum ground clearance required for a low tension aerial bunched cable line?
Dear Jignesh please correct the reference of Indian Electricity Rules as IE Rules 1956 instead of 57. Besides Central Electricity Authority Regulations Measures relating to Safety and Electric Supply 2010 have replaced IE Rules. Refer Govt of India Notification dated 24 September 2010.
Thanks for highlighting Typing ERROR.
I had also mentioned IE Rules have been replaced with the regulations as, safety measures for Generation Transmission Distribution and Use of Electrical Power have so far been regulated by Indian Electricity Rules 1956 and as amended time to time. These Rules were made as per the Section 37 of Indian Electricity Act 1910 by Central Electricity Board. After enactment of Electricity Act 2003, the Indian Electricity Act 1910 stood repealed as per Section 185 of EA 2003. However the savings from the same section clause (2) (c) states that:
“the Indian Electricity Rules, 1956 made under section 37 of the Indian Electricity Act, 1910 (9 of 1910) as it stood before repeal shall continue to be in force till the regulation under section 53 of this Act are made”
As per the powers conferred to Central Electricity Authority (CEA), by section 177 clause (2) (b) read with section 53 of Electricity Act 2003, stating to provide ‘suitable measures relating to safety and electric supply’notified Regulations were published on website of CEA. Its date of publish in Gazette of India is 24th September 2010.
Dear Completely Agree with You. But Still Lots of Engineer confused between IE Act and IE Rule and it’s revision (Further Grid Code,supply code,GERC for gujarat).I have also faced a problem in one Interview in Power distribution company. I could not succeed to explain interviewer about IE Rule and IE Act. Interviewer himself was confused between IE Rules and IE act.By the way thanks for explained it deeply.
for clearance between underground electrical cable and other utility service like gas, water, sewage pipe lines is there any reference in IEC or IEEE
please send me notes regarding testing,commisioning,operation & maintenance of electrical equipments for132 kv s/s
Dear Jignesh
Could you please tell me the minimum clearance of 400 KV line from building, so that the electronics equipements like communication panels, SCADA panels etc. will not be effected from electomagnetic induction.
Thanking you
Santosh Behera
As per IE Rules & CPWD Noms:
Horizontal Clearance of HT Line from Building is 2 Meter for 33KV and Add 0.3 Meter for Next each 33KV So for 440KV
It is 5.9 Meter.
hi ,
sir i am satyam want to know about all ie rules in internet ….plz help me….i am not belongs to elect. engg.
Hi Mr. Jignesh Parmer,
I intend to purchase an apartment near a 40 feet HT line (voltage unknown, probably 33kV), which is located 7 meters away from the building. Is it safe to buy the house? What are the ill effects of having HT line near residential house? Could you please advise?
Thank you In advance
sir, what sould be the min. distance between new petrol pump and 11kv line in national highway
what is the minimum clearance between 100 mm water pipe and 11kv cable
Julian
sir.
Two lines ( one 400 Kv and other 200 KV) are parallel to each other, is any criteria for Maritain minimum distance between two Parallel line.
Please Refer Abstract of IE rules and CPWD of this Blog.
HI ,
Sir, MY QUERY REGARDING 22KV LINE , LINE START FROM RECEIVING STATION AFTER 22 KV GANTRY A TAKE OFF STRUCTURE IS ERECTED.
can we have a 22 KV , 300 amp drop out out door fuse for 3 phase 20 kv line , fault level is 16 KA.
i am working on project 20 kv line d/c where i have to install 300 amp out door drop out fuse on Take off structure.
SIR,
FOR 22 KV FEEDING D/C OVER HEAD LINE WHAT SHOULD BE THE CLEARANCE FROM GROUND , PHASE TO PHASE AND PHASE TO EARTH
SIR PLEASE LET ME KNOW THE GROUND CLEARENS OF 66KV LANE PASSING ABOVE THE STREET AND THE CONSTRUCTION DISTANCE (GROUND CLEAREANS ETC)
It is already given On Blog…Just Read Abstract of IE Rule and CPWD.
Dear Sir,
Kindly let us inform that, what is the minimum clearance to be maintained between wall & the transformer body. ( Note: Transformer Rating : 33 KV, 15 MVA)
Hai sir please tell what is the minimum clearence between 11 kv HT line & 415 v LT line at the crossing.
Refer Abstract of IE Rules and CPWD of this Blog..
Sir, can u please tell me is there any EMF (Electro Magnetic Field) norms in India to be followed for erecting 33 KV overhead line, coz im following all norms as per IE 1956, but still Civil Court have injunction-ed my n stopped my line work
sir, What is the minimum distance clearance from the Diesel tank to EB Sub station …For giving NOC to install 15000 litres Diesel tank in a private company which is very next to EB sub station ..can we allow..if there is an electical burst or disaster in the EB sub station will it affect the diesel tanks of the pvt company
HI Sir
Need to know the status overhead laying if HV and LV lay in the same pole, that is still under safety hazard or there is a dispute act installation,,,,need comment,,,,thanks
Depend upon Your Country Nome,Rules&Regulation ..Normally not in Practice but if Required to do for min Clearance Refer Electrical Safety Clearance Part-3 of this Blog.
Sir,
Could you please tell us the minimum distance (horizantal) required between an underground storage tank storing class A product (petrol) at a petrol pump and an HT (LT line also).
I have so much, but not able to find any such rule.
Please let me know in feet the distance that power lines can be above ground level, sidewalks, streets, etc. My email is pud56@aol.com. Thanks in advance.
Ground clearance,Street Clearance,Side walks for Power line for various voltage and Code is already given in the post of Electrical Safety Clearance from 1 to 4 of this blog.
If you need distance in Feet just convert meter in to feet…1Meter=3.28Feet.
I want to know the distance b/w two conductor of 400 kv transmission line….
Sir i wish to get clear details of the EHT 220kv OH line, Minimum Ground & Vertical Clearance,
the TLM officials are confusing & its making some Unwanted delay & convince ,some times it makes us feel they are taking us for ride & they are harassing.So please request you to kindly give me the proper details. Hoping for a positive response soon
Regards- Ravi
Ravi,
It is already given in the post of “Safety Clearance 1to4” by various Code and Standard
Hello Jignesh,
What is the fire Safety system required for 132 KV, 220 KV and 400 KV Sation.
and what fire safety standard followed in India.
Thanks and regards
Manish Shende
Dear Mr Jignesh Can you tell me Minimum clearance required
between HSD 16000ltrs to Under ground HT cable of 33kv.
Please refer Post of Electrical Safety Clearance Part-1 to Part-6
i found voltage between R-phase to neutral was 300V , between Y-phase to neutral was 315V and between B-phase to neutral was 50V, and between earth to neutral was 175V. Neatral was not disconnted. what was reason of high voltage between neutral to earth.
You will not get any difficulty in three phase load but get serious voltage various ion between Phase and Neutral in single Phase Load.
There are lots of Possibility of getting Voltage between Earth & Neutral.
(1) Neural Broken.
(2) Dry Neural Earthing Pit.
(3) Loose Earthing Pit Connection to Transformer Neural.
(4) In distribution There may be interchange between Earthing and Neutral.
(5) In Distribution field somebody locally Earthed Neutral (Except TC Neutral Earthing) (Multiple Neutral Earthing).
For more reference read “Neutral Floating” Post of this Blog..
hi jignesh
nice to see you running such a useful blog. a 66Kva line passes thru my commercial plot with two poles inside the boundary. i propose to build a shed . can u please suggest me the distance as to how far from the pole end can i start my shed walls and also how far can the slope of shed shud be from the wires???
thanx
what is the vertical electrical clearance to petrol pump
Hi Jignesh
The minimum clearance laid down in the CEA regulations, 2010 does apply on industrial Units also? if no then what are the limits and where do i find this?
Thanks in advance
Hi ……. Can any one explain the basis from which electrical clearances are derived…… i guess they have been derived from dielectric strengths of air….can any one elaborate this pls???
Yes definitely It depends on dielectric strength of Air..
Sir,
For high voltage testing of SF6 GCB the clearances of 150kV/meter is sufficent or not??? Please mention both clearances i.e. vertical & horizontal.
Dear Sir,
Recently i’ve bought a duplex in baroda and after i bought it, i get to know that my duplex is near to this Hyper Tension wire line. after discussion with the builder i found that he has left 12.30ft space between the house and the H. T. Line.
I would like to know
whether it would be sufficient distance between house and H. T. Line?
would there be any precaution i should take?
the house is ground+1 floor, can we build 2nd floor if we want to in future?
can there be any health issues if we leave close by H. T. Line with the distance of 12.30ft?
I do hope that you would be kind enough to enlighten me with your knowledge and experience.
Thanks
Tushar
Dear sir
I am planing to purchase 1 plot near HT lines. Distance between ht line & plot is 15m . Kindly suggest me is there any problem to helth if i built home at that place
hello sir,
I am doing a project in simulation. I want to know the distance between the lowest conductor of transmission line (carrying 345kV) and the ground.
Hi,
Could you please provide minimum electrical clearance required between phases of 11 kV Air break switch. A copy of supporting document would be appreciated.
Can you please tell me what should be the gap between LV panel to back side wall and side clearance with anothe LV pannel. and please tell me the same thing with HV pannel
Here LV means 415 V and HV means 6.6KV
Please refer old post of this Blog..”Safety Clearance Part 1 to 5″
for LV panel 300MM OR 1000MM (ACB PANEL OR APFC)
HV 1200 MM
Pl. intimate me horizontal clerence for 400 kV and 220 kV transmission lines
Please refer old post of this Blog..”Safety Clearance Part 1 to 5″
Can a 400 kV transmission line run in parallel to 220 kV transmisin line with a disatnce of 5.94 mtr. between their condcutor.
HI Jignesh,
Can u please tell me the Do’s & Dont’s for developing the Land by a Developer after laying underground 66KV Cable?
Dear Jignesh, please answer the above question . I’d be very thankful to u..
Dear Jigneshbhai,
How r u? Your knowledge is very useful to us so many many thanks to u.
And want to ask what is the power line crossing clearances for 1200 kV line to another power lines and give the refrence file so I can so to other and in IE rules it is given? If yes than plz. provide it to me.
Thanks a Lot.
Chirag Gandhi
subsequent to Indian Electricity Act 2003, the basis of Electrical safety also changed wrt said act in place of IE Rule 1956 or rules prior to 2003. Please detail the clauses/acts wrt to Indian Electricity act 2003.
Respected Sir,
Please clarify whether Emergency Door /Window can be placed near Transformer yard.
Regards,
Guru
ht clearnce
Sir, Pl Clarify if we can build a road across (North to South) of high tension line in our land? There are 2 HT lines running from East to West one 110000volts and the 2nd one is 230000 volts in our site. What is the ground clerence required.
What is the minimum allowable residual AC and DC voltage for operation /maintenance of electrical circuit??
It is the voltage that persists in the phase after disconnection of the equipment!!!
Plz give an idea of state highway crossing 11 kv and Lt line
vertical and horizontal clearance from ground .
and whom should shift HT/LT lines along the roads
For 33 kV
1. What should be the distance between two poles (Rail pole)
2.What is the calculation for conductor sag between two poles
There are any standard specifications for these??
CAN U PLEASE GUIDE ME ON GROUND CLEARANCE OF 33KV , 66KV , 132, 220 AND ABOVE LINES AS PER IE…
IS THERE ANY CHANGES IN RULE 77, IE 1956 IN ELECTRICITY ACT 2003?????
ANAND
Hello Sir,
Can you please tell me,
Allowable distance between Electrical & other network [may be water,fuel line] in Underground MEP services.
please share NEC/BS/else standard details.
Thanks in advance
Sushil
Qatar
Already given in the Blog with reference Standard..
Sir Could you please tell me whether partition wall between HT & LT panel is required ?IF no please send me the IS codes or any relevant documents
Mr. Jignesh parmar their is a amendment in the indian electricity act 2003 in 2005, u have not mentioned dat here, the standars for safety i.e, the ground clearance is changed…!!!
please have a check on this and then reply
what should be the minimum clearance required between to two parallel 33KV lines
Already given in the blog..
How to reduce the earth to neutral voltage (other than earth pit)?
I have one ac high voltage test set , I want to know what is the minimum distance to be leave from the false sealing to phase point , Phase point is at the height 1.5 mtr from the ground level .we will give the voltage between phase to earth with the sample up to 100 kv
,
Dear Mr Jignesh. I came to know that the BS 162 was replaced by BS 7354. Any changes on the minimum electrical clearance for indoor & outdoor? Can you share the BS 7354?
sir what is the distance between lpg storage godwon and 110kv line
Already given in the Blog..
Thanks
can u tell me shall our company lay the pipeline below 110 kv line?or how much we hv to maintained ?
Please guide me with , the minimum horizontal clearance between the conductor & the building incase of 220KV & 132KV transmission lines. Also do we have to keep some additional clearance for conductor swing due to wind etc.
hello sir,
In my case, 400KV line has been erected by PGCIL without prior notice and no compensation given to us. Is this possible or any electricity act is there to erect without giving compensation. It is huge loss to us because 1.5 hectares land is laid with 400KV line. Please suggest what i can do? can i get compensation? no trees.
from siddu
Please suggest that on transmission line 132KV for crossing of railway line which type tower is required and what should be ground clearence for that
When a pvc cable(6 sq mm, 2core) for lv consumer is passes by two adjacent building what is the horizontal and vertical clearance should be maintained?
11kV tranmission wire is going to pass by my house will it have any effect and what is the minimum distance between the wire and house wall
Hi Mr. Jignesh, is there any separation criteria between 33kV & 220kV underground burried cable recommended by code ??
Dear sir,
i need indoor clearances PHASE TO PHASE AND PHASE TO EARTH FOR 11KV,22KV,33KV as per IEC STANDARD.
thank you so much.GOD bless you,please may i know the minimum and maximum distance between two tower overhead lines 33 kV.or standard distance tower to tower ?conductor size 366.2 Sq.mm
Dear Sir,
Is the above given busbar clearance between phases is same for CU & AL or what.?
minimum clearance to be maintained between 33kv line crossing 11KV line
Dear Sir,
One of our project we have erected 22kv switchgear for substation and we have used armoured cable that is bottom entry for the switch gear we have removed the outer sheath of the armoured cable for a 0.5meter and connected to the switchgear bus bar.the problem is there is cable tray carrying armoured cables which is used for control purpose to the plc panel which is in bottom trench the distance between the cable tray and 22kv cable is 200mm.
my questions is since The 22kv cable running near by cable tray it will effect the control cable signals in the cable tray.
if yes what should be the distance between the cable tray and 22kv cable as per IEC std
and also send me calculation for this.
Looking forward for your response
very useful
Can any body tell what should be the minimum distance maintained from 415 V MCC to side walls and what should be the in between distance to be maintained in between two MCC (415V) panel as per IS
Sir,
What should be the min distance between 220kv transmission line & wind turbine.
Hi Sir ,
The information shared is very much useful . I am planning to buy a flat in chennai near perumbakkam and a HT line of 11 KV is passing 15 meters near the building . I was worried a bit but I am confident to proceed with the plan after reading your article . Thanks a lot .
Regards
Krishnan
hello sir,
a 1200 kv electricity transmission line is about to pass above my lawn.the line will be below the terrece of my house at par as the inclination of the line form the lower post to the upper post is around 45-50 degree as it is a slope..my questions to you are,
1)what should be the minimum distance between the wire and the house.???
2:what should be the minimum height of the wire from my lawn..??
3:what are the health risks ???
thank you and regards
yogesh sapkota
sikkim,INDIA
Can anyone give me any standard /reference for horizontal/parellel clearance of 400kv line from national highway. 4km line is proposed parallel. For tha purpose i want to know this clearance standard.
Kindly tell me any standard reference for the horizontal/parallel clearance required for the 400kv proposed transmission line from national highway.presently suggested rout by surveyor is 20m away from the national highway and it is running Parallel to NH upto 4 KM distance.
Can i get any standard which gives clearance details.
Dear,
I am planning to buy flat , which is located somewhat roughly about 500 meters away from 66kV power substation , is it safe . As I am not aware of such things but confused on reading few details on web that it may cause cancer.(emf).
kindly share your knowledge and give your expert view.
Thanks
good day sir,
thank you for sharing with us… i would like to know the vertical clearance of 13,2kv line constructed under 69kv line. thank you and best regards.
Rotchill P.Cejar
Philippines
Sir can I build a one story home under 400 kv line is there any violation what all documents are needed to get the permission and is there any health hazards bulding home under 400kv power line
Sir , a diesel pipe line ca cross the cable tray or not. if yes what should be the clearance. if not reason for that. please reply me sir.
Sir, What should be the clearance between DTC & Water body?
I am Rekesh and i am an engineer in electrical i done my engineering from Gujarat university i have 5 year experience in DTC & water body. I wanna join your organization.
Hello Sir , I wonder if it is theoretically possible to have 11kv line and 33kv line on the same poles? I understand that minimum separations between 11kv and 33 kv needs to be 355mm, therefore it seems possible . Do you know of any precedents ?
Hello Sir,
I am Satya, my house is under the 2 lines of high voltage wires, and frequently i am noticing earthing problem for my equipment
can you pls. suggest can i use earth pits for my residence and the wire is 15 feet above from my ceiling
or pls. suggest how to keep my electronic safe
what is minimum clearance required form communication cable to MV/KV power cable?
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What is minimum clearance as per rule between 66 KV UG power cable and CNG gas pipeline
to be laid under ground beneath power cable.
Sir,
As per Qatar General Electricity and Water Corporation standard
for 63KV Distance between Cable and Gas Pipe line Horizontal 3 Meter and Vertical 1.5 Meter.
If a transmission line ( 11 Kv/33 KV etc) running parallel to 2X25 Kv traction line for a distance of 1 Km-3 Km
what will the induction effects and what should be minimum horizontal distance to be maintained between traction and transmission lines rnning parallel please post calculations with some examples
What should be diffeance between 11kv line and tree according to indianelectricity rules
Hi…..
can you please tell me the safe distance from 66KVA for building the house in bangalore.
also is it OK to keep a GAS cylinder near 66KVA power line.
please suggest.
Minimum vertical ground clearance of 66 KV and above lines over National Highways as per IE Rules/CEA Rules.
Dear Sir, in HT & LT transmission lines crossings general LT line was bottom & HT line was upper. what happens if its vice versa( HT bottom & LT uppeer)
Dear sir, Building rooftop to 33KV Electrical line distance (Horizontal & Vertical Clearance)
Dear sir can i have BS:162 document
pls tell me distance between 800KVDC over head power line and voice communication(.3 khz to 4khz) under ground cable
we are using the channel of 2390mm for 33kv subtransmission line using open conductor. Does it may cause any problem due to inductioon or not???
what’s the minimum clearance between 132 kv outdoor step up transformer with human???
What should be the height of 4 pole DP structure with an 33kv 3-phase isolator on top and operable using a gangue rod with its handle at bottom , bushings , insulators and for termination of each incoming and outgoing 2 nos 33kv cables. Also , pl clarify if there is a minimum requirement of 11m or 13m height of pole structure under certain conditions ?
jignesh sir,
i want to know if mpeb not follow the rule of minimum clearance from residential house for shifting 33 kva ht line so what action we can take.please suggest me .
Dear Sir,what will be the minimum clearance of 380 kv cables from severage PIPE
line above ground.KINDLY GIVE THE REFERENCE ALSO.
I m in Oman,as per one tender scope we have to construct chain link fencing in switch yard,where we have Power transformers installed,can you tell me min how much safety horizontal clearance should be maintained from the fence is the system level is 132 kv & 220 Kv.Plz help
my home is 300mtr distance from service electric.i have an ac and it is not take load when on.i have 5 kv stablizer also,how can i use ac pl tell me.
sir, i have agriculture land 0.5 acre in tamil nadu, erode dist.
110kv cable crossing exactly middle on the land.
i want to make poultry farm in this land.
what is the rules for this.please help me.
thank you.
How many distance between transformer and diesel generator as per ie rules
clearance to be maintained for 110kV Lines to Air port
i like ur profile jignesh sir
and i want a qns to u relates my project…..
can i…
how should measure the emf from 35kv line, which are going from in front my college building, indore
can mobile apps(EMF sensor, EMF detector) give a accurate value,if we do the analysis of my college campus.
Dear sir,
what is the distance required between 11 kv cable and LT cable in a same trench ? Any partition wall is required between HT and LT cables ?
Regards
M Siva
Hi sir,
What is the minimum clearance of between the underground electrical lines and water lines with related specific code or standard.
Thanks
what should be the minimum distance between ht panel & transformer??
for a 400 kv line what would be the spacing between the phase conductor
what should be minimum clearence above HFL in navigable river.
As per the IE Rule 1956 or K E B act 2010 what is the minimum safety distance should maintain for installation of H S D U/G storage tank I.e either transformer or HT line
Dear sir please tell me pole/tower heights for different voltage levels i.e. starts from 11kV to 400 kV.
Dear Sir,
Please can you tell me what should be the ground clearance between HV side and ground
i am studying electrical and electronics engineering,i want real time detail about transmision and distribution.
Dear Sir
please tell me what is the gap between 11kv 630kva transformer and 11kv single ht breaker panel and is there required any fire wall between those two equipment’s. any documents to be refer
Dear sir i have a doubt what should i maintain gap between 11kv 630kva transformer and 11kv ht breaker panel and is there any requirement of fire wall between them please suggest any standard document to be followed
I think IE-1956 has been revised/updated. What is the clearance for 33 kV as per revised rules.
Hi sir we are planing to lay a 33 KV transmission line which IS stand i can refer and,
what is the distance i have keep with existing 11 kv line as per stranded.
Hi Sir
Plz tell me the minimum clearance for petrol pump from 400kv Substation and 440/220 kv line.
And which book should be refer for this.
kindly reply to jay.machave@gmail.com
Hi Jignesh
Can you provide me the IS/IEC Ref & details for phase to phase clearance for 415V V System.
sir can you please reply on rupeshharitash@gmail.com for my following query
what is the minimum distance requirement for two 66kv/11kv transformers in dence residential
area.will be highly thankful for your responce
why indoor and outdoor phase to phase and earth clearnce is different.pl explain ..
Hi I am Mr perme from Arunachal, there is a 132kV overhead line as well tower erected and passing near my house.So you plse suggest me the required clearance of 132KV tower and over head line from my house?
Dear sir we have to install 11kv/0.440 v [2500kva] transformer and our LT load is more than 2800 amps so we have no any adea regarding distance between transformer and LT panel to save power losses so sir plz guide to us how much distance required between transformer and LT panel.
what is ground clearaance in100kv & 1200kv?
Please reply
Hi… what is the mininmum distance from ground to cable tray in a working area.
Hello Sir,
Please say Distance between P-E & P-P in SF6 Medium
hiii. I am an electrical enginnering student. I wanted to know if there is a 220 KVA Line, what is the working height and conduction limit from ground.
Can we keep 800kv electrical generator control panel outside , the temp more than 50 degree cel
Dear Sir,
What is safe surrounding clearness distance for 11 KV power cables ( 500 mm2 )?
Dear Sir, please tell about the mid span clearances of different voltages ranging from 11 kv to 800 kv with different roads categories like metalled road, highways, NH, Mega highway express way etc
I bought a flat, and a 220KV EHT goes through it. The distance of cables from the towers are around 8-9 metres, is this safe to habitat?
Also, our society is interested in moving this EHT line. How do we go about doing it?
Can any body share the standard heights of P,R,S lattice type towers used in 132 KV Transmission line
What is standard voltage and frequency variations for different voltage levels
What is basic consideration while selecting the insulation voltage level of power cables.
I mean in 415 V LT cables there are three standards available in the market like 500 V,690V & 1.1 KV. How to select which one is suitable for our requirement.
Sir i want to get knowledge about sub station installation on HT cable
1). If I have incomming side 33 kv VCB of 3500 KVA and i want to distribute its outgoing supply ( 33 kv) with the help of ABC cable to 4 nos of 1000 KVA transformers.
2) Can it be done with the help of bus-bar of 33kv level, if so what should be the separation between R-Y-B bus bars & Four connecting cables of same phase on R phase bus-bar
dear sir,
what vertical clearance required HT line to trasformer yard
Dear sir,
Can we install trasnformer yard below the HT LINES need your guidelines.
thank you
Manjunath
can you please define high voltage clearance
What are the standards for clearance between communication cables, ABC cables and cables and ground for 230/400 & 11kv and 33 kv lines? Also between cables and line conductors.
आदरणीय श्रीमान,
मैं आपसे एक जानकारी चाहता हूँ। 220 वोल्टेज की करंट की पॉवर सप्लाई लाइन जो ट्रांसफारमर से निकल कर घरों की ओर जाती है। उसके लिए लगने वाले बिजली के खम्भे की किसी मकान से न्यूनतम दूरी क्या होगी।
minimum clearance from house/ building.
और इस सम्बन्ध में लिखित कानून या एक्ट कौन सा है। कृपया उसका नाम दे ताकि हम उसे नेट से डाउनलोड कर लें।
धन्यवाद
IE 79 & 80
Sir Could you please tell me whether partition wall between HT & LT panel is required ?IF no please send me the IS codes or any relevant documents
How much is the minimum distances between 132 Kv electric line and the mobile tower nearby ????
In 220 kv line oil leakage observed from Current transformer. What may be the reason for leakage and how to refill the oil
sir ,what is the distance between train roof and electrical cable.
Sir,below 220KV line to what extent we can grown plant what about compensation given to farmers to cross cultivating land
Can you help me regarding busbar phase to phase clearance for AC panel for solar project (12 In, 1 Out), which is placed outdoor (We have given IP65 cubical enclosure for outdoor) and also please let me know in which IEC edition busbar clearance is mentioned with table, or in any British standard or in Indian standard edition, any of these. one of my client is asking for proof mentioned in electrical standard book.
Now as per our LT panel of 415 Volts, Input busbar phase to phase clearance given is 50mm, Output busbar phase to phase clearance given is 27mm. Input Busbar used is 20/6mm for 100Amps MCCB, output busbar is 2 runs 60/10mm for 1000 Amps 4-pole ACB
what should be the safe distance between a petorl bunk and EHT line
Dear Sir,
Your blog is very informative. I am Not an electrical engineer.
My Question- In India, in bigger cities – In typical apartment building or society (say having 150 Houses) – the builder has made a substation with Step down transformer. So the supply Voltage to HV side of transformer would be 11 or 22 or 33 KV.
In the same place there are single houses and bungalows. The distribution company of the state is providing a 230 Volt supply for them.
My Question – Why cannot those 150 houses be provided a 230 Volt supply each directly by the Maharashtra State Electricity Board?
My question is when a 230 Volt line is already in place, then why bigger society is required to make their own substation.
After Installation and commissioning, whom does Substation belong to Electricity board or Society/Builder?
Mimimum distance maintain HT panel feeder to transformer incomer
What clearance required for UG power cable and UG water pipe line
Dear sir,
Am designing the LT panel
LT GRADE 440 V AC, R,Y,B,N AND E 4000 A, I (SC)50 KA. and temperature rise for 4 hours.
Kindly suggest us the clearance for phase to phase ,phase to neutral and neutral to earth .
Bus bar selected – Aluminium 125 x 10 mm
Karthik.M.S.
Dear sir,
kindly let me know any handbook for
1. Electrical panel building
2. IS / IEC STANDARDS
Mujko 440 kv tower par kam lagna h mere saath 3-4 log h
Dear Mr. Parmar ,
What should be clearance between a lighting pole ( 12 mtrs ) with 6 nos LED 250W flood lights and HT overhead lines ( 35KV ) passing over a sports field . Are there any refernce and statutory guideline books / standards for the same. Where to refer ?
Mayank
Dear Mr.Jignesh Parmar, Pl’s let us know the Low Voltage Panel around clearance for the installation.
Dear Sir, Jignesh,
Thank you for your kindly such as Technical grand brother in Engineering for all response you shared with us. My question is what poles plumps used for in MV lines of 11kV?
Dear Mr.Jignesh,Could you please explain a case study- My building is having a horizontal distance less than 1.2 metre from a concret electric pole which is not having any iron angle and the the low voltage wire has been wined through the white insulator which is directly on the pole.
As a remedy can i put an Iron angle projected towards the street and shift the low voltage wire in order to increase the horizontal clearance from my building.
Kindly give the IS Standard code for busbar clearance on indoor panel for 415 volt system
Please tell me what is the min allowable distance between 33 KV parallel feeders…
2.5Mtrs
What is your minimum clearance between shield wire and phases in a 33kV line?
Sir, 400kv Busduct is running from the top of the control room and just below SCS system is available where engineers have to work frequently. Is it safe to work under this environment?
Express highway Clearance ?
See how much land level is from the express highway ?
what should be clearance in 220 kv line phases when source is same and on same cross arm
4.5Mtrs
I assumed HT line is very near to my flat which is at 4th floor can you pls give me idea on minimum safety criteria on distance from balcony to HT line etc.
Horizontal 2Mtrs for 33KV level +0.3mtrs for every 33KV
Vertical 3.7Mtrs for 33KV level +0.3mtrs for every 33KV
Dear sir
This is Vasantakumar, I am working in one of PVT.ltd Company I am having PT(33kv) Breakdown Continous 6 Times 3Years So can You guaid me How to Stop it
Sir,,how can vertical distance from teensheet ouse.
sir for 33kv line need pole to pole distance
Minimum Electrical Clearance As Per BS:162. for 33kV enclosed , Minimum Phase to Earth is 222mm, but as per up gradation BS these dimension are same or change.
Hi Jignesh
Can you provide me the IS/IEC Ref compare to BS 162 & details for phase to phase clearance for 33kV enclosed System
What shall be Minimum Horizontal Clearances between 22kv HT switch gear/Transformer and underground water tank?
What is the distance between the residence and substation
sir, what is the clearance of 66KV and 33KV line crossing area
please let me know.. What should be the clearances required for under 66kV HT lines to nearest building??
Hi Jignesh Sir,
I have question that I’m planning to purchase a house which is in vicinity to 11 KV line. Would pls share what should be the distance vertically and horizontally between house and the lines to avoid undesired EMI or static effect on body? I will really appreciate your expert opinion.
Am glad for relevant information like this. Update me on more High voltage notes, on-site transformer tests. Thank you
Hi , wht should be the Clearances from 66KV substation Buildings to gas station ? wht is international standard to refer?
Indian Electricity Rules 1956 have been repealed. New Central Electricity Authority (measures related to safety and electric supply) Regulations 2010 have been notified by government of India.
my name is Ejaz Ashraf, worked in Siemens.I am in Karachi,Good Information Summerised by Jignesh.
Sir
Please let me know the minimum Horizontal clearance between 11 KV VCB panel & Control and switch gear panel.
sir, what is the clearance between ground to 440 volt ariel bunch cable LT Line?
sir I read all specification but I have not got clearance between two 11 kv parallel feeders
sir, what is the clearance between 15 MT LPG bullet and 110 kva tower line? i mean the height and distance.
pl.mention the minimum required clearance between waterpipeline and cable
Hi Sir,
Do you know the minimum clearance, vertical and horizontal, between ground grid conductors and a gas pipe? I sincerely appreciate if you can help me out in this matter.
Sir,
Can you please help me to provide calculation for phase to phase clearances in air at 800VAC system electrical panel?
Hello Sir,
Pls. suggest minimum required clearance between 765kv line(Lowest conductor) and OIL pipes & Gas Pipes,
I am using PLS-CADD for line design.
Provide me phase to phase clearance in 765 kv transmission line
If 11kv and 220volts lines are going on same poles.how much distance should maintain between 11kva and distribution line?.Topside is 11kv line and it’s bottom is LTE line.plz answer me.
change over without electrical person in LT panel
Hi there we brought a new flat and there is a 33kv (3 lines) passing in 4.5 meters next to 2 bedrooms. Can you please confirm any health issues.
Hi there, I bought an flat next to 33kv lines 3, 2 bedrooms are there to towards lines from 4.5 meters is there any health issues or problems.
What is the safe distance 765 kv for home
what is the safest ground clearance for 132kv electrical line crossing national highway
Nice collection. I have question Bellow answered me please. What is line to line clearance s of Various voltage ?
i am a new petrol pump wants to know about the minimum distance from over head high tension line (11-33kva) from a petrol pump licence area.
Very good compilation of electrical clearances.
Please share minimum clearances between bottom phase wire of one EHV transmission line and top earth wire of other EHV transmission line. And it’s reference.
Actually I am looking for 132 kV crossing over 220 kV transmission line.
Thanks.
Hello Jignesh Parmar,
There is a 400KV DC Transmission line on my land, Can you tell me what is the minimum distance to build a home / Resistance tower near it.
Also tell me who is the person to contact for compensation without inform us built that 400kv DC kudankulam transmission line on Tirunelveli to kollam ?
ranjan432@gmail.com
Are you sure these clearances are valid even today, in line with the latest IEC Standards?