Minimum Electrical Clearance

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Minimum Electrical Clearance. | Electrical Notes & Articles

Electrical Notes & Articles Sharing Abstracts,Notes on various Electrical Engineering Topics.

Minimum Electrical Clearance. APRIL 22, 2011 110 COMMENTS (HTTP://ELECTRICALNOTES.WORDPRESS.COM/2011/04/22/MINIMUM-ELECTRICALCLEARANCE-2/#COMMENTS)

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

electricalnotes.wordpress.com/2011/04/22/minimum-electrical-clearance-2/

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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


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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


15.40 Meter


17.90 Meter


19.30 Meter


23.40 Meter

Various Air clearances to be provided as per IE rule 64 electricalnotes.wordpress.com/2011/04/22/minimum-electrical-clearance-2/

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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 Extra High Voltage

3.7 Meter 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) electricalnotes.wordpress.com/2011/04/22/minimum-electrical-clearance-2/

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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


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For pitched Roof Line Passes Over Building Vertical Clearance

2.5 Meter

Line Passes Adjustment of Building Horizontal Clearance

1.2 Meter About these ads (http://en.wordpress.com/aboutthese-ads/)

FILED UNDER UNCATEGORIZED About Jignesh.Parmar Jignesh Parmar has completed his B.E(Electrical) from Gujarat University. He has more than 11 years experience in Power Transmission-Power Distribution-Electrical energy theft detection-Electrical Maintenance-Electrical Projects(Planning-Designing-coordination-Execution). He is Presently associate with one of the leading business group as a Assistant Manager at Ahmedabad,India. He is Freelancer Programmer of Advance Excel and design useful Excel Sheets of Electrical Engineering as per IS,NEC,IEC,IEEE codes. He is technical Author for "Electrical Mirror" and "Electrical India" Magazines. 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.

110 Responses to Minimum Electrical Clearance. S.CHELLAPPA says: June 24, 2011 at 8:12 am 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 Reply Shivaji Mande says: electricalnotes.wordpress.com/2011/04/22/minimum-electrical-clearance-2/

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May 9, 2012 at 1:26 pm 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??? Reply Vikas Garg says: July 5, 2011 at 5:10 pm i m Electrical Engineer with 2 year of experiance in grid construction and transmission. can u please suggest me some Electrical handbooks Reply Ramachandra laxman says: July 5, 2011 at 6:06 pm Hai sir. can u please tell me what is the clearence between two phases in a 11KV indoor substation panel. Reply hari says: July 20, 2011 at 12:37 pm 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 Reply Jignesh.Parmar says: July 20, 2011 at 2:42 pm Please refer Indian Electricity Rule abstract http://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 Reply Sanjay Bhalodiya says: May 20, 2013 at 9:16 am Dear Mr. Jignesh, electricalnotes.wordpress.com/2011/04/22/minimum-electrical-clearance-2/

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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 agni says: July 3, 2013 at 10:23 am 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 Gnanaprakash says: July 19, 2013 at 3:53 pm WHAT IS THE DISTANCE BETWEEN THE 33KV LINE POLES?ANY IE Rule? om prakash says: December 12, 2011 at 5:00 am Clearence between 11Kv & 220Kv when crossing is 4.58 Mtr Reply S A PATEL says: August 27, 2011 at 3:26 am 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 ??? Reply Jignesh.Parmar says: September 8, 2011 at 4:20 pm 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


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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. Reply Pradeep Kumar Yadav says: September 14, 2011 at 9:57 am 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 Reply Jignesh.Parmar says: September 14, 2011 at 4:50 pm 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 Reply Pradeep Kumar Yadav says: September 15, 2011 at 8:51 am sir,


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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 Jignesh.Parmar says: September 17, 2011 at 10:52 am 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 Henri Botha says: June 5, 2012 at 1:48 am 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 amin ur rashid khan mayo says: September 16, 2011 at 1:45 pm 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 electricalnotes.wordpress.com/2011/04/22/minimum-electrical-clearance-2/

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Reply antony says: October 19, 2011 at 7:22 am 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 Reply antony says: October 19, 2011 at 7:24 am can 150kVa transformer supply a 23km 33kv line? if yes after how long should the conductors be transposed Reply om prakash dashora , Assistant Manager , MPRRDA. Dhar says: December 4, 2011 at 12:30 pm How maney minimum vertical clearance should be adopted for highway construction under power line 400 kv. Reply Jignesh.Parmar says: December 4, 2011 at 1:17 pm Please refer Electrical Notes of This Blog.. Reply babsabM. Yunus Shaikh says: December 7, 2011 at 6:16 am 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 Reply sanjay says: January 20, 2012 at 11:42 am How to decide the busbar size & how to decide the electrical clearences between phase to phase ,phase to earth? Reply sanjay says: January 20, 2012 at 11:43 am What is the exact difference between precision & accuracy? Reply prashant agrawal says: electricalnotes.wordpress.com/2011/04/22/minimum-electrical-clearance-2/

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January 22, 2012 at 4:48 am 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. Reply Nazeer says: July 25, 2012 at 6:23 am 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. Reply gajendiran says: February 8, 2012 at 3:48 am i need clarification, minimum distance from Transformer HT side to fencing Reply vikas says: February 8, 2012 at 3:11 pm 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 Reply gajendiran says: February 13, 2012 at 11:56 am sir, i’m gajendiran working as Electrical engineer in L&T. minimum clearance between 22KV HT cable & LT ,LV cable in UG system Reply Jignesh.Parmar says: February 16, 2012 at 5:05 pm Please refer Abstract of CPWD and IS code of this Blog Reply Ejaz Ahamed says: February 15, 2012 at 6:20 am Hi sir, Could you please tell me the minimum space required around an indoor substation(33/415v) so as to attain fire safety requirements?… Reply Naveen says: February 25, 2012 at 2:25 am electricalnotes.wordpress.com/2011/04/22/minimum-electrical-clearance-2/

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pls refer any book for substation design. I want Know details of SAS also. Reply Nikita says: February 26, 2012 at 6:02 pm 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? Reply Ar M S Devarmani says: February 27, 2012 at 5:22 am 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 Reply mega says: February 27, 2012 at 11:26 am why we have maintain phase to phase clearance? if we did’t maintain the clearance…what will happen? Meganathan.A Reply Jignesh.Parmar says: February 27, 2012 at 4:29 pm R u Electrical engineer !!! Reply karthick says: February 28, 2012 at 5:48 pm y upper & lower lips have some gap for eating ph to ph clearance to aviod short circuit of phase to phase Reply Marcos says: June 25, 2012 at 12:17 am 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) Reply electricalnotes.wordpress.com/2011/04/22/minimum-electrical-clearance-2/

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manoj arora says: March 23, 2012 at 3:56 pm 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 Reply Jignesh.Parmar says: March 23, 2012 at 5:52 pm As Per IE Rules: Low/Medium Crossing to 11KV to 66KV= 3.05 Meter Reply manoj arora says: March 24, 2012 at 3:00 am But i think it is for bare conductor , i need to know about cable (Both are cable) manoj arora says: March 25, 2012 at 7:47 am waiting for advice Reply Jignesh.Parmar says: March 25, 2012 at 10:36 am Power cable to power cable Clearance not necessary; however, larger the clearance current carrying capacity would be better Reply manoj arora says: March 26, 2012 at 8:13 am 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 Reply muthukumaran says: March 27, 2012 at 4:16 am 14/25 Hi could you share What does the IEC mentions about the clearanace between phase to ground and


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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? Reply sudarshan says: March 28, 2012 at 2:10 am 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 / Reply Abhishek Sarkar says: March 28, 2012 at 6:26 pm what is the minimum ground clearance required for a low tension aerial bunched cable line? Reply Hemant Sali says: April 4, 2012 at 6:41 am 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. Reply Jignesh.Parmar says: April 4, 2012 at 3:43 pm Thanks for highlighting Typing ERROR. Reply Hemant Sali says: April 8, 2012 at 9:44 am 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. Jignesh.Parmar says: April 8, 2012 at 11:12 am

Dear Completely Agree with You. But Still Lots of Engineer confused between IE Act and 15/25 IE


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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. Hemant Sali says: April 8, 2012 at 9:14 am for clearance between underground electrical cable and other utility service like gas, water, sewage pipe lines is there any reference in IEC or IEEE Reply ram says: April 14, 2012 at 12:26 pm please send me notes regarding testing,commisioning,operation & maintenance of electrical equipments for132 kv s/s Reply Santosh Behera says: April 20, 2012 at 6:20 am 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 Reply Jignesh.Parmar says: April 22, 2012 at 1:31 pm 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. Reply Tahid Alli says: May 3, 2012 at 2:48 pm hi , sir i am satyam want to know about all ie rules in internet ….plz help me….i am not belongs to elect. engg. Reply Senthil says: June 19, 2012 at 4:44 pm electricalnotes.wordpress.com/2011/04/22/minimum-electrical-clearance-2/

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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 Reply akhilesh sharma says: June 21, 2012 at 5:46 pm sir, what sould be the min. distance between new petrol pump and 11kv line in national highway Reply Julian Rudzki says: June 27, 2012 at 8:34 am what is the minimum clearance between 100 mm water pipe and 11kv cable Julian Reply ram chandra says: July 5, 2012 at 7:46 am 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. Reply Jignesh.Parmar says: July 12, 2012 at 4:04 pm Please Refer Abstract of IE rules and CPWD of this Blog. Reply CHANDRASHEKHAR M says: July 6, 2012 at 4:04 pm 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. Reply CHANDRASHEKHAR M says: July 6, 2012 at 4:12 pm SIR,


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SIR, FOR 22 KV FEEDING D/C OVER HEAD LINE WHAT SHOULD BE THE CLEARANCE FROM GROUND , PHASE TO PHASE AND PHASE TO EARTH Reply mahesh.b says: July 13, 2012 at 8:36 am SIR PLEASE LET ME KNOW THE GROUND CLEARENS OF 66KV LANE PASSING ABOVE THE STREET AND THE CONSTRUCTION DISTANCE (GROUND CLEAREANS ETC) Reply Jignesh.Parmar says: July 13, 2012 at 2:11 pm It is already given On Blog…Just Read Abstract of IE Rule and CPWD. Reply Subhendu Mohanta says: July 20, 2012 at 11:57 am 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) Reply Shailesh tripathi says: July 21, 2012 at 6:10 am Hai sir please tell what is the minimum clearence between 11 kv HT line & 415 v LT line at the crossing. Reply Jignesh.Parmar says: July 21, 2012 at 2:41 pm Refer Abstract of IE Rules and CPWD of this Blog.. Reply Lalan says: July 28, 2012 at 1:13 am 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 Reply joshthangiah says: July 29, 2012 at 7:15 am 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 electricalnotes.wordpress.com/2011/04/22/minimum-electrical-clearance-2/

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Reply SYUKRI says: August 12, 2012 at 1:45 pm 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 Reply Jignesh.Parmar says: August 12, 2012 at 2:09 pm 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. Reply Kapil says: August 17, 2012 at 9:33 am 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. Reply Rsy Buxton says: September 5, 2012 at 2:53 pm Please let me know in feet the distance that power lines can be above ground level, sidewalks, streets, etc. My email is [email protected]. Thanks in advance. Reply Jignesh.Parmar says: September 5, 2012 at 3:05 pm 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. Reply lordakash1989 says: September 6, 2012 at 8:49 am I want to know the distance b/w two conductor of 400 kv transmission line…. Reply Ravi says: September 7, 2012 at 6:18 pm 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 electricalnotes.wordpress.com/2011/04/22/minimum-electrical-clearance-2/

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me the proper details. Hoping for a positive response soon Regards- Ravi Reply Jignesh.Parmar says: September 8, 2012 at 2:53 pm Ravi, It is already given in the post of “Safety Clearance 1to4″ by various Code and Standard Reply Manish Shende says: September 11, 2012 at 4:52 pm 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 Reply Imam Jaffer says: September 25, 2012 at 12:48 pm Dear Mr Jignesh Can you tell me Minimum clearance required between HSD 16000ltrs to Under ground HT cable of 33kv. Reply Jignesh.Parmar says: September 25, 2012 at 2:51 pm Please refer Post of Electrical Safety Clearance Part-1 to Part-6 Reply sunil says: November 6, 2012 at 5:42 am 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. Reply Jignesh.Parmar says: November 6, 2012 at 4:58 pm 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. electricalnotes.wordpress.com/2011/04/22/minimum-electrical-clearance-2/

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(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.. Reply anil says: November 22, 2012 at 9:23 am 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 Reply saroj says: December 10, 2012 at 12:27 pm what is the vertical electrical clearance to petrol pump Reply Nachiketa says: December 11, 2012 at 12:02 pm 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 Reply Kiran says: December 28, 2012 at 12:00 pm 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??? Reply Jignesh.Parmar says: December 28, 2012 at 1:56 pm Yes definitely It depends on dielectric strength of Air.. Reply Abhijit says: January 8, 2013 at 8:16 pm

Sir,


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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. Reply Tushar Patel says: January 10, 2013 at 6:45 pm 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 Reply ram says: January 14, 2013 at 8:28 am 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 Reply sam says: March 6, 2013 at 9:06 am 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. Reply Ankur says: April 11, 2013 at 5:34 am 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. Reply electricalnotes.wordpress.com/2011/04/22/minimum-electrical-clearance-2/

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Uttam Dutta says: April 30, 2013 at 4:20 am 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 Reply Jignesh.Parmar says: April 30, 2013 at 2:12 pm Please refer old post of this Blog..”Safety Clearance Part 1 to 5″ Reply gajen says: May 1, 2013 at 12:34 am for LV panel 300MM OR 1000MM (ACB PANEL OR APFC) HV 1200 MM Reply O.P.Bansal says: April 30, 2013 at 12:54 pm Pl. intimate me horizontal clerence for 400 kV and 220 kV transmission lines Reply Jignesh.Parmar says: April 30, 2013 at 2:12 pm Please refer old post of this Blog..”Safety Clearance Part 1 to 5″ Reply O.P.Bansal says: May 1, 2013 at 8:59 am Can a 400 kV transmission line run in parallel to 220 kV transmisin line with a disatnce of 5.94 mtr. between their condcutor. Reply Dharmesh says: May 15, 2013 at 5:58 am HI Jignesh, Can u please tell me the Do’s & Dont’s for developing the Land by a Developer after laying underground 66KV Cable? Reply Dharmesh says: May 21, 2013 at 12:09 pm Dear Jignesh, please answer the above question . I’d be very thankful to u.. Reply electricalnotes.wordpress.com/2011/04/22/minimum-electrical-clearance-2/

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Chirag Gandhi says: May 31, 2013 at 7:10 am 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 Reply rameshan says: July 25, 2013 at 8:22 pm 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. Reply Gurudatt says: July 26, 2013 at 7:54 am Respected Sir, Please clarify whether Emergency Door /Window can be placed near Transformer yard. Regards, Guru Reply pankaj says: July 26, 2013 at 2:46 pm ht clearnce Reply Fernando says: August 1, 2013 at 7:03 am 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. Reply Shatrughan Yadav says: August 3, 2013 at 11:25 am 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!!! electricalnotes.wordpress.com/2011/04/22/minimum-electrical-clearance-2/

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Reply Sub Division officer M S E D C L says: August 21, 2013 at 4:45 pm 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 Reply ravipvr05 says: August 22, 2013 at 2:23 pm 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?? Reply

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Minimum Electrical Clearance

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