Minimum Electrical Clearance

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Minimum Electrical Clearance.

APRIL 22, 2011 110 COMMENTS(HTTP://ELECTRICALNOTES.WORDPRESS.COM/2011/04/22/MINIMUM-ELECTRICAL-CLEARANCE-2/#COMMENTS)

Minimum Electrical Clearance As Per BS:162.

INDOOR

Voltage in KV Phase to earth in mm Phase to phase inmm

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 inKV

To ground in mm Betweensection(mm)

11 2750 2500

33 3700 2800

66 4000 3000

132 4600 3500

220 5500 4500

Minimum Ground Clearance As Per IE-1956(Rule77)

Voltage in KV To ground in mm

132 6.10

220 7.00

400 8.84

800 12.40



Minimum Clearance between Lines Crossing EachOther (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 & NarrowGauges

Above 66KV up to 132KV 14.60 Meter

Above 132KV up to220KV

15.40 Meter


17.90 Meter

Above 400KV up to

500KV

19.30 Meter


23.40 Meter

Various Air clearances to be provided as per IE rule64



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

SectionClearance(Mt)

2.8 3.0 3.5 4.3 6.5

Clearances from Buildings of HT and EHT voltagelines IE Rule 80

Vertical Distance

High voltage lines up to

33KV3.7 Meter

Extra High Voltage 3.7 Meter + Add 0.3 meter forevery 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 forevery additional 33KV

Clearance above ground of the lowest conductor Asper 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)




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 / Tramwires (IE Rule 78)


High Voltage Line Up to 11KV 1.8 Meter

High Voltage Line Above to11KV

2.5 Meter

Extra High Voltage Line 3.0 Meter

Clearances from Buildings of low & mediumvoltage lines(IE Rule 79 )

For Flat roof, Open Balcony, Verandah Roof and lean to

Roof

Line Passes Over Building VerticalClearance

2.5 Meter

Line Passes Adjustment of Building

Horizontal Clearance

1.2 Meter



For pitched Roof

Line Passes Over Building VerticalClearance

2.5 Meter

Line Passes Adjustment of Building

Horizontal Clearance

1.2 Meter

FILED UNDER UNCATEGORIZED

About Jignesh.Parmar

Jignesh Parmar has completed his B.E(Electrical) from Gujarat University. He has more than 11 yearsexperience 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 FreelancerProgrammer of Advance Excel and design useful Excel Sheets of Electrical Engineering as perIS,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. Hewants to Share his experience & knowledge and help technical enthusiasts to find suitable solutions andupdating themselves on various Engineering Topics.

110 Responses to Minimum Electrical Clearance.

S.CHELLAPPA says:

June 24, 2011 at 8:12 amThere seems to be an inadvertent error (probably typing error)Under the headingMinimum Ground Clearance As Per IE-1957 (Rule 77), the heights are given in mm

Kindly correct the same

ReplyShivaji Mande says:

About these ads (http://en.wordpress.com/about-these-ads/)



May 9, 2012 at 1:26 pmJignesh sir,

Can you pl. explain, what should be the height of foundation of Indoor transformer (22KV, 1MVA) from ground. Which standard do we refer for that???

Reply

Vikas Garg says:July 5, 2011 at 5:10 pmi m Electrical Engineer with 2 year of experiance in grid construction and transmission. can u please

suggest me some Electrical handbooks

ReplyRamachandra laxman says:

July 5, 2011 at 6:06 pmHai sir. can u please tell me what is the clearence between two phases in a 11KV indoor substationpanel.

Replyhari 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 aswhen new 11 kv line to be erected /passed just below at mid point tower of 220 kv line

Regards,Hari VallavahMail ID hari.v.sharma @gmail.com

ReplyJignesh.Parmar says:July 20, 2011 at 2:42 pm

Please refer Indian Electricity Rule abstracthttp://electricalnotes.wordpress.com/2011/04/22/minimum-electrical-clearance-2/Minimum Clearance between Lines Crossing Each Other As Per IE-1957 RulesSystem Voltage 132KV 220KV 400KV 800KV

Low & Medium 3.05 4.58 5.49 7.9411-66KV 3.05 4.58 5.49 7.94132KV 3.05 4.58 5.49 7.94

220KV 4.58 4.58 5.49 7.94400KV 5.49 5.49 5.49 7.94800KV 7.94 7.94 7.94 7.94

ReplySanjay Bhalodiya says:May 20, 2013 at 9:16 am

Dear Mr. Jignesh,



Can you give detail of What is the minimum P-E clearance between conductor(Jumper) toIPS tube in air for voltage 420 KV as per different standard ?

P-E when IPS EathedP-P when conductor & IPS tube both charged.

Regards,Sanjay Bhalodiya

agni says:

July 3, 2013 at 10:23 amSir Could you please tell me whether partition wall between HT & LT panel is required ?IFno please send me the IS codes or any relevant documents

Gnanaprakash says:July 19, 2013 at 3:53 pmWHAT IS THE DISTANCE BETWEEN THE 33KV LINE POLES?ANY IE Rule?

om prakash says:December 12, 2011 at 5:00 amClearence between 11Kv & 220Kv when crossing is 4.58 Mtr

ReplyS A PATEL says:

August 27, 2011 at 3:26 amEmpty 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 ???

ReplyJignesh.Parmar says:

September 8, 2011 at 4:20 pmIE-64(iv) State in case of transformers or switches or static condensers involving the use of more than2,275 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 fordraining 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 leakor escape from the tanks receptacles or chambers containing the same, special precautions shallbe 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 suchsub-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 whohave authority so follow Instruction of authorized person to sort out issue.

Reply

Pradeep Kumar Yadav says:September 14, 2011 at 9:57 amHi sir,

I am working in BHEL as a electrical engineer . Can you please tell me what is the minimumclearance required between 33 KV underground power cable and GAIL gas pipeline. kindly replyme soon with some evident documents .

Matter Urgent

Pradeep Kumar yadav


September 14, 2011 at 4:50 pmAs 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 laidwithin the cable reservations. The following minimum clearances shall beobserved for respective service lines at crossing points. Such crossings may not be permitted ifthe cables 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 belowEHV cable level)=1000 mm

Drainage= 500 mm below the cable or200 mm above the cable protective tileGas pipes= 600 mmTelephone lines =200 mm above the cable protective tile

LV / 11kV cables 150 150 mm above the cable protective tile

ReplyPradeep Kumar Yadav says:

September 15, 2011 at 8:51 am

sir,



sir,

In my case the GAIL Gas line is approximately 1000mm below the ground and I amplanning to keep power cable 500mm inside PVC conduit below the Gas pipeline, I amunable 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 amAs per IS 1255

Clearances The desired minimum clearances are as follows:Power cable to power cable Clearance not necessary;however, larger theclearance, better would be

current carrying capacityPower cable to control cables : 0.2 mPower 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 3VOLTAGE MINIMUM DISTANCE METERS

380/220 volt 0.520 kilo volt 163 kilo volt 1.5

Henri Botha says:June 5, 2012 at 1:48 amWater pipeline to be 500mm from an 11kv MV cable?Is this assumption correct?

Can you please advise?

Regards

Henri BothaElectrical SuperintendantUlan West Mines Australia

amin ur rashid khan mayo says:September 16, 2011 at 1:45 pmmy 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 payingpenalty against LPF,how ever the kvarh showing,consumer using ground earth system. noticesissued to consumer for improving pf but in vain, do i proceed further if u agree. thank you



Replyantony says:October 19, 2011 at 7:22 am

I have a 500kva generator supply a 53km 33kV line with over 8 transformers along differents pointsof the load centres. th line is built soundly but has a problem of tripping the generator everytime. ihave been told its a problem of capacitance build up. can you kindly explain what could be the

problem with this line

antony

Replyantony says:October 19, 2011 at 7:24 amcan 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 pmHow maney minimum vertical clearance should be adopted for highway construction under powerline 400 kv.

ReplyJignesh.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 amcan a portion(300mtr span) of 400kV HT overhead line be replaced with underground cable on theoutskirts 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 amHow to decide the busbar size & how to decide the electrical clearences between phase to phase,phase to earth?

Replysanjay says:January 20, 2012 at 11:43 am

What is the exact difference between precision & accuracy?

Reply

prashant agrawal says:



January 22, 2012 at 4:48 ami 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.

ReplyNazeer says:July 25, 2012 at 6:23 amHi 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.

Replygajendiran says:February 8, 2012 at 3:48 ami need clarification, minimum distance from Transformer HT side to fencing

Replyvikas says:February 8, 2012 at 3:11 pmsirmy name is vikas working as surveyor in aptransco.sir i can do towerspotting manually .can i have any indian software for the tower spotting .pleaserefer

Replygajendiran says:February 13, 2012 at 11:56 amsir,

im gajendiran working as Electrical engineer in L&T.

minimum clearance between 22KV HT cable & LT ,LV cable in UG system

ReplyJignesh.Parmar says:February 16, 2012 at 5:05 pmPlease refer Abstract of CPWD and IS code of this Blog

ReplyEjaz Ahamed says:February 15, 2012 at 6:20 amHi sir,Could you please tell me the minimum space required around an indoor substation(33/415v) so asto attain fire safety requirements?

ReplyNaveen says:February 25, 2012 at 2:25 am



pls refer any book for substation design. I want Know details of SAS also.

Reply

Nikita says:February 26, 2012 at 6:02 pmHi,I am interested to buy an apartment near electrical transmission line (it looks like very very highpower 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?

ReplyAr M S Devarmani says:February 27, 2012 at 5:22 amPlease 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 amwhy we have maintain phase to phase clearance? if we didt maintain the clearancewhat willhappen?

Meganathan.A

ReplyJignesh.Parmar says:February 27, 2012 at 4:29 pmR u Electrical engineer !!!

Replykarthick says:

February 28, 2012 at 5:48 pmy upper & lower lips have some gap for eating

ph to ph clearance to aviod short circuit of phase to phase

ReplyMarcos says:

June 25, 2012 at 12:17 amFor obvious reasons.But there are indicated minimun values.The real minimun I believe should be checked against line reactance and other parameters, asthere 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



manoj arora says:March 23, 2012 at 3:56 pmHi Friends , Need ur advice ..

What should be the minimum vertical clearance between 11 KV HT ABC(3*35+75 sq mm) and 415LT ABC(2*16+25 sq mm) . Both the cables are crossing at one point ( Used for overhead distribution

system)

Thanx in advance

Waiting for responseManoj Arora

ReplyJignesh.Parmar says:March 23, 2012 at 5:52 pmAs Per IE Rules:Low/Medium Crossing to 11KV to 66KV= 3.05 Meter

Replymanoj arora says:

March 24, 2012 at 3:00 amBut 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 amwaiting for advice

ReplyJignesh.Parmar says:March 25, 2012 at 10:36 amPower 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 amdidnt 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

Replymuthukumaran says:March 27, 2012 at 4:16 am

Hi could you share What does the IEC mentions about the clearanace between phase to ground and



Hi could you share What does the IEC mentions about the clearanace between phase to ground andphase to phase ,For the variuos voltage levels?

Replysudarshan says:

March 28, 2012 at 2:10 amWe are going to installing in 11kv/420 transformer opencast mine in one shed.what is safe distancefor installing control panels and starters? what are safety we have to follow /

ReplyAbhishek Sarkar says:March 28, 2012 at 6:26 pm

what is the minimum ground clearance required for a low tension aerial bunched cable line?

ReplyHemant Sali says:April 4, 2012 at 6:41 amDear 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.

ReplyJignesh.Parmar says:April 4, 2012 at 3:43 pmThanks for highlighting Typing ERROR.

Reply

Hemant Sali says:April 8, 2012 at 9:44 amI had also mentioned IE Rules have been replaced with the regulations as, safety measuresfor Generation Transmission Distribution and Use of Electrical Power have so far beenregulated by Indian Electricity Rules 1956 and as amended time to time. These Rules weremade as per the Section 37 of Indian Electricity Act 1910 by Central Electricity Board. Afterenactment 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 undersection 53 of this Act are madeAs 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 relatingto safety and electric supplynotified 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 IE



Dear Completely Agree with You. But Still Lots of Engineer confused between IE Act and IERule and its revision (Further Grid Code,supply code,GERC for gujarat).I have also faced aproblem in one Interview in Power distribution company. I could not succeed to explaininterviewer about IE Rule and IE Act. Interviewer himself was confused between IE Rulesand 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, sewagepipe lines is there any reference in IEC or IEEE

Replyram says:April 14, 2012 at 12:26 pmplease send me notes regarding testing,commisioning,operation & maintenance of electrical

equipments for132 kv s/s

ReplySantosh Behera says:April 20, 2012 at 6:20 amDear JigneshCould 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 fromelectomagnetic induction.

Thanking you

Santosh Behera

ReplyJignesh.Parmar says:April 22, 2012 at 1:31 pmAs per IE Rules & CPWD Noms: Horizontal Clearance of HT Line from Building is 2 Meter for 33KV and Add 0.3 Meterfor Next each 33KV So for 440KVIt is 5.9 Meter.

ReplyTahid Alli says:May 3, 2012 at 2:48 pmhi ,sir i am satyam want to know about all ie rules in internet .plz help me.i am not belongs toelect. engg.

ReplySenthil says:June 19, 2012 at 4:44 pm



Hi Mr. Jignesh Parmer,

I intend to purchase an apartment near a 40 feet HT line (voltage unknown, probably 33kV), whichis located 7 meters away from the building. Is it safe to buy the house? What are the ill effects ofhaving HT line near residential house? Could you please advise?

Thank you In advance

Replyakhilesh sharma says:June 21, 2012 at 5:46 pmsir, 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 amwhat is the minimum clearance between 100 mm water pipe and 11kv cableJulian

Replyram chandra says:

July 5, 2012 at 7:46 amsir.Two lines ( one 400 Kv and other 200 KV) are parallel to each other, is any criteria for Maritainminimum distance between two Parallel line.


Please Refer Abstract of IE rules and CPWD of this Blog.

ReplyCHANDRASHEKHAR M says:July 6, 2012 at 4:04 pmHI ,

Sir, MY QUERY REGARDING 22KV LINE , LINE START FROM RECEIVING STATION AFTER22 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 onTake off structure.

ReplyCHANDRASHEKHAR M says:July 6, 2012 at 4:12 pm

SIR,



SIR,FOR 22 KV FEEDING D/C OVER HEAD LINE WHAT SHOULD BE THE CLEARANCE FROMGROUND , PHASE TO PHASE AND PHASE TO EARTH

Replymahesh.b says:

July 13, 2012 at 8:36 amSIR PLEASE LET ME KNOW THE GROUND CLEARENS OF 66KV LANE PASSING ABOVETHE STREET AND THE CONSTRUCTION DISTANCE (GROUND CLEAREANS ETC)


It is already given On BlogJust Read Abstract of IE Rule and CPWD.

ReplySubhendu Mohanta says:July 20, 2012 at 11:57 amDear 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)

ReplyShailesh tripathi says:July 21, 2012 at 6:10 amHai sir please tell what is the minimum clearence between 11 kv HT line & 415 v LT line at thecrossing.

ReplyJignesh.Parmar says:July 21, 2012 at 2:41 pmRefer Abstract of IE Rules and CPWD of this Blog..

ReplyLalan says:

July 28, 2012 at 1:13 amSir, can u please tell me is there any EMF (Electro Magnetic Field) norms in India to be followed forerecting 33 KV overhead line, coz im following all norms as per IE 1956, but still Civil Court haveinjunction-ed my n stopped my line work

Replyjoshthangiah says:

July 29, 2012 at 7:15 amsir, What is the minimum distance clearance from the Diesel tank to EB Sub station Forgiving NOC to install 15000 litres Diesel tank in a private company which is very next to EB substation ..can we allow..if there is an electical burst or disaster in the EB sub station will it affectthe diesel tanks of the pvt company



ReplySYUKRI says:August 12, 2012 at 1:45 pmHI Sir

Need to know the status overhead laying if HV and LV lay in the same pole, that is still undersafety hazard or there is a dispute act installation,,,,need comment,,,,thanks

ReplyJignesh.Parmar says:August 12, 2012 at 2:09 pmDepend 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.

ReplyKapil says:August 17, 2012 at 9:33 amSir,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.

ReplyRsy Buxton says:September 5, 2012 at 2:53 pmPlease 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.

ReplyJignesh.Parmar says:September 5, 2012 at 3:05 pmGround clearance,Street Clearance,Side walks for Power line for various voltage and Code isalready 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 feet1Meter=3.28Feet.

Replylordakash1989 says:September 6, 2012 at 8:49 amI want to know the distance b/w two conductor of 400 kv transmission line.

Reply

Ravi says:September 7, 2012 at 6:18 pmSir 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 itmakes 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 soonRegards- Ravi

ReplyJignesh.Parmar says:September 8, 2012 at 2:53 pmRavi,It is already given in the post of Safety Clearance 1to4 by various Code and Standard

ReplyManish Shende says:September 11, 2012 at 4:52 pmHello 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 regardsManish Shende

Reply

Imam Jaffer says:September 25, 2012 at 12:48 pmDear Mr Jignesh Can you tell me Minimum clearance requiredbetween HSD 16000ltrs to Under ground HT cable of 33kv.

ReplyJignesh.Parmar says:September 25, 2012 at 2:51 pm

Please refer Post of Electrical Safety Clearance Part-1 to Part-6

Replysunil says:November 6, 2012 at 5:42 ami found voltage between R-phase to neutral was 300V , between Y-phase to neutral was 315V andbetween 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.

ReplyJignesh.Parmar says:November 6, 2012 at 4:58 pmYou will not get any difficulty in three phase load but get serious voltage various ion betweenPhase 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..

Replyanil says:November 22, 2012 at 9:23 am

hi jigneshnice to see you running such a useful blog. a 66Kva line passes thru my commercial plot with twopoles inside the boundary. i propose to build a shed . can u please suggest me the distance as to howfar from the pole end can i start my shed walls and also how far can the slope of shed shud be fromthe wires???thanx

Replysaroj says:December 10, 2012 at 12:27 pmwhat is the vertical electrical clearance to petrol pump

ReplyNachiketa says:December 11, 2012 at 12:02 pm

Hi Jignesh

The minimum clearance laid down in the CEA regulations, 2010 does apply on industrial Unitsalso? 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 pmHi . Can any one explain the basis from which electrical clearances are derived i guessthey have been derived from dielectric strengths of air.can any one elaborate this pls???


December 28, 2012 at 1:56 pmYes definitely It depends on dielectric strength of Air..

ReplyAbhijit says:January 8, 2013 at 8:16 pm

Sir,



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.

ReplyTushar Patel says:January 10, 2013 at 6:45 pmDear Sir,

Recently ive 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 12.30ftspace between the house and the H. T. Line.

I would like to knowwhether 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.

ThanksTushar

Replyram says:January 14, 2013 at 8:28 amDear sirI am planing to purchase 1 plot near HT lines. Distance between ht line & plot is 15m . Kindlysuggest me is there any problem to helth if i built home at that place

Replysam says:March 6, 2013 at 9:06 amhello sir,I am doing a project in simulation. I want to know the distance between the lowest conductor oftransmission line (carrying 345kV) and the ground.

ReplyAnkur says:April 11, 2013 at 5:34 amHi,

Could you please provide minimum electrical clearance required between phases of 11 kV Air breakswitch. A copy of supporting document would be appreciated.

Reply



Uttam Dutta says:

April 30, 2013 at 4:20 amCan you please tell me what should be the gap between LV panel to back side wall and sideclearance with anothe LV pannel. and please tell me the same thing with HV pannelHere LV means 415 V and HV means 6.6KV


April 30, 2013 at 2:12 pmPlease refer old post of this Blog..Safety Clearance Part 1 to 5

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gajen says:May 1, 2013 at 12:34 amfor LV panel 300MM OR 1000MM (ACB PANEL OR APFC)

HV 1200 MM

ReplyO.P.Bansal says:April 30, 2013 at 12:54 pmPl. intimate me horizontal clerence for 400 kV and 220 kV transmission lines

ReplyJignesh.Parmar says:April 30, 2013 at 2:12 pmPlease refer old post of this Blog..Safety Clearance Part 1 to 5

ReplyO.P.Bansal says:May 1, 2013 at 8:59 amCan a 400 kV transmission line run in parallel to 220 kV transmisin line with a disatnce of 5.94 mtr.between their condcutor.

ReplyDharmesh says:May 15, 2013 at 5:58 amHI Jignesh,Can u please tell me the Dos & Donts for developing the Land by a Developer after layingunderground 66KV Cable?

ReplyDharmesh says:May 21, 2013 at 12:09 pmDear Jignesh, please answer the above question . Id be very thankful to u..

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Chirag Gandhi says:May 31, 2013 at 7:10 amDear 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 linesand give the refrence file so I can so to other and in IE rules it is given? If yes than plz. provide it tome.

Thanks a Lot.Chirag Gandhi

Replyrameshan says:July 25, 2013 at 8:22 pmsubsequent to Indian Electricity Act 2003, the basis of Electrical safety also changed wrt said act inplace of IE Rule 1956 or rules prior to 2003. Please detail the clauses/acts wrt to Indian Electricity act2003.

ReplyGurudatt says:July 26, 2013 at 7:54 am

Respected Sir,

Please clarify whether Emergency Door /Window can be placed near Transformer yard.

Regards,Guru

Replypankaj says:July 26, 2013 at 2:46 pmht clearnce

ReplyFernando 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? Thereare 2 HT lines running from East to West one 110000volts and the 2nd one is 230000 volts in oursite. What is the ground clerence required.

ReplyShatrughan Yadav says:August 3, 2013 at 11:25 amWhat is the minimum allowable residual AC and DC voltage for operation /maintenance ofelectrical circuit??It is the voltage that persists in the phase after disconnection of the equipment!!!



ReplySub Division officer M S E D C L says:August 21, 2013 at 4:45 pmPlz give an idea of state highway crossing 11 kv and Lt linevertical and horizontal clearance from ground .and whom should shift HT/LT lines along the roads

Replyravipvr05 says:August 22, 2013 at 2:23 pm

For 33 kV1. What should be the distance between two poles (Rail pole)2.What is the calculation for conductor sag between two polesThere are any standard specifications for these??

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