Continued from part 2 – Electrical Safety Standards for LV/MV/HV (Part-2)
Content
Standard: Northern Ireland Electricity (NIE), 6/025 ENA
Code: Indian Electricity Rules / Central Electricity Authority
- Right of Way Clearance (As per GETCO Standard)
- Minimum clearances between Electrical Lines crossing each other
- Permissible Min ground Clearance of Electrical Line
- Clearance for Telephone line Crossings Power Line
- Vertical Clearance between Electrical Line and railway tracks
- Clearance from Buildings to low, medium & high voltage lines
- Clearance above ground at the lowest conductor
- Vertical Clearance at Middle of Span
- Safety Clearance from Live Part in Outdoor Substation
- Lying of Telecommunication Cables with Power Cables (>33 kV)
- Safe approach limits for people
Code: Indian Electricity Rules / Central Electricity Authority
Right of Way Clearance (As per GETCO Standard)
KV | Min ROW |
66 KV | 18 Meter |
132 KV | 27 Meter |
220 KV | 35 Meter |
400KV | 52 Meter (Single Circuit) |
400 KV | 48 Meter (Double Circuit) |
Minimum clearances between Electrical Lines crossing each other
Voltage | 66 KV | 132 KV | 220 KV | 400 KV |
66 KV | 2.4 Meter | 3 Meter | 4.5 Meter | 5.4 Meter |
132 KV | 3 Meter | 3 Meter | 4.5 Meter | 5.4 Meter |
220 KV | 4.5 Meter | 4.5 Meter | 4.5 Meter | 5.4 Meter |
400 KV | 4.5 Meter | 5.4 Meter | 5.4 Meter | 5.4 Meter |
Permissible Min ground Clearance of Electrical Line
KV | Ground Clearance | Over National Highway |
66 KV | 6.1 Meter | 8.0 Meter |
132 KV | 6.1 Meter | 8.6 Meter |
220 KV | 7.0 Meter | 9.8 Meter |
400KV | 8.8 Meter | 10.8 Meter |
Clearance for Telephone line Crossings Power Line
KV | Clearance (Min) |
66 KV | 2.4 Meter |
132 KV | 2.7 Meter |
220 KV | 3.0 Meter |
Vertical Clearance between Electrical Line and railway tracks
KV | Clearance (Min) |
66 KV | 14 Meter |
132 KV | 14.6 Meter |
220 KV | 15.4 Meter |
400 KV | 17.9 Meter |
Clearance from Buildings to low, medium and high voltage lines
Voltage | Description | Distance |
Low & Medium Voltage | Flat roof, open balcony, verandah roof ,When the line passes above the building a vertical clearance from the highest point | 2.5 Meter |
Low & Medium Voltage | Line passes adjacent to the building a horizontal clearance from the nearest point | 1.2 Meter |
Low & Medium Voltage | Line passes above the building a vertical clearance | 2.5 Meter |
Low & Medium Voltage | Line passes adjacent the building a Horizontal clearance | 1.2 Meter |
11 KV to 33 KV | Line passes above or adjacent to any building or part of a building | 3.7 Meter |
Above 33 KV | Line passes above or adjacent to any building or part of a building | 3.7+(0.3 for every additional 33 KV ) |
Up to 11 KV | The horizontal clearance between the nearer conductor and any part of such building | 1.2 Meter |
11 KV to 33 KV | The horizontal clearance between the nearer conductor and any part of such building | 2.0 Meter |
Above 33 KV | The horizontal clearance between the nearer conductor and any part ofsuch building | 2.0 + (0.3 for every additional 33 KV ) |
Clearance above ground at the lowest conductor
Voltage | Description | Distance |
Low & Medium Voltage | Across a street | 5.8 Meter |
High Voltage | Across a street | 6.1 Meter |
Low & Medium Voltage | Along a street | 5.5 Meter |
High Voltage | Along a street | 5.8 Meter |
Low & Medium Voltage | Elsewhere than along or across any street | 4.0 Meter |
High Voltage | Elsewhere than along or across any street | 5.2 Meter |
33 KV & EHV | Clearance above ground(Add 0.3 Meter for every 33 KV Volts in 5.2 Meter) | Min 6.1 Meter |
Vertical Clearance at Middle of Span
Span | Vertical Clearance (At Middle of Span) |
200 Meter | 4.0 Meter |
300 Meter | 5.5 Meter |
400 Meter | 7.0 Meter |
500 Meter | 8.5 Meter |
Safety Clearance from Live Part in Outdoor Substation
KV | Safety Working Clearance |
12 KV | 2.6 Meter |
36 KV | 2.8 Meter |
72.5 KV | 3.1 Meter |
145 KV | 3.7 Meter |
220 KV | 4.3 Meter |
400KV | 6.4 Meter |
800 KV | 10.3 Meter |
Lying of Telecommunication Cables with Power Cables (>33 kV)
Cable | Min. Distance |
Power cable of voltage exceeding 33 kV shall be laid | Min 1.2 Meter depth |
Underground telecommunication cable shall be with underground power cable of voltage exceeding 33 kV. | Min 0.6 Meter Separate from Power Cable |
Safe approach limits for people
Voltage | 214V to 415 KV | 11KV | 33KV | 66KV | 132KV | 275KV |
Person using manually operated tool | 1.3 Meter | 2.0 Meter | 3.0 Meter | 4.0 Meter | 5.0 Meter | 6.0 Meter |
Person using power operated tool | 3.0 Meter | 3.0 Meter | 3.0 Meter | 4.0 Meter | 5.0 Meter | 6.0 Meter |
i have my own land & i had applied for Environment clearance for mining in my land. 1 tower of 220 comes in my land. so what are the norms for tower line in my land. please guide me that from tower how much meter land i will not able to do mining activity. also provide me your copy of norms of your deparment.
thanks.
Fronm where did you took National Highway clearance ? please mention any Act/ Rule No. / The then CEA Guidelines? please revert back on e mail or phone no 08554994939
What minimum clearances (outer distance) should be maintained in an indoor substation having 11 KV HT and 415 V LT panels as per indian electricity rules/ CEA in following cases :
(i) Between HT panel and LT panel
planning to buy a house but it is only 5 m away from 33kV line, is it safe???
Hello sir,
132 kV line perposal over my land.i want to know what is the line clearance from house to line distance.
Also we have not get any notice for to this.and tower plenth in my land so can we stop tower plenth work from my land.
Can you breif me asap.
sir i would like to know what should be the minimum distance between 11 KV XLPE UG cable and LT UG cable.
Dear Sir
We are planing to design a incomer of 415V MCC which is fed from 415V PCC having 1.1Km Distance. The Power to be fed by LV 3.5 Core cable. Kindly tell us the basis of selection and design.
Regards
Vinod Kumar
सर मेरे घर के 30 feet distance से 765kv ki line गई है मै वहा रह सकता हू के नही एक दीन अचानक मेरे घर के सामने वाली low tension line pe वो high tension का suply आ रहा था aur आग भी गिर रही थी मेरे घर के दीवार मे भी current आ राही थी मै क्या करु मेरी दुसरा घर बनाने की परीस्थिती नही है मेरा परीवार डर गया है मुझे आपसे फोन पर बात करनी है
Dear sir.
I would like to know about the safety procedure of 11kv line, here in front our fully residential area.11kv line 10 feet away from ftom my house.so please suggest me what procedure to sfit away this 11kv supply line from our area.below 11kv line there also use 440 & 220 line.request to give a solution..
Dear Sir
I would like to know about the safety distance between 132 Kv overhead line and Insulated 33kv overhead line if passing down through 132 Kv line…
and also let me know how to find out the safety distance between two line, there is any basic design criteria if any..
Regards
Rahul
What is the voltage limit in Indai for the below:
Low voltage LT-
Medium voltage MV-
High voltage HT:
Extra high voltage EHT;
Low voltage LT- 250V
Medium voltage MV-650V
High voltage HT:-33KV
Extra high voltage EHT;above 33KV
What minimum clearances (outer distance) should be maintained in an indoor substation having 11 KV HT and 415 V LT panels as per indian electricity rules/ CEA in following cases :
(i) Between HT panel and LT panel
(ii) Between HT panel and wall
(iii) Between LT panel and wall
(iv) Between two LT panels/ battery charger
can I run 11kv xlpe armoured AL cable through basement adjacent to ceiling in a high rise appartments
Dear Mr Jignesh Parmar, could you advise the safety distance for cranes working close to 400kv overhead transmission line?
Desr Sir,
I want to know from were you have taken Permissible Min ground Clearance of Electrical Line vertically along NHAI road crossings. If there is any circular regarding it u can share it please.
Thanks
Dear Sir,
I want to know about permissible Min ground Clearance of Electrical Line from which reference it has been taken.
When a 220kV line is to be constructed parallel to existing 400kV DC line. what the clearance we have to maintain?
i have a plot near 132 KV line.You have mentioned safe approach limit for people as 5m.Please confirm this is under which clause of IE rules. i presume it means that aperson living in the plot has to maintain a minimum distance of 5m for all practical purposes. Pl clarify is it the horizontal distance from last line after considering deflection etc. What is max deflection possible. Safe distances are to be considered for building are after taking into view the max wind speed deflection.An early reply will be really beneficial. Thx.
Please i need your advice what is the clearance between the LV cables and Mechanical services when they are crossing
example; As per the regulation the LV depth is 600mm and and for irrigation pipe is 400mm, the consultant his requist to provide duct and clearance 200mm is it ok
please i need to follow the requirement of KM and if there’s in QCS or NFPA
R/sir,
Please tell me One HV 220kv line passing through our plant we need a construction of shed near tower , 1.how much distance has to maintain?
2.magnetic waves coming in poles what to do?
3. Is it safe to construct?
4. what major precaution has to take?
I have purchased a piece of land near the highest power electric line passing and I want to built a hotel therein. What are the rules
Dear sir plz tell me what is the clearance between phase to phase in 33 kV HT panel
Surveyor
Mr. Parmar,
could you please tell me the minimum right of way requirements of 400kv underground double circuit line. if it is 48m for double circuit overhead line as per your article, what will it be for UG double circuit line.
is the overhead to underground conversion possible /advisable in case of 400kV system?
thanks
Kapil Bhatt
Sir,
A 110 KV line is passing over my plot.I want to construct a shed of 3 m height from the ground under the line .Is it allowed?
Dear sir,
WE WILL ERCTION FOR TOWER CRANE .NEAR OHL 132 COING ON HOW MUCH DITANCE REQUIRED.
Sir,
On how much closer to 11kv over head line a man can get shock if u go close to it.
R/Sir
Here in front of my home passing 11kv line,4-5 feet away from front of building, so please suggest me what procedure to sift away this agricultural 11kv supply line from our residential society.please give reply sir.
no
Sir,
our industry is that of Petroleum industry. in front of the main gate, there is a live 33 kv HT line going overhead which poses a risk to the petroleum product carrying vehicles standing in parking. can you pease suggest specifications required for cabling of that line to minimise the risk
Dear Sir,
I would like to learnt from you regarding the ground clearance required on National Highways with Heavy loads passing in the route having a132KV line crossing over the road, may you please specficy me the clearance required and code related to it.
Thanks and looking forward to reading from you.
Sir, please tell me what are the different types of service supports and permissible span as per the IE rule
Hi Sir,
I have been reading and following this website for past 8 yrs and its been a saviour always. Kindly tell me the standard in IE which define the space clearance between a 33/0.433KV 100KV Aux transformer tot he building in a switching substation. Kindly revert. Awaiting for your response.
Regards,
Shivkanth Vijayan
How come we dont se any answers to questions above? Why should I bother asking one ?
Respected sir
What is the clearance strategy for 400 KV high tension lines? What is the clearance for Explosives storage from High tension wire?
Dear sir
In Two circuit 20kv lines how much is the Clearance Between two lines in different lines in one Foundation?
whether v can lay both ht and lt cable in a single cable trench ( RCC)
hello sir,
i have one question about the clearance between the 132/33KV substation to nearest petrol pump?
plz help me.
Dear Sir,
What max. distance we should maintain from 11 KV Sub-Station ( Customer) point of supply to VCB and Transformer as per Electricity rule? Please give us Rule No. also.
Sir, we are proposing to lay 20 pair armoured telephone cable along with 11kv HT UG cable in under ground at a depth of 1meter. Can we lay both in the same trench and if, what is the distance between them to be leave and what is the standards to be followed.
what should be the min distance between Phase to Phase and Phase to Earth for 11KV and 33KV system , while manufacturing of HT Panels.
Dear Sir,
Please send the DOs& DONTs at 33KV maintenance list to display in our factory.
Thanks&Regards,
Murali Tadi
exploring the knowledge about electrical power
Dear sir,
one 66 k.v line passing through company premises please advice what is the clearance between conductor and building and if under ground cable what is the digging depth and clearance
Want to know the safe distance for construction of wall from underground cable of 33KVA passing adjascent to my plot.
Thans and regards
Rohit
looking fore safety standards for buildings from a 66kv line…
HI Sir,
I would like to know that,
1) What is the range of several voltage like Low Voltage- From ….? to ….., High Volatge From……to….EHV from….to…..UHV from ….to…….i have searched this multiple time on internate but didn’t got stisfactory answer as ans is not same everywhere.
2)On what reference we segregate them.
3)What is LT, and HT, if LT for Low voltage and HT for High Voltage then EHT and UHT must exist.
Sir, i would like to ask what the safety rule/measures for common peoples for HT(11000 Kv) lines cross the main street of any village/ town, what the responsibility of electricity board to protect peoples if the power wire broken and comedown what should to do electricity board in that condition kindly explain
What should be the minimum vertical clearance from 132 K.V transmission line to 15 K.V.A / 40.K.V.A.415 volts, 50Hz. Diesel generator set.
Dear Sir,
The 132 KV power line are above the road.
could you please tell me about the danger zone for movement of vehicles and cranes
under the power lines .
Hi dear Jignesh Parmar
I have question from you.
we have a power network(132 kv) cross the road in our company. what is the Safe distance
between Power network cables(132 kv) and top of the vehicles for example crane’s boom?
so i want to know how much vertical meter should we consider from cables to ground?
also what is the standards?
Hello Sir,
I have a plot near 132 KV line.
The 132 KV line is (40 foot/13 meter) away from my plot .
Can you Please clarify Safe distances(distance from 132 KV to my plot & as well as the hight of building) are to be considered for building are after taking into view the max wind speed deflection.An early reply will be really beneficial.
Your support/suggestions are highly appreciated and welcome
Hi sir,
The 132 KV line is up the road and i just meant about going the vehicles under the 132 KV line. so i want to know the safe distance from 132 KV line. not about buildings because we there is no any buildings under the network.
best regards
calculation for minimum clearance on existing non electrifed routes from rail level for above 11KV & UPTO 33 KV is given 10860mm
We have 100kv line in switchyard substation. We now procuring new isolator for it having min voltage – 132kv & Max voltage – 145kv. What should be clearance from ground of live conductor?
In IE rule it mentioned 6.1 mtr for OH lines crossing road, Is it same for switchyard installation?
waiting for your reply
A 11Kv line is passing alongside of our access way.
Now, this access passage has got filled with slushy soil,water slippery due to rainfall.
It has got continous men , material movement thru trucks, transit millers,jcb, hydra.
It is near about 500mtrs sterch having width 3mtrs apprx.
Is it safe for use??
earliest reply would be most beneficial.
Sir, a new transmission line of 400kv is passing over my home….it is not commissioned now….is there any possibility of interruptions with my mobile phones,television and other electronic gadgets..when the line is commissioned?
Dear Sir,
we are building a new campus of IIT Indore. There is over head line of 132 KV crossing the approach road, whose sag has increased due to which the distance between ground and transmission line had decreased. Kindly, suggest the protective measures.
Your endeavor in this regard will be highly appreciated
Thanking You,
Gaurav Saxena.
JE Electrical
IIT Indore
i have a plot near 132 KV line.You have mentioned safe approach limit for people as 5m.Please confirm this is under which clause of IE rules. i presume it means that aperson living in the plot has to maintain a minimum distance of 5m for all practical purposes. Pl clarify is it the horizontal distance from last line after considering deflection etc. What is max deflection possible. Safe distances are to be considered for building are after taking into view the max wind speed deflection.An early reply will be really beneficial. Thx.
I am an electrical engineer.Please clarify the source regarding figures distances of safe approach for people. I request Mr. jigu Parmar to send me the reply at my email address or give his phone no. so that i can discuss with him.Thx
Sir
Can you let me know the standards for clearances for 132 KV underground sub stations.
i wnt indian electricity rule
pls help me
Thanq
Your information was very useful to me..
I will be glad to you,If you send your contact no on my email id for further clarification of doubts.
Thanks & Regards
Muneer
Dear Sir,
I just purchased a land where i am now building a two story bedrooms for residential, but i just find out that there is a 220 kv electrical line passingabove my parcel. Can you please advise more on safety distance to be maintained for my little family that i cherish, i will put plastic roof for isolation but i need a better advise from you.
please respond on my email.
Thanks and looking forward to reading from you.
Dear Sir
Please tell me I am living beside at apartment (20 Flats ) and also Transformer near to my house , Can You please tell me Magnetic waves are harm to us, and How much safe distance between transformer and building Wall and tree and Set back for all sides as per Indian Electricity Latest Rules
Sir,
In safety point of view, what minimum distance will be maintained between the residential house and electric transformer as per the rules.
Thank you for this and other parts.