Electrical Safety Clearance (Part-2)

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 & 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
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About Jignesh.Parmar
Jignesh Parmar has completed M.Tech (Power System Control), B.E(Electrical) from Gujarat University. He has more than 14 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 Deputy 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.

33 Responses to Electrical Safety Clearance (Part-2)

  1. thank you Mr. Parmar for this code

  2. Silambarasan says:

    Dear sir,

    First i would like to say great thanks to u..informations regarding electrical are very much useful for me and electrical engineers like me…i request u pls continue this sir..kindly separate the electrical notes area wise…pls release a book for standard electrical tips and notes .

    Thank you sir….

  3. Manish says:

    Thanks Jignesh – very useful article. Really enjoy reading all your articles. Please keep it up !

  4. Hemrajsinh D. Chudasama says:

    Wow, What a Data given by You Sir ! This data is very much usefull in Practical life. I realy appriciate this chepter of Safety clearance of line from various …….. . Thanks again.

  5. Thank you so much, Mr Jignesh.

  6. amin says:

    Thank u sir for useful information.

  7. S C Mehra says:

    I am getting a 4 storied house constructed thru a builder. can you please guide me the sizes of conductor that should be deployed depending upon load – like e te split ac, 25 lit geyser etc?

  8. Rajkumar says:

    Dear Sir am From Neyveli, i have constructed a 2 story house near 230 kv Transmission line, our building clearance is horizontal 3.8 Meter, from second floor terrace vertical clearance 5.5 Meter, measured by eye sight, 230kv tower is 60 meter from the building.

  9. Rajkumar says:

    Dear Sir am From Neyveli, i have constructed a 2 story house near 230 kv Transmission line, our building clearance is horizontal 3.8 Meter, from second floor terrace vertical clearance 5.5 Meter, measured by eye sight, 230kv tower is 60 meter from the building, is this distance is safe, please give me some conclusion or solution.

  10. aribrahim says:

    Thanks for sharing the information…. may I know how do they determine all those distances. Is there any study done. thanks

  11. Ganesha K says:

    Hi Mr.Parmar, thank you very much for information given, can you please advice some standard for Underground cable laying clearances to utility services like water gas, sewage etc? I am laying 66kV UG cable

  12. Vrajesh Gadaria says:

    Excellent useful 4 clearnce building railway roads

  13. bobo says:

    Special thanks!

  14. thet ngon says:

    I’ld like to know the minimum clearance of 230kv line & Transformer when transformer is passing trought under 230kV line.

  15. Leelavathi says:

    I would like to know the clearance of EHV line over national highways mentioned is as per which Notification? is it mentioned in any of the GOVT Gazzetes or NHAI notification or CEA Gazzete?

  16. Iyappan D says:

    Thanks for the information.
    please clarify that “can 220kV Power Line cross over 400kV line?”
    if it so then how and what are the precautions to be taken?
    if not possible then why?

  17. Lokesh says:

    Please clarify whether the IE Rule 1956 has been replaced by the CEA Regualtions, 2010

  18. I appreciate the efforts that you are putting down to help people with various electrical safety measures that they need to take care when they start laying wiring for new building constructions. Thanks for these points and sharing with us.

  19. Nipun says:

    Hi Jignesh, Thanks so much for the information. We have a HT line tower in our land and want to know the KV of that HT line. There are no boards or marks on the tower for any identification. Can you suggest any other way to find out the KV of the HT line.

  20. swaroop nagar says:

    what i understood that it is possible to construct a building within right of way of a overhead HT line if we maintain vertical clearance between top of building & OHT line. Is my understanding correct?

  21. R. C. Joshi says:

    I am having a stone mines.Nearby around 20 metre away passing 220 KV line. Can I run my mines as per rules. Blasting work is also carried out in our mines.

  22. widanarala says:

    Hello Mr.Parmar,

    Have you come across the occasions where the utilities define the Right of Ways(RoW’s) depending upon the structure type, i.e whether the structures are Lattice, I-shape or V-shape insulators, Pole type structures with insulated cross arms etc?

  23. sivaprakash says:

    RIGID BUS CLERANCE IN DIFFERENT VOLTAGES

  24. Nilesh Sayaji Dubal says:

    We would like to make building construction near 400 KV HT line. How much shall be spacing left from 400 KV
    tower center.

  25. Yadla says:

    Dear sir could u plz certain sugation . I build a single ster house under over head transmission lines so any problems … Plz tell sir

  26. Yadla says:

    Dear sir plz help me
    i build a house in future under the over head transmission lines so any problems faced

  27. Rajeev Kumar says:

    Sir,
    I have bought a residential plot in a pvt. Builder area. A 400 KVA line is located near my plot.
    Please tell me how much distance is required to be maintain by builder from 400KVA line as per norms. And from where this distance measured , from center of line or extreme conductor etc. whether road in front of my plot also have to be spared for that distance.

  28. Guru Ram Dass Nagar says:

    Read about you and feel
    you are great sir.

  29. Vivek Jain says:

    what is the difference between right of way and horizontal distance from the building

  30. neha says:

    sir please tell me the clear spacing between conductors in over head lines( for 11 kv,33kv and 132 kv)

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