Continued from part 2 – Electrical Safety Standards for LV/MV/HV (Part-2)
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)
|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
|66 KV||2.4 Meter|
|132 KV||2.7 Meter|
|220 KV||3.0 Meter|
Vertical Clearance between Electrical Line and railway tracks
|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
|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
|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|
|800 KV||10.3 Meter|
Lying of Telecommunication Cables with Power Cables (>33 kV)
|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|
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?
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.
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
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
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?
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?
WE WILL ERCTION FOR TOWER CRANE .NEAR OHL 132 COING ON HOW MUCH DITANCE REQUIRED.
On how much closer to 11kv over head line a man can get shock if u go close to it.
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.
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