Electrical Safety Clearance (Qatar General Electricity) (Part-1)
August 8, 2012 27 Comments
Standard: Qatar General Electricity & Water Corporation
Minimum Safety Clearance of Pipelines from Electrical Tower:
|
Description |
Voltage |
|
|
33KV/66KV/132KV |
220KV/400KV |
|
| The right of way (ROW) (widths on either side of the center line of overhead transmission lines ) |
25 Meter |
50 Meter |
| Other than the roadways and boundary fences of security establishments any temporary or permanent structures / buildings, parapet walls, |
Not within 25 Meter |
Not within 50 Meter |
| With All Underground services crossing the way leave (from the nearest tower foundation) |
35 Meter (Min) |
50 Meter (Min) |
| The nearest side of the road reservation to the nearest tower foundation |
25 Meter |
35 Meter,50 Meter |
| The pipelines (water, oil/gas etc.) crossing (respectively away from the nearest base of tower leg). Pipe-lines shall not be laid parallel to the overhead line within the limits of a way leave (ROW). |
25 Meter (Min) |
35 Meter(Min) ,50 Meter(Min) |
| Cables crossing the transmission lines way leave (ROW) respectively away from the nearest base of tower leg. |
25 Meter |
35 Meter,50 Meter |
| Foundations and civil structures (Temporary or permanent) will not be permitted in the close proximity to the cable circuit. A minimum horizontal distance from such structures to the nearest edge of the cable trench shall be observed |
Min 1.5 Meter |
Min 1.5 Meter |
Clearance among Electrical Line-Telephone- Water-Sewerage -Gas Line
|
Service |
Vertical Clearance(Min) |
| Water Line (to cross below EHV cable level) | 0.5 Meter |
| Sewerage Mains (to cross below EHV cable level) | 1.0 Meter |
| Drainage Mains (to cross below EHV cable level) | 0.5 Meter |
| Gas pipes | 0.6 Meter |
| Telephone lines | 0.5 Meter |
| LV / 11kV cables | 0.5 Meter |
Safety Clearance for Excavation of Land :
|
Type of Excavation |
Distance |
| Use of heavy mechanical excavators (other than hand operated pneumatic jack hammers) or driving sheet piles | Not less than 3 Meter from the edge of cable, cover, cable joint |
| Heavy machinery engaged in the civil construction or road works | operating load/thrust/ weight will not be applied directly on the cable installation |
| Trench excavations parallel to the cable installations | Minimum separation of 1 Meter to the nearest edge of cable tile |
| Laying of metal pipes over a long distance parallel to cable | Not permitted unless the Step and Touch Potentials at any point of the pipe line do not exceed 65 Volts. |
(A) Inside Towns
Distance between Tower’s foundation to Pipeline in parallel and intersections.
|
Voltage |
Min Distance |
|
380/220V |
0.5 Meter |
|
20KV |
2 Meter |
|
63KV |
7 Meter |
|
132KV |
10 Meter |
|
230KV and Above |
20 Meter |
Distance between underground power cables to wall of gas pipelines in parallel routes.
|
Voltage |
Min Horizontal Distance |
Min Vertical Distance |
|
380/220V |
1 Meter |
0.5 Meter |
|
20KV |
2 Meter |
1 Meter |
|
63KV |
3 Meter |
1.5 Meter |
(B) Outside of Towns:
Distance between Tower’s foundation to Pipeline in parallel and intersections.
|
KV |
Min Distance in Parallel Route (Up to 5 Km) |
Min Distance in Parallel Route (Above 5 Km) |
|
20KV |
20 Meter |
30 Meter |
|
63KV |
30 Meter |
40 Meter |
|
132KV |
40 Meter |
50 Meter |
|
230KV |
50 Meter |
60 Meter |
|
400KV |
60 Meter |
60 Meter |
Distance between overhead lines to gas pipelines at intersections.
|
KV |
Min Distance |
|
20KV |
8 Meter |
|
63KV |
9 Meter |
|
132KV |
10 Meter |
|
230KV |
11 Meter |
|
400KV |
12 Meter |
Distance between Tower’s foundations to gas pipelines at intersections.
|
KV |
Min Distance |
|
20KV |
20 Meter |
|
63KV and Higher |
30 Meter |
Right Of Way (R.O.W) From Roads:
|
Highway |
Distance |
| High Way : (38 meter from one side of Central Line of Highway) |
76 Meter |
| First Class State Road=(22.5 meter from one side of Central Line of Highway) |
45 Meter |
| Second Class State Road=(17.5 meter from one side of Central Line of Highway) |
35 Meter |
| Third Class State Road =(12.5 meter from one side of Central Line of Highway) |
25 Meter |
| Forth Class State Road=(7.5 meter from one side of Central Line of Highway) |
15 Meter |
General Electrical Safety Clearance:
|
KV |
Description |
Distance |
|
Up to 11 KV |
At points where the lines cross roads or railways |
Min 6 Meter Height |
|
Up to 11 KV |
parallel to roads the |
Min 5.5 Meter Height |
|
Up to 11 KV |
lines cross totally desert regions where no traffic is possible |
Min 5.5 Meter Height |
|
20 KV to 66 KV |
All Location |
Min 6 Meter Height |
|
Up to 11 KV |
Conductor Joint |
No joint shall be closer than 3 meters to a point of support |
| 33 KV & 66 KV |
Conductor Joint |
No tension joints shall be used unless specially approved. |
JIGNESH PARMAR
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boss can you all requirements with international standard
Please provide all your good information with international code reference
yes its good practice … btw any international code for reference …
Sir, may i know the clearance needed between 132kV underground power cable and gas pipeline (crossing). Any standard for this?
Thank u sir..nice and wonderful articles..am an Engineer from TamilNadu..God bless u ,abundantly..
what is the min distance needs to be maintained between 3×50 sq mm 33kV MV cable running parallel to gas pipeline . Both are laid underground in desert condition. we needs reference std/ codes such as IEC/NEC/Shell std etc.
are these values based on international standard or engineering practices
Dear Sir,
What should be the Clearance between Gas Pipe Line & Over Head Transmission Line Conductor.
Further do we require to put up any earthing mat over the Pipe Line.
Your input will be of immense importance to us.
Regards
J N C
sir
i searched cable crossing details in internet. many sites i visited but need full information is fully available only this site. thank you so much.
What is the minimum clearance between underground cable and a gas pipeline
What is the minimum Horizontal Distance clearance between 115 kV underground power cable in HDPE duct and a gas pipeline.
What is the IEC or NFPA Standard About it ?
Based on which indian standard you have given clearance between gas pipe line and UG cable? please clarify
What’s the minimum clearance required to maintain when MV cable 13.8KV is crossing with water pipe?