Electrical Safety Clearance (Qatar General Electricity) (Part-1)

ELECTRICAL SAFETY CLEARANCE (QATAR GENERAL ELECTRICITY) (PART-1)

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

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.

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

DISTANCE BETWEEN OVERHEAD LINES TO GAS PIPELINES AT INTERSECTIONS.

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.

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:

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.