HORIZONTAL CLEARANCE BETWEEN LINE SUPPORT AND HIGH WAYS

Sl.No

Type of Road

Width of Road in Meters (FT)

Clearance between Center of the road and support In metres (FT)

1

National highways

11.58 (38')

7.76 (25')

2

State Highways

9.75(32')

6.3(22')

3

Major District Roads

7.32(24')

5.49(18')

CLEARANCE OF OVER HEAD LINES CROSSING OR APPROACHING EACH OTHERS

Sl.No

System voltage of Existing line

High voltages up to 66 KV minimum

11 KV Clearance

132 KV in

220 KV Metres

1

Low medium volgates H.V EHV upto 66 KV

2.44

2.75

3.05

4.58

2

110 KV

2.75

2.75

3.05

4.58

3

132 KV

3.05

3.05

3.05

4.58

4

220 KV

4.8

4.8

4.8

4.8

CLEARANCES BETWEEN POWER AND TELECOMMUNICATIONS LINES

Sl.No

Particulars

Clearance between gurding wire and Tel. Com line MM (ft)

Clearance between power an Tel.com line in MM (ft)

1

up to 11 KV

1220 (4)

1525 (5)

2

33 KV

1220 (4)

1830 (6)

3

66 KV

1220 (4)

2440 (8)

4

132 KV

1830 (6)

2740 (9)

5

220 KV

-----

3050 (10)

Authority : Clause 7 & 8 on pages 14 - 61 of Technical reference Book

THREE CLEARANCES

Sl. No

Particulars

The Clearaces Required

Relaxation

1

33 kV lines

All growth with in 30 feet on eigher side of the line and all trees , which on falling will foul the lines.

In the case of betel topes all growth with in 15 feet on right side of the line

2

11 KV lines

All growth with in 20 feet on either side of the line and trees. Which on falling will foul the lines

in the case of betel ropes all growth with in 10 feet on eight side of the line

3

Rural 11 KV lines

Left to the discretion of the Departmental staff (Asst. Divisional Enginer and above)

Left to other discretion of the Departmental staff (A.D.E and above)

4

High tension and low tension lines in Distribution Schemes

Left to the discretion of the Departmental staff (Asst. Divisional Engineer and above)

Departmental staff (A.D.E and above)