Vertical Clearance : The minimum height above rail level of the lowest portion of any conductor of crossing including guard wire, under conditions of maximum.

Table 1

Voltage

Category - A 9

Section electrical on 1500 V.D.C.)

Category - B (Section already electrified or likely to be converted for eletrified on 25 KV AC Systems)

Inside Stn. Limits (mts)

Outside Stn. Limits (mts)

Inside Stn. Limits (mts)

Outside Stn. Limits (mts)

Upto

Only by cable

Only by cable

Above 11 KV

13.28

11.28

15.28

13.28

Up to 33 KV

Above 33 KV

13.59

11.59

15.59

13.59

Up to 66 KV

Above 66 KV

13.89

11.89

15.89

13.89

Up to below 110 KV

For 110 KV

14.2

12.2

16.2

14.2

and 132 KV

For 220 KV

15.11

13.11

17.11

15.11

For 440 KV

16.63

14.63

18.63

16.63

Note : While calculating the above clearance railways HT lines running over the 1500 V.D.C traction structure in some sections have not been taken into consideration.

Voltage

Broad Guages

Metre and narrow guages

Inside Stn. Limits (mts)

Outside Stn. Limits (mts)

Inside Stn. Limits (mts)

Outside Stn. Limits (mts)

Up to 11 KV

Only by cable

Only by cable

Above 11 KV

10.6

7.62

8.84

6.4

Up to 33 KV

Above 33 KV

10.36

7.92

9.15

6.71

Up to 66 KV 

Above 66 KV

10.67

8.23

9.45

7.01

Up to below 110 KV

For 110 KV

10.97

8.53

9.76

7.32

and 132 KV

For 220 KV

11.89

9.45

10.65

8.23

For 440 KV

13.41

10.97

12.19

9.75

Note :

1) If the crossing is located on a metre guage or a Narrow guage likely to be converted to broad guage, clearances applicable to Broad guage shall be adopted 9Section 18-3).

2)  Station limits shall be taken to mean all tracks lying in the area between the outer most signals of a railway Section (Section 18-4).

3) U.G. cable pipe structure should be at 5 meters away from railway power support to be Located by Railway authority (Section 30-1).

4) The spun concrete pipe encasting cable under the tracks should be laid at not than 1 metre below the surface of formation level and upto a minimum distance of 3 meters from the nearest track either side (Section 33-1).