Electrical Safety Clearance-(IE/CEA) (Part-2)

 

Right of Way Clearance (As per GETCO Standard):

KV

Min ROW

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:

KV

Clearance (Min)

66 KV

2.4 Meter

132 KV

2.7 Meter

220 KV

3.0 Meter

 Vertical Clearance between Electrical Line and railway tracks.

KV

Clearance (Min)

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 & high voltage lines:

VoltageDescriptionDistance
Low & Medium VoltageFlat roof, open balcony, verandah roof ,When the line passes above the building a vertical clearance from the highest point2.5 Meter
Low & Medium VoltageLine passes adjacent to the building a horizontal clearance from the nearest point1.2 Meter
Low & Medium VoltageLine passes above the building a vertical clearance2.5 Meter
Low & Medium VoltageLine passes adjacent the building a Horizontal clearance1.2 Meter
11 KV to 33 KVLine passes above or adjacent   to any building or part of a building3.7  Meter
Above 33 KVLine passes above or adjacent   to any building or part of a building3.7+(0.3 for every additional 33 KV )
Up to 11 KVThe horizontal clearance between the nearer conductor and any part of such building1.2 Meter
11 KV to 33 KVThe horizontal clearance between the nearer conductor and any part of such building2.0 Meter
Above 33 KVThe horizontal clearance between the nearer conductor and any part ofsuch building2.0 + (0.3 for every additional 33 KV )

Clearance above ground at the lowest conductor:

VoltageDescriptionDistance
Low & Medium VoltageAcross a street5.8 Meter
High VoltageAcross a street6.1 Meter
Low & Medium VoltageAlong a street5.5 Meter
High VoltageAlong a street5.8 Meter
Low & Medium VoltageElsewhere than along or across any street4.0 Meter
High VoltageElsewhere than along or across any street5.2 Meter
33 KV & EHVClearance 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

400KV

6.4 Meter

800 KV

10.3 Meter

Lying of Telecommunication Cables with Power Cables (>33 kV).

Cable

Min. Distance

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 tool1.3 Meter2.0 Meter3.0 Meter4.0 Meter5.0 Meter6.0 Meter
Person using power operated tool3.0 Meter3.0 Meter3.0 Meter4.0 Meter5.0 Meter6.0 Meter