safety clearance
TRANSCRIPT
Electrical Safety Clearance (Part-1)
Standard: Qatar General Electricity & Water Corporation
Minimum Safety Clearance of Pipelines from Electrical Tower:
DescriptionVoltage
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 Meter35 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 Meter35 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 installationsMinimum 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 TownsDistance 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.
KVMin 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 KVAt points where the lines cross
roads or railwaysMin 6 Meter Height
Up to 11 KV parallel to roads the Min 5.5 Meter Height
Up to 11 KVlines cross totally desert regions
where no traffic is possibleMin 5.5 Meter Height
20 KV to 66 KV All Location Min 6 Meter Height
Up to 11 KV Conductor JointNo 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.
Electrical Safety Clearance (Part-2)
Code: Indian Electricity Rules/ Central Electricity Authority:
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:
Voltage Description Distance
Low & Medium
Voltage
Flat roof, open balcony, verandah roof ,When
the line passes above the building a vertical
clearance from the highest point
2.5 Meter
Low & Medium
Voltage
Line passes adjacent to the building a horizontal
clearance from the nearest point
1.2 Meter
Low & Medium
Voltage
Line passes above the building a vertical
clearance
2.5 Meter
Low & Medium
Voltage
Line passes adjacent the building a Horizontal
clearance
1.2 Meter
11 KV to 33 KV Line passes above or adjacent to any building
or part of a building
3.7 Meter
Above 33 KV Line passes above or adjacent to any building
or part of a building
3.7+(0.3 for every
additional 33 KV )
Up to 11 KV The horizontal clearance between the nearer
conductor and any part of such building
1.2 Meter
11 KV to 33 KV The horizontal clearance between the nearer
conductor and any part of such building
2.0 Meter
Above 33 KV The horizontal clearance between the nearer
conductor and any part ofsuch building
2.0 + (0.3 for every
additional 33 KV )
Clearance above ground at the lowest conductor:
Voltage Description Distance
Low & Medium Voltage Across a street 5.8 Meter
High Voltage Across a street 6.1 Meter
Low & Medium Voltage Along a street 5.5 Meter
High Voltage Along a street 5.8 Meter
Low & Medium Voltage Elsewhere than along or across any
street
4.0 Meter
High Voltage Elsewhere than along or across any 5.2 Meter
street
33 KV & EHV Clearance 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 laidMin 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 tool
1.3
Meter
2.0
Meter
3.0
Meter
4.0
Meter
5.0
Meter
6.0
Meter
Person using power
operated tool
3.0
Meter
3.0
Meter
3.0
Meter
4.0
Meter
5.0
Meter
6.0
Meter
Electrical Safety Clearance (Part-3)
Standard: Northern Ireland Electricity (NIE), 6/025 ENA
Clearances of Electrical Line to Ground and Roads:
Description of Clearance0.4 KV 11 KV 33KV 110KV
220
KV400KV
Line conductor to any point
not over road
5.2
Meter
6.1
Meter
6.4
Meter
6.4
Meter
7.0
Meter
7.0
Meter
Line conductor to road
surface
5.8
Meter
6.1
Meter
6.4
Meter
6.4
Meter
7.4
Meter
8.1
Meter
Line conductor to road
surface of high load routes
6.9
Meter
6.9
Meter
6.9
Meter
7.2
Meter
8.5
Meter
9.2
Meter
Bare live metalwork
( transformer terminals,
jumper connections, etc)
4.6
Meter
4.6
Meter
4.6
Meter
- - -
Clearances of Electrical Line to Other Objects:
Description of Clearance <11
KV33 KV 110KV 220KV 400 KV
Line conductor or bare live
metalwork to any object that is
normally accessible (including
permanently mounted ladders and
access platforms) or to any surface
of a building
3.0
Meter
3.0
Meter
3.4
Meter
4.6
Meter
5.3
Meter
Line conductor or bare live
metalwork to any object to which
access is not required AND on
which a person cannot stand or lean
a ladder
0.8
Meter
0.8
Meter
1.2
Meter
2.4
Meter
3.1
Meter
Line conductors to irrigates, slurry
guns and high-pressure hoses
30
Meter
30
Meter
30
Meter
30
Meter
30
Meter
Line conductors to playing fields8.5
Meter
8.5
Meter
8.5
Meter
8.5
Meter
8.5
Meter
Line conductors to Caravan Sites9.0
Meter
9.0
Meter
9.0
Meter
9.0
Meter
9.0
Meter
Horizontal clearances to wells 15.0
Meter
15.0 15.0 15.0 15.0
Meter Meter Meter Meter
Clearances of Electrical Line to Trees and Hedges:
Description of Clearance <11
KV33 KV 110KV 220KV
400
KV
Line conductor or bare live metalwork
to trees or hedges unable to support a
ladder or being climbed.
0.8
Meter
0.8
Meter
1.2
Meter
2.4
Meter
3.1
Meter
Line conductor or bare live metalwork
to trees or hedges capable of
supporting a ladder or being climbed.
3.0
Meter
3.0
Meter
3.4
Meter
4.6
Meter
5.3
Meter
Line conductor or bare live metalwork
to trees falling towards the overhead
line with the line conductors hanging
vertically.
0.8
Meter
0.8
Meter
1.2
Meter
2.4
Meter
3.1
Meter
Line conductors to trees in Orchards3.0
Meter
3.0
Meter
3.4
Meter
4.6
Meter
5.3
Meter
Clearances of Electrical Line to Street Lighting:
Description of Clearance0.4 KV 11 KV 33KV 110KV
220
KV400KV
Line conductor to Lantern
on same pole
1.0
Meter
- - - - -
Bare line conductor to
lantern or column below.
1.5
Meter
- - - - -
Insulated line conductor to
column
0.3
Meter
- - - - -
Insulated line conductor to
lantern
1.0
Meter
- - - - -
Column to nearest LV pole1.5
Meter
- - - - -
Line conductor to street
lighting column with
(i) Column in normal
upright position.
- 1.7
Meter
1.7
Meter
2.3
Meter
3.3
Meter
4.0
Meter
(ii) Column falling towards - 1.7 1.7 2.3 3.3 4.0
line with line conductor
hanging vertically only
Meter Meter Meter Meter Meter
(iii)Column falling towards
line
- 0.4
Meter
0.4
Meter
0.8
Meter
1.4
Meter
1.9
Meter
Clearances of Electrical Line to Waterways:
Description of
Clearance 0.4 KV 11 KV 33KV 110KV220
KV400KV
Navigable Waters:Lower
bank to conductor or
earth wire
10.5
Meter
10.5
Meter
10.5
Meter
10.5
Meter
10.5
Meter
10.5
Meter
Minor
Watercourses :Lower
bank to conductor or
earth wire
7.6
Meter
7.6
Meter
7.6
Meter
7.6
Meter
7.6
Meter
7.6
Meter
Clearances to Railways:
Description of Clearance0.4 KV 11 KV 33KV 110KV
220
KV400KV
Line conductor to ground
level
6.1
Meter
6.1
Meter
6.1
Meter
6.7
Meter
7.0
Meter
7.6
Meter
Line conductor to ground
level on or across vehicle
parks
7.6
Meter
8.5
Meter
8.5
Meter
9.1
Meter
9.4
Meter
10.1
Meter
Line conductor to ground
level at roads and yards,
where road mobile cranes
are likely to be employed
10.7
Meter
10.7
Meter
10.7
Meter
11.2
Meter
11.5
Meter
12.2
Meter
Line conductor to Rail level7.3
Meter
7.3
Meter
7.3
Meter
8.0
Meter
8.2
Meter
8.8
Meter
Line conductor to the level
of buildings, gantries or
other structures (including
those carrying traction
wires) on which a man
may be
3.0
Meter
3.0
Meter
3.0
Meter
3.7
Meter
4.6
Meter
6.1
Meter
Line conductor to poles
and other projections.
2.4
Meter
2.7
Meter
2.7
Meter
3.0
Meter
3.7
Meter
5.5
Meter
Line conductor to any
other wire other than
traction wires.
1.8
Meter
1.8
Meter
1.8
Meter
2.4
Meter
3.0
Meter
3.7
Meter
Clearances of Electrical Line to Fuel Tanks:
Description of Clearance0.4
KV11 KV 33KV 110KV
220
KV400KV
Horizontal clearance from
line conductors to petrol
tanks and vents
15
Meter
15
Meter
15
Meter
15
Meter
15
Meter
15
Meter
Horizontal clearance from
line conductors to liquid
gas tanks
(1) 459 to 2273 litre
capacity3.0
Meter
3.0
Meter
3.0
Meter
3.4
Meter
4.6
Meter
5.3
Meter
(2) 2274 to 9092 litre
capacity7.6
Meter
7.6
Meter
7.6
Meter
7.6
Meter
7.6
Meter
7.6
Meter
(3) More than 9093 litre. 15
Meter
15
Meter
15
Meter
15
Meter
15
Meter
15
Meter
Vertical clearance from
line conductors to fuel oil
tanksPlease refer Clearances to Objects
Clearances of Electrical Lines to other Electrical Lines:
Description of Clearance0.4
KV11 KV 33KV 110KV
220
KV400KV
Lowest line conductor or
earth wire of upper line to
highest line conductor of
lower line.
1.0
Meter
1.8
Meter
2.0
Meter
2.5
Meter
3.7
Meter
4.4
Meter
Lowest line conductor or
earth wire of upper line to
earth wire of lower line
where erected.
0.7
Meter
1.4
Meter
1.6
Meter
2.5
Meter
3.7
Meter
4.4
Meter
Lowest line conductor or
earth wire of upper line to
any point on a support of
the lower line on which a
person may stand.
2.7
Meter
2.8
Meter
3.0
Meter
3.4
Meter
4.6
Meter
5.3
Meter
Support of upper line and
any conductor of lower
line.
7.5
Meter
7.5
Meter
7.5
Meter
15
Meter
15
Meter
15
Meter
Vertical Passing Clearance (sites where vehicles will pass below the lines):
Description of Clearance<33 KV 110KV 220KV 400 KV
Passing clearance: fixed height loads0.8 Meter 1.4
Meter
2.4
Meter
3.1
Meter
Passing Clearance: variable height loads.2.3 Meter 3.2
Meter
4.1
Meter
5.0
Meter
Horizontal Clearance (sites where there will be no work or passage of plant under lines):
Description of Clearance <33
KV110KV 220KV 400 KV
Minimum horizontal distances to safety barriers6.0
Meter
9.0
Meter
12.0
Meter
14.0
Meter
Distance between Conductors of Same/Different Circuit (On Same Support):
Higher Voltage of either Circuit Lower Voltage of either
CircuitDistance between Circuits
< 33 KV < 1 KV 1.0 Meter
< 33 KV > 1 KV 1.2 Meter
33 KV to 110 KV < 1 KV 1.5Meter
33 KV to 110 KV > 1 KV 2.0 Meter
Above 110 KV All 2.5 Meter
Vertical Distance between Conductors of different Circuit (On Different Support):
Higher Voltage of either CircuitDistance between Circuits
< 1 KV 0.6 Meter
1 KV to 33 KV 1.2 Meter
33 KV to 66 KV 1.8 Meter
110 KV 2.4 Meter
220 KV 2.8 Meter
Distance between Conductors (Taken down from Pole to other Support, on Transformer):
Voltage Distance between Circuits
11 KV & LV Line 0.60 Meter
22 KV & LV Line 0.75 Meter
33 KV & LV Line 0.90 Meter
Horizontal Distance of Telecommunication Line & Overhead Line:
Description of ClearanceDistance
Telecommunication Line(Not insulated) to HV Line Min 1.6 Meter
Telecommunication Line (Bare) to LV (Bare) Line Min 1.2 Meter
Telecommunication Line (Covered) to LV (Bare) Line Min 0.6 Meter
Telecommunication Line (Bare) to Stay (Bare) Wire Min 0.3 Meter
Passage Way for Metal clad Switchgear:
Description of ClearanceDistance
Clean &unobstructed Passages at the front of any Low/High Voltage
Switchgear.
1.0 Meter wide & 2.5
Meter high
Clean &unobstructed Passages at side or under any earthed enclosure
containing Bare Conductor
0.8 Meter wide & 2.2
Meter high
Safe approach distance for Person from Exposed Live Parts:
Circuit VoltageDistance
< 1 KV 0.5 Meter
11 KV 1.5 Meter
22 KV 2.0 Meter
33 KV 2.5 Meter
66 KV 3.0 Meter
110 KV 4.0 Meter
>220 KV 6.0 Meter
Electrical Safety Clearance (Part-4)
Standard: ETSA Utilities
Vertical Clearances between Services:
Service LV Cable HV Cable
Common Pipe 0.100 Meter 0.100 Meter
Gas Pipe 0.200 Meter 0.200 Meter
Sewer Pipe 0.300 Meter 0.300 Meter
Water Pipe 0.600 Meter 0.600 Meter
Horizontal Clearances between Services:
Service LV Cable HV Cable
Common Pipe 0.100 Meter 0.100 Meter
Gas Pipe 0.200 Meter 0.200 Meter
Sewer Pipe 1.0 Meter 1.0 Meter
Water Pipe 0.600 Meter 0.600 Meter
Standard: UK Power Networks – EI 02-0019
Cable Installation Depths:
Voltage Area Depth (min)
Low
Voltage
Footways, grass verges or private property0.450 Meter
Carriageways (including road crossings)0.600 Meter
Normal agricultural land (not deep ploughing)1.0 Meter
Agricultural land subject to deep ploughing1.2 Meter
11 KV to 20
KV
Footways, grass verges or private property0.600 Meter
Carriageways (including road crossings)0.750 Meter
Normal agricultural land (not deep ploughing)1.0 Meter
Agricultural land subject to deep ploughing1.2 Meter
33 KV to
132 KV
Footways, grass verges or private property0.900 Meter
Carriageways (including road crossings)0.900 Meter
Normal agricultural land (not deep ploughing)1.0 Meter
Agricultural land subject to deep ploughing1.2 Meter
Auxiliary
Multi-core
& Multi-pair
Cables
Footways, grass verges or private property0.450 Meter
Carriageways (including road crossings)0.600 Meter
Normal agricultural land (not deep ploughing)1.0 Meter
Agricultural land subject to deep ploughing1.2 Meter
On Cable
Ladder for
LV to HV
The Horizontal clearance between cables on cable ladders2X Dia of Cable
of Largest Cable
or min 150 mm
The clearance from a supporting wall20 mm
The vertical clearance between cables is greater150 mm
If the number of cables > 4, they are to be installed in a
horizontal
Minimum Approach Distance of Crane or Moving Part from Live Conductor:
VoltageWithout Safety Observation
For ordinary PersonUn insulated portions Insulated portions
Upto1KV 2 Meter 1.0 Meter 3.0 Meter
11 KV 2 Meter 1.4 Meter 3.0 Meter
22 KV 2.4 Meter 2 Meter 3.0 Meter
33 KV 2.4 Meter 2 Meter 3.0 Meter
66 KV 2.8 Meter 2 Meter 3.0 Meter
132 KV 3.0 Meter 3.0 Meter 3.0 Meter
220 KV 4.8 Meter 4.8 Meter 6.0 Meter
330 KV 6.0 Meter 6.0 Meter 6.0 Meter
500 KV 8.0 Meter 8.0 Meter 8.0 Meter
Minimum Fixed Clearances for Electrical Apparatus (Isolation Points):
Voltage Fixed Clearance
Up to 11Kv 0.320 Meter
11KV to 33KV 0.320 Meter
33KV to 66KV 0.630 Meter
66KV to 132KV 1.1 Meter
Electrical Safety Clearance (Part-5)
Standard: New Zealand Electrical Code:
Min Safe Distance between Buildings and Overhead Line:
Voltage Pole Tower
11 kV to 33 kV 2 Meter 2 Meter
33 kV to 66 kV 6 Meter 6 Meter
66 kV and Above 8 Meter 8 Meter
Min Safe Distance for excavation near Overhead Line:
Description of Clearance From Pole (Min)From Tower
(min)
Excavation in land more than 750mm depth8 Meter 12 Meter
Excavation in land up to750mm depth2.2 to 5 Meter 6 to12 Meter
Excavation in land up to300mm depth2.2 Meter 6 Meter
Construction near 11KV to 33KV Line2.2 Meter 6 Meter
Construction near 33KV to 66KV Line6 Meter 9 Meter
Construction near 66KV and more8 Meter 12 Meter
Wire Fence near 1KV to 66KV Line2.2 Meter 2.2 Meter
Wire Fence near 66KV and more5 Meter 5 Meter
Min Safe Distance for Tower Carin near Electrical Tower:
Description of Clearance Distance (Min)
Mobile Carin movement4.0 Meter
Tower Carin movement4.0 Meter
Carin movement4.0 Meter
Moving Activity above height of Tower4.0 Meter
Hedge Cutter movement4.0 Meter
Min Safe Vertical Distance above Railway Track:
Description of Clearance Distance (Min)
Earthed conductors5.5 Meter
Stay wires5.5 Meter
Conductors up to 33 kV6.5 Meter
Conductors above 33 kV to 220 kV7.5 Meter
Conductors above 220 kV.8 Meter
Min Distance between two Conductors on Same Supports:
High Voltage Circuit High Voltage CircuitDistance between
circuits(min)
Up to 33 KV Up to 1KV 1.0 Meter
Up to 33 KV More than 1KV 1.2 Meter
33 KV to 110 KV Up to 1KV 1.5 Meter
33 KV to 110 KV More than 1KV 2.0 Meter
More than 110 KV All 2.5 Meter
Min Distance between two Conductors on Different Supports:
High Voltage Circuit Distance (min)
Up to 1 KV 0.6 Meter
1 KV to 33 KV 1.2 Meter
33 KV to 66 KV 1.8 Meter
110 KV 2.4 Meter
More than 220 KV 2.8 Meter
Min Safety Distance from Electrical Apparatuses:
Description of Clearance Distance (min)
Passage In front of Metal Clad Switchgear (UP to HV) 1.0 Meter wide 2.5 Height
Passage In rear or side of Metal Clad Switchgear (UP to HV) 1.0 Meter wide 2.2 Height
Passage at any side of Metal Clad Switch gear containing Bare
conductor (UP to HV)0.8 Meter wide 2.2 Height
Min Approach Distance for Non-Competent Person near exposed Live Parts:
Voltage Distance (min)
Below 110 kV 4.0 Meter
220 kV and above 6.0 Meter
Min Approach Distance for Competent Person near exposed Live Parts:
Voltage Distance (min)
Below 1 kV 0.5 Meter
11 kV 1.5 Meter
22 kV 2.0 Meter
33 kV 2.5 Meter
66 kV 3.0 Meter
110 kV 4.0 Meter
220 kV and above 6.0 Meter
Electrical Safety Clearance (Part-6)
Standard: Western Power Company.
Water Safely Clearance on Electrical Fires:
VoltageMinimum distances between a nozzle producing a fog stream
of fresh water and a live conductor
Up to 750 V 1.5 Meter
750 V to 15 KV 4.0 Meter
15 KV to 230 KV 5.0 Meter
Minimum Approach Distance for Authorized Person:
This is the minimum distance that must be maintained by a person, vehicle or mobile plant.
VoltageDistance (min)
Up to 1 KV 0.7 Meter
1 V to 6.6 KV 0.7 Meter
6.6 KV to 11 KV 0.7 Meter
11 KV to 22 KV 0.7 Meter
22 KV to 33 KV 1.0 Meter
33 KV to 66 KV 1.0 Meter
66 KV to 132 KV 1.2 Meter
132 KV to 220 KV 1.8 Meter
220 KV to 330 KV 3.0 Meter
Minimum Approach Distance for Ordinary Person:
VoltageDistance (min)
Up to 1 KV 3.0 Meter
1 V to 6.6 KV 3.0 Meter
6.6 KV to 11 KV 3.0 Meter
11 KV to 22 KV 3.0 Meter
22 KV to 33 KV 3.0 Meter
33 KV to 66 KV 3.0 Meter
66 KV to 132 KV 3.0 Meter
132 KV to 220 KV 4.5 Meter
220 KV to 330 KV 6.0 Meter
Minimum Approach Distance for Vehicle & Plant for Ordinary Person:
Voltage
Distance (min)
Mobile Plant Vehicle
Up to 1 KV 3.0 Meter 0.6 Meter
1 V to 6.6 KV 3.0 Meter 0.9Meter
6.6 KV to 11 KV 3.0 Meter 0.9Meter
11 KV to 22 KV 3.0 Meter 0.9Meter
22 KV to 33 KV 3.0 Meter 0.9Meter
33 KV to 66 KV 3.0 Meter 2.1 Meter
66 KV to 132 KV 3.0 Meter 2.1 Meter
132 KV to 220 KV 3.0 Meter 2.9 Meter
220 KV to 330 KV 6.0 Meter 3.4 Meter