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Electrical Safety Clearance (Part-1)AUGUST 8, 2012 9 COMMENTS
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
25 Meter 35 Meter,50 Meter
(ROW) respectively away from the nearest base of tower leg.
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 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.
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 possible
Min 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)AUGUST 9, 2012 16 COMMENTS
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
2.5 Meter
highest point
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 street
5.2 Meter
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 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 1.3 2.0 3.0 4.0 5.0 6.0
using manually operated tool
Meter
Meter
Meter
Meter
Meter 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)AUGUST 10, 2012 8 COMMENTS
Standard: Northern Ireland Electricity (NIE), 6/025 ENA
Clearances of Electrical Line to Ground and Roads:
Description of Clearance
0.4 KV
11 KV
33KV
110KV
220 KV
400KV
Line conductor to any point not over road
5.2 Meter
6.1 Meter
6.4 Meter
6.4 Mete
r
7.0 Meter
7.0 Mete
r
Line conductor to road surface
5.8 Meter
6.1 Meter
6.4 Meter
6.4 Mete
r
7.4 Meter
8.1 Mete
r
Line conductor to road surface of high load routes
6.9 Meter
6.9 Meter
6.9 Meter
7.2 Mete
r
8.5 Meter
9.2 Mete
r
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 KV
33 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 Mete
r
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 Mete
r
0.8 Meter
1.2 Meter
2.4 Meter
3.1 Meter
Line conductors to irrigates, slurry guns and high-pressure hoses
30 Mete
r
30 Meter
30 Meter
30 Meter
30 Meter
Line conductors to playing fields
8.5 Mete
r
8.5 Meter
8.5 Meter
8.5 Meter
8.5 Meter
Line conductors to Caravan Sites
9.0 Mete
r
9.0 Meter
9.0 Meter
9.0 Meter
9.0 Meter
Horizontal clearances to wells
15.0 Mete
r
15.0 Meter
15.0 Meter
15.0 Meter
15.0 Meter
Clearances of Electrical Line to Trees and Hedges:
Description of Clearance
<11 KV
33 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 Mete
r
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 Mete
r
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 Mete
r
0.8 Meter
1.2 Meter
2.4 Meter
3.1 Meter
Line conductors to trees in Orchards
3.0 Mete
r
3.0 Meter
3.4 Meter
4.6 Meter
5.3 Meter
Clearances of Electrical Line to Street Lighting:
Description of Clearanc
0.4 KV
11 KV
33KV
110KV
220 KV
400KV
e
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 pole
1.5 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 line with line conductor hanging vertically only
- 1.7 Meter
1.7 Meter
2.3 Meter
3.3 Meter
4.0 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
110KV
220
KV
400KV
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 Clearance
0.4 KV
11 KV
33KV
110KV
220 KV
400KV
Line conductor to ground level
6.1 Meter
6.1 Meter
6.1 Meter
6.7 Mete
r
7.0 Meter
7.6 Mete
r
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 Mete
r
11.5
Meter
12.2 Mete
r
Line conductor to Rail
7.3 Meter
7.3 Meter
7.3 Meter
8.0 Meter
8.2 Meter
8.8 Meter
level
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
Clearance
0.4 KV
11 KV
33KV
110KV
220
KV
400KV
Horizontal clearance from line conductors to petrol tanks and vents
15 Meter
15 Meter
15 Meter
15 Mete
r
15 Meter
15 Mete
r
Horizontal clearance from line conductors to liquid
gas tanks
(1) 459 to 2273 litre capacity
3.0 Meter
3.0 Meter
3.0 Meter
3.4 Mete
r
4.6 Meter
5.3 Mete
r
(2) 2274 to 9092 litre capacity
7.6 Meter
7.6 Meter
7.6 Meter
7.6 Mete
r
7.6 Meter
7.6 Mete
r
(3) More than 9093 litre.
15 Meter
15 Meter
15 Meter
15 Mete
r
15 Meter
15 Mete
r
Vertical clearance from line conductors to fuel oil tanks
Please refer Clearances to Objects
Clearances of Electrical Lines to other Electrical Lines:
Description of
Clearance
0.4 KV
11 KV
33KV
110KV
220 KV
400KV
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 Mete
r
3.7 Meter
4.4 Mete
r
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 Mete
r
3.7 Meter
4.4 Mete
r
Lowest line conductor or earth wire of
2.7 Meter
2.8 Meter
3.0 Meter
3.4 Mete
r
4.6 Meter
5.3 Mete
r
upper line to any point on a support of the lower line on which a person may stand.
Support of upper line and any conductor of lower line.
7.5 Meter
7.5 Meter
7.5 Meter
15 Mete
r
15 Meter
15 Mete
r
Vertical Passing Clearance (sites where vehicles will pass below the lines):
Description of Clearance
<33 KV 110KV 220KV
400 KV
Passing clearance: fixed height loads
0.8 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 KV 110KV 220KV
400 KV
Minimum horizontal distances to safety barriers
6.0 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 Circuit
Distance 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 Circuit Distance 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 Clearance Distance
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 Clearance Distance
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 Voltage Distance
< 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)AUGUST 11, 2012 10 COMMENTS
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 property
0.450 Meter
Carriageways (including road crossings)
0.600 Meter
Normal agricultural land (not deep ploughing)
1.0 Meter
Agricultural land subject to deep ploughing
1.2 Meter
11 KV to 20 KV
Footways, grass verges or private property
0.600 Meter
Carriageways (including road crossings)
0.750 Meter
Normal agricultural land (not deep ploughing)
1.0 Meter
Agricultural land subject to deep ploughing
1.2 Meter
33 KV to 132 KV
Footways, grass verges or private property
0.900 Meter
Carriageways (including road crossings)
0.900 Meter
Normal agricultural land (not deep ploughing)
1.0 Meter
Agricultural land subject to deep ploughing
1.2 Meter
Auxiliary Multi-core & Multi-pair
Cables
Footways, grass verges or private property
0.450 Meter
Carriageways (including road crossings)
0.600 Meter
Normal agricultural land (not deep ploughing)
1.0 Meter
Agricultural land subject to deep ploughing
1.2 Meter
On Cable Ladder for LV to HV
The Horizontal clearance between cables on cable ladders
2X Dia of Cable of Largest Cable or min 150
mm
The clearance from a supporting wall 20 mm
The vertical clearance between cables is greater
150 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:
Voltage
Without Safety ObservationFor
ordinary Person
Un 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)AUGUST 18, 2012 5 COMMENTS
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 ClearanceFrom Pole (Min)
From Tower (min)
Excavation in land more than 750mm depth
8 Meter 12 Meter
Excavation in land up to750mm depth
2.2 to 5 Meter
6 to12 Meter
Excavation in land up to300mm depth
2.2 Meter 6 Meter
Construction near 11KV to 33KV Line 2.2 Meter 6 Meter
Construction near 33KV to 66KV Line 6 Meter 9 Meter
Construction near 66KV and more 8 Meter 12 Meter
Wire Fence near 1KV to 66KV Line 2.2 Meter 2.2 Meter
Wire Fence near 66KV and more 5 Meter 5 Meter
Min Safe Distance for Tower Carin near Electrical Tower:
Description of Clearance Distance (Min)
Mobile Carin movement 4.0 Meter
Tower Carin movement 4.0 Meter
Carin movement 4.0 Meter
Moving Activity above height of Tower 4.0 Meter
Hedge Cutter movement 4.0 Meter
Min Safe Vertical Distance above Railway Track:
Description of Clearance Distance (Min)
Earthed conductors 5.5 Meter
Stay wires 5.5 Meter
Conductors up to 33 kV 6.5 Meter
Conductors above 33 kV to 220 kV 7.5 Meter
Conductors above 220 kV. 8 Meter
Min Distance between two Conductors on Same Supports:
High Voltage Circuit
High Voltage Circuit
Distance 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 1.0 Meter wide 2.2
Switchgear (UP to HV) 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)AUGUST 22, 2012 1 COMMENT
Standard: Western Power Company.
Water Safely Clearance on Electrical Fires:
Voltage Minimum 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.
Voltage Distance (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:
Voltage Distance (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:
VoltageDistance (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