Electrical Safety Standards for LV

8/19/2019 Electrical Safety Standards for LV

1/10

Electrical Safety Standards forLV/MV/HV (Part-1)

Posted NOV 7 2012 by JIGU PARM AR in HIGH VOLTAGE , LOW VOLTAGE , MEIU M VO LTAGE !it" #

$OMMENT%

Electrical Safety Standards for LV/MV/HV (on photo Indonesia's state energy giant - High Voltage

Switchyard)

Content

1. Standard: Western Power Company• Water Safely Clearance on Electrical Fires

• Minimum Approach Distance for Authorized Person

• Minimum Approach Distance for Ordinary Person

• Minimum Approach Distance for Vehicle and Plant for Ordinary Person

.

2.Standard: New Zealand Electrical Code• Min. Safe Distance between Buildings and Overhead Line

http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1http://electrical-engineering-portal.com/2012/11http://electrical-engineering-portal.com/author/jiguparmarhttp://electrical-engineering-portal.com/category/high-voltage-2http://electrical-engineering-portal.com/category/high-voltage-2http://electrical-engineering-portal.com/category/low-voltage-2http://electrical-engineering-portal.com/category/low-voltage-2http://electrical-engineering-portal.com/category/medium-voltagehttp://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#commentshttp://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#commentshttp://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#1http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#2http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#3http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#4http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#5http://electrical-engineering-portal.com/2012/11http://electrical-engineering-portal.com/author/jiguparmarhttp://electrical-engineering-portal.com/category/high-voltage-2http://electrical-engineering-portal.com/category/low-voltage-2http://electrical-engineering-portal.com/category/medium-voltagehttp://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#commentshttp://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#commentshttp://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#1http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#2http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#3http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#4http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#5http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1


2/10

• Min. Safe Distance for excavation near Overhead Line

• Min. Safe Distance for Tower Carin near Electrical Tower

• Min. Safe Vertical Distance above Railway Track

• Min. Distance between two Conductors on Same Supports

• Min. Distance between two Conductors on Different Supports

• Min. Safety Distance from Electrical Apparatuses

• Min. Approach Distance for Non-Competent Person near exposed Live Parts

• Min. Approach Distance for Competent Person near exposed Live Parts

.

2. Standard: ETSA Utilities• Vertical Clearances between Services

• Horizontal Clearances between Services

.

2. Standard: UK Power Networks – EI 02-0019• Cable Installation Depths

• Minimum Approach Distance of Crane or Moving Part from Live Conductor

• Minimum Fixed Clearances for Electrical Apparatus (Isolation Points)

1. 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

Go to Content ↑

Minimum Approach Distance for Authorized Person

This is the minimum distance that must be maintained by a person, vehicle or mobile plant.

Voltage Distance (minimum)

Up to 1 KV 0.7 Meter

http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#6http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#7http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#8http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#9http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#10http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#11http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#12http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#13http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#14http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#15http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#16http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#17http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#18http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#contenthttp://electrical-engineering-portal.com/safety-clearance-recommendations-for-transformerhttp://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#6http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#7http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#8http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#9http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#10http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#11http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#12http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#13http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#14http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#15http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#16http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#17http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#18http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#contenthttp://electrical-engineering-portal.com/safety-clearance-recommendations-for-transformer


3/10

1 V to 6.6 KV 0.7 Meter

6.6 KV to 11 KV 0.7 Meter







Go to Content ↑

Minimum Approach istance for !rdinary Person

Voltage Distance (min)


1 V to 6.6 KV 3.0 Meter

6.6 KV to 11 KV 3.0 Meter







Go to Content ↑

Minimum Approach istance for "ehicle and Plant for !rdinaryPerson

http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#contenthttp://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#contenthttp://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#contenthttp://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#content


4/10


Mobile Plant Vehicle

Up to 1 KV 3.0 Meter 0.6 Meter

1 V to 6.6 KV 3.0 Meter 0.9 Meter

6.6 KV to 11 KV 3.0 Meter 0.9 Meter

11 KV to 22 KV 3.0 Meter 0.9 Meter






Go to Content ↑

#. Standard: $ew %ealand Electrical Code

Min. Safe istance &etween 'uildin(s and Oerhead 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

Go to Content ↑

Min. Safe istance for e)ca*ation near !*erhead +ine

Description of Clearance From Pole (Min) From Tower

(min)

Excavation in land more than 750mm depth 8 Meter 12 Meter

http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#contenthttp://electrical-engineering-portal.com/design-of-overhead-transmission-line-foundationhttp://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#contenthttp://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#contenthttp://electrical-engineering-portal.com/design-of-overhead-transmission-line-foundationhttp://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#content


5/10

Excavation in land up to750mm depth 2.2 to 5 Meter 6 to12 Meter

Excavation in land up to 300mm 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

Go to Content ↑

Min. Safe istance for ,ower Carin near Electrical ,ower

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

Go to Content ↑

Min. Safe "ertical istance a&o*e -ailway ,rac

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



6/10

Conductors above 220 kV. 8 Meter

Go to Content ↑

Min. istance &etween two !ond"ctors 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

Go to Content ↑

Min. istance &etween two Conductors on ifferent Supports

High Voltage Circuit Distance (min)




110 KV 2.4 Meter

More than 220 KV 2.8 Meter

Go to Content ↑

Min. Safety istance from Electrical Apparatuses

Description of Clearance Distance (min)

http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#contenthttp://electrical-engineering-portal.com/inspection-of-voltage-drop-in-conductorshttp://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#contenthttp://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#contenthttp://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#contenthttp://electrical-engineering-portal.com/inspection-of-voltage-drop-in-conductorshttp://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#contenthttp://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#content


7/10

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 containingBare conductor (UP to HV)

0.8 Meter wide 2.2 Height

Go to Content ↑

Min. Approach istance for $on/Competent Person neare)posed +i*e Parts


Below 110 kV 4.0 Meter

220 kV and above 6.0 Meter

Go to Content ↑

Min. Approach istance for Competent Person near e)posed

+i*e Parts


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

Go to Content ↑

http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#contenthttp://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#contenthttp://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#contenthttp://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#contenthttp://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#contenthttp://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#content


8/10

0. Standard: E,SA tilities

"ertical Clearances &etween Ser*ices

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

Go to Content ↑

2orizontal Clearances &etween Ser*ices

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

Go to Content ↑

3. Standard: 4 Power $etwors 5 E6 7#/7718

Ca&le 6nstallation epths

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



9/10

11 KV to 20

KV

Footways, grass verges or private property 0.600 Meter




33 KV to

132 KV





Auxiliary

Multi-core &

Multi-pair

Cables





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

Go to Content ↑

Minimum Approach istance of Crane or Mo*in( Part from +i*e

Conductor

Voltage Without Safety Observation For ordinary

PersonUn insulated

portions

Insulated portions

Up to 1KV 2 Meter 1.0 Meter 3.0 Meter

http://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#contenthttp://electrical-engineering-portal.com/electrical-safety-standards-for-lvmvhv-part-1#content


10/10

11 KV 2 Meter 1.4 Meter 3.0 Meter

22 KV 2.4 Meter 2 Meter 3.0 Meter



132 KV 3.0 Meter 3.0 Meter 3.0 Meter




Electrical Safety Standards for LV

Documents