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 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 Observation

For 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

Advertisements

About Jignesh.Parmar
Jignesh Parmar has completed M.Tech (Power System Control), B.E(Electrical) from Gujarat University. He has more than 14 years experience in Power Transmission-Power Distribution-Electrical energy theft detection-Electrical Maintenance-Electrical Projects(Planning-Designing-coordination-Execution). He is Presently associate with one of the leading business group as a Deputy Manager at Ahmedabad,India. He is Freelancer Programmer of Advance Excel and design useful Excel Sheets of Electrical Engineering as per IS,NEC,IEC,IEEE codes. He is technical Author for "Electrical Mirror" and "Electrical India" Magazines. He is Technical Blogger and Familiar with English, Hindi, Gujarati, French languages. He wants to Share his experience & knowledge and help technical enthusiasts to find suitable solutions and updating themselves on various Engineering Topics.

12 Responses to Electrical Safety Clearance (Part-4)

  1. manan says:

    it is really very useful things you are providing sir…thanks a lot…

  2. Thank you so much, Mr.Jignesh.

  3. ravi V says:

    excellent

  4. santosh says:

    May I connect transformer neutral pits with grid earthing system?
    please reply ……

  5. i want 220 kv double circut in parlley laying , how much the clear distance need minimum vertical horizontal,
    in my site oil line parllely is going in my cable route , how much req vertical and horizontal clearance

  6. Inverters in chennai says:

    Very nice article, thanks..

  7. Nikos says:

    Hello Mr. Parmar. Have you any information about safety rules concerning of vertical clearances of wires, coductors and cables from chimneys, radio and television antennas and tanks?

    • Nikos says:

      What is the vertical clearance betwen live conductors LV, MV and chimneys, radio & television antennas and tanks?

  8. samer says:

    dear sir ..

    thank you so much …. but if u can provide us the number of iec standard about clearance between M.V (11 KV) LINE and oil pipe ……..plz

  9. chris says:

    do you have the IEC reference for clearances between services?

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: