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Learner42
Commentator

Join Date: Jun 2011
Posts: 67
Good Answers: 2

Bonding Different Earthing Systems

04/02/2012 8:34 AM

Generally we have the following earthing systems in an industrial installation each having its own earth electrode/s:

1. Sytem neutral earth

2. Equipotential bonding earth

3. Lightening protection earth

4. Static grounding sytem

5. Maintenance grounding system

6. Electronic grounding systems.

My question is should all the earth rods of these systems must be bonded together. If so as per which code. Kindly provide the reference of the code.
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Pathfinder Tags: Earthing rod bonding
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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
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Good Answers: 839
#1

Re: Bonding different earthing systems

04/02/2012 8:35 AM

→British Standard 7671.

→Indian Standard 3043.

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electricalexpert65
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Join Date: Oct 2009
Posts: 2061
Good Answers: 169
#2

Re: Bonding Different Earthing Systems

04/02/2012 10:09 AM

IS 3043

IEC 60364

IEEE 142

IEEE 1100

NEC (USA)

NEC (BIS)

IS 2309

IS 7689

IE Rules, 1956

etc......
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Learner42
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Join Date: Jun 2011
Posts: 67
Good Answers: 2
#5
In reply to #2

Re: Bonding Different Earthing Systems

04/04/2012 1:27 AM

Thanks for your response. I lookedup NEC and could not find the required information. Could you give specific clause of any of these standards which provides the required info.
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nobodysomebody47
Power-User

Join Date: Nov 2011
Posts: 171
Good Answers: 1
#3

Re: Bonding Different Earthing Systems

04/02/2012 1:04 PM

Excellent references by electrical expert, here are some others

http://en.wikipedia.org/wiki/Multipoint_ground

http://en.wikipedia.org/wiki/Ground_%28electricity%29

Bonding and Grounding Illustrations

Distribution System Earthing Guidelines
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pnaban
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Join Date: Jun 2010
Location: srilanka
Posts: 2725
Good Answers: 5
#4

Re: Bonding Different Earthing Systems

04/03/2012 11:31 AM

In a recent thread an item called TEC(transient earth coupling)was mentioned to couple lightning earth other earths when a lightning occurs.

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electricalexpert65 (1); Learner42 (1); nobodysomebody47 (1); pnaban (1); PWSlack (1)

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