Earthing Arrangement- confused

[Andy™]

they should maintain their earth by converting to PME.

 

[Andy™]

adding a rod could lead the DNO to believe that the instalation has been converted to TT and that it is safe for them to remove their supplied Earth.

not it wont. if it was converted, there would be no earth between DNO earth and DB.... if its connected, then its obvious its still in use.

and either way, the DNO may not even notice there is a rod installed

 

[steptoe]

As you've not made any attempt to answer the question and have now resorted to insults in private messages, I'll guess I'll just have to assume that you have no explanation as to why you think the extra earth electrode is dangerous.

I thought the forum was a place for people to discuss things. I read most threads trying to learn. Clearly some people 'know it all' so why do you need to come on here. I would like to see steptoes answers to the questions asked in this thread as he clearly is knowledgable but no need to insult people and starting blocking eachother. Thought id logged onto screwfix for a second then lol. bad day explode

the questions have all been answered in previous threads.

 

[ianmacd]

[quote name='Andy

 

[PBC_1966]

[quote name='Andy

 

[PBC_1966]

the questions have all been answered in previous threads.

Could you please point us toward an example?

 

[a1]

It's a case of "Agree to Disagree".

 

[Nicky Tesla]

Surely the DNO would write to you first before any action was taken.

Suppose a budding electrician had put one in just to see what its like to put one in as an experiment. The DNO comes round and eyeball it, the student electrician then removes it, and next, the DNO whip away the earth. Carn'T see it happening myself.

Where theres blame theres a claim , "there was a rod there before, honest governor"

 

[steptoe]

Could you please point us toward an example?

try using the search facility.

 

[Mr Smith]

mr smith is beginning to get tingles

regarding the way certain parts of this thread have been going

mr smith was happily enjoying some peace and quiet elsewhere in the system

it has been said before

you knock it off

or we will do it for you.......and provide an infraction in the process.

mr smith

 

[SPECIAL LOCATION]

eh up chuck..

this as bin a gewwin on a bit ah it?

I think all I shall contribute is...

1/ reg 312.3.1, The type of earthing system to be used for the installation shall be determined..... etc..

types are:-

TN-C, TN-S, TN-C-S, TT and IT.

2/ reg 542.1.1 The main earthing terminal shall be connected with earth by ONE of the methods described...

etc..

etc.

 

[spinlondon]

Isn't there a section in the Regulations where it says something like:

ON a TN system, where the Zs are not low enough, then suplementary bonding conductors connecting extraneous-conductive-parts should be installed and if still not low enough an earth rod. That part of the installation should then be treated as TT?

 

[PBC_1966]

try using the search facility.

I've located what appears to be known around here as the "great exported earth thread," here:

http://www.talk.electricianforum.co.uk/showthread.php?t=483

At one point you stated:

I dont really care what anyone does with their earthing arrangements but if I was to test a house with PME/TN-C-S and TT/SPIKE mixed in one installation I would have a CODE 1, and possibly even a disconnection of supply noticed served. there is NO way I would/could ever sanction the use of a parallel path to earth for any kind of fault.

I'm not quite sure what you're getting at. Do you mean if the main house is on TN-C-S you consider it dangerous for, say, an outbuilding to be separated as TT? I'm guessing not, since you then talk about parallel paths to earth and the TT outbuilding would not by itself result in such.

So did you just mean it to cover a scenario where the supply to the house is TN-C-S and there's an extra earth rod installed (which does not make it TT, but does result in a parallel path)?

 

[kme]

Gawd luv a duck!

What did I miss? Has everybody been missing their designated "anger management" classes?

We`ve all been hard at work, and come on here to help people (including each other), and have some light-hearted discussions and banter.

I have read the entire thread, and will possibly post my thoughts later, depending on how heated the thread becomes later.

KME

 

[steptoe]

I've located what appears to be known around here as the "great exported earth thread," here:http://www.talk.electricianforum.co.uk/showthread.php?t=483

At one point you stated:

I'm not quite sure what you're getting at. Do you mean if the main house is on TN-C-S you consider it dangerous for, say, an outbuilding to be separated as TT? No, outside the EZ so different installation I'm guessing not, since you then talk about parallel paths to earth and the TT outbuilding would not by itself result in such. correct

So did you just mean it to cover a scenario where the supply to the house is TN-C-S and there's an extra earth rod installed (which does not make it TT,matter of opinion but does result in a parallel path)? but, yes

mine in red

gawd Im starting to get the hang of this quote thingie.

 

[Lurch]

gawd Im starting to get the hang of this quote thingie.

Not sure about that. When you split the quotes into chunks with correct attributions, and also add multiple quotes into a post in chronological order then you've got the hang of. Currently you're sort of sledge hammering your replies in, which isn't quite 'getting the hang of it'

Now, back to this earthing discussion......

 

[steptoe]

Not sure about that. When you split the quotes into chunks with correct attributions, and also add multiple quotes into a post in chronological order then you've got the hang of. Currently you're sort of sledge hammering your replies in, which isn't quite 'getting the hang of it' Now, back to this earthing discussion......

starting to get the hang of it,

not GOT the hang of it,

Ive only been at this internet thingie for a couple of years, give me a chance,

Im doing well to be able to quote or copy, and paste as well,

 

[Lurch]

Ive only been at this internet thingie for a couple of years, give me a chance,Im doing well to be able to quote or copy, and paste as well,

Well yes, it is impressive when the older generations manage to get on the internet successfully.

 

[steptoe]

Well yes, it is impressive when the older generations manage to get on the internet successfully.

thanks, :^O

I think,

 

[PBC_1966]

So did you just mean it to cover a scenario where the supply to the house is TN-C-S and there's an extra earth rod installed (which does not make it TT,matter of opinion but does result in a parallel path)? but, yes

O.K., just wanted to make sure we were talking about the same thing which started this thread.

So you believe that adding an extra earth rod to a TN-S or TN-C-S system is dangerous (to a code 1 extent) because it creates a parallel earth path - Correct?

That's what I'm getting from your comments in that other long thread, but I can't find anywhere in that debate - or on other threads I've found so far - in which you explain why you believe that to be a problem.

You've also stated clearly in the thread about bonding that a metallic water system should be bonded, regardless of what the current diluted edition of BS7671 says. On that issue, I agree with you fully.

If the supply pipe is plastic, then there are likely to be a few stray paths of relatively high-resistance to earth by way of pipework fixed to the building structure etc. Do you consider these parallel earth paths to be a danger?

If the supply pipe is metallic, then despite the long-standing Wiring Regs. prohibition on using such as the earthing means, it's likely to be a much more effective earth electrode than the typical 5/8-inch 4-ft. long earth rods used today.

By bonding such a water system to the TN-S or TN-C-S earth, you have therefore introduced a parallel earth path which is every bit as effective, if not more so, than the parallel path obtained by connecting to an earth rod. Do you consider this parallel path to be a danger?