Earthing Arrangement- confused

[Apache]

Girlies please!

Admin 2 is coming around to all your houses to ***** slap you right now.

You have been warned!

No need to get personal!

 

[spinlondon]

Well maybe if you understood the difference ALL the people who have said your understanding is wrong may not have resourted so short replys as there are no other ways to say what we have been saying for a number of posts now.I now understand why steps gets stressed with people on here when he is trying to make a point.

TN-C-S you are describing in BS7671 is NOT a distribution system but an earthing system. The distribution system or network are PME or (as Lurchie pointed out above) CNE.

I'm sorry, but my understanding of something does not affect your abillity to make coherent posts. You seem to make non-sensical posts as a norm.

The different descriptions TN-S, TN-C-S etc. describe how the earth is distributed. As such they are distribution systems.

In the case of TN-C-S, the earth is combined with the neutral and then separated. T refers to Earth (Terra), N refers to Neutral, C refers to Combined and S refers to Separated.

You may be of the opinion that they don't refer to distribution systems, that is your opinion, I disagree.

 

[ianmacd]

Wrong. In the context of BS7671 (which is not used for distribustion) they are describing how earth is presented not distributed as that has no bearing on how we deal with the installation.

Its not just my opinion, it seems like most peoples options with respect to BS7671.

 

[spinlondon]

Wrong. In the context of BS7671 (which is not used for distribustion) they are describing how earth is presented not distributed as that has no bearing on how we deal with the installation.Its not just my opinion, it seems like most peoples options with respect to BS7671.

I was hoping that you would not continue to make these non-sensical posts.

If you really think that using the word presented instead of distributed makes a difference, then good luck to you.

 

[ianmacd]

I was hoping that you would not continue to make these non-sensical posts.If you really think that using the word presented instead of distributed makes a difference, then good luck to you.

Are you on the same planet as the rest of us? Of course it makes a difference. PME is effectivly TN-C. Have you ever seen a TN-C installation?

I can not be bothered to try and correct your broken view on this so good luck to you and hope you don;t make an pr**t of yourself to a DNO by claiming you have a "PME installation".

 

[spinlondon]

Are you on the same planet as the rest of us? Of course it makes a difference. PME is effectivly TN-C. Have you ever seen a TN-C installation?I can not be bothered to try and correct your broken view on this so good luck to you and hope you don;t make an pr**t of yourself to a DNO by claiming you have a "PME installation".

Unfortunately, I do not know which planet you are on, so am unable to answer your question

Using the word presented instead of distributed makes a difference? Please explain.

I agree to an extent, PME is effectivly TN-C, however I would point out that TN-C-S is also TN-C. Therefore if TN-C is effectivly PME, then TN-C-S must also effectivly be PME.

Which I believe is what I stated in post 99, which you found so disagreeable.

Yes I have seen a TN-C installation. They are not widely used in the UK, as there is a prohibition on their use.

However they are used in such places as France and Poland.

Thank you for wishing me good luck.

It is unlikely that I will make a p***t of myself, considering that EDF and Eon both refer to PME installations, and they are the Distributors that I have most contact with.

Perhaps we have all got it wrong. I may mention it the next time I have occasion to speak to someone from either company.

 

[Lurch]

I agree to an extent, PME is effectivly TN-C, however I would point out that TN-C-S is also TN-C. Therefore if TN-C is effectivly PME, then TN-C-S must also effectivly be PME.

No, PME and TN-C-S are not the same. TN-C-s is not always PME, but PME is generally provided with TN-C-S. Like I said, look at what PME and TN-C-S are, they are not the same.

 

[Andy™]

 

[Zeespark]

You aint bloody wrong there Andy

AndyGuinness

 

[spinlondon]

No, PME and TN-C-S are not the same. TN-C-s is not always PME, but PME is generally provided with TN-C-S. Like I said, look at what PME and TN-C-S are, they are not the same.

Ian has stated that PME is effectivly TN-C. Do you or do you not agree with Ian?

I believe that TN-C-S is also TN-C, just that it is separated at the installation. Do you or do you not agree with me?

I understand what PME and TN-C-S are.

I agree, that TN-C-S does not necessarily have to have PME, as far as I'm aware in this country, it always does.

The term PME is not as far as I'm aware usually used in relation to anything other than TN-C-S.

Now if you want to join Ian's band wagon and start stating that TN-C-S and PME are separate and distinct animals and never the twain shall meet, feel free.

I will continue to recognise that in this country when people use the term PME, they are also refering to TN-C-S, and vice versa.

 

[Mr Smith]

messrs

if this topic becomes personal again we may have to close it

it began as an interesting discussion

now it appears to be a semantics issue

get the thread back on topic

or leave it alone

thankyou

mr smith

 

[Andy™]

or leave it alone

ive already gave up with this thread. certain members who say one thing have not shown anything to back it up but still keep going on that they are right

 

[jdmjrmdam]

This is an interesting thread. Can I ask slighly different but hopefully related question? Where the distribution network is PME how do the DNO physically achieve the additional connections to earth along the length of the supply cable?

 

[PBC_1966]

Where the distribution network is PME how do the DNO physically achieve the additional connections to earth along the length of the supply cable?

Earth electrode at the base of the pole, bonded to the distribution neutral.

 

[jdmjrmdam]

So if the distribution is underground. How do they decide how many aditional earth electrodes to install between the transformer and the consumers installation?

 

[Andy™]

This is an interesting thread. Can I ask slighly different but hopefully related question? Where the distribution network is PME how do the DNO physically achieve the additional connections to earth along the length of the supply cable?

if its overhead, then eah pole will often have its own rod

if its underground, there will be rods at various points. they may also install additional rods if they do some work and have access to the neutral

 

[ianmacd]

[quote name='Andy

 

[PBC_1966]

[quote name='Andy

 

[steptoe]

This is an interesting thread. Can I ask slighly different but hopefully related question? Where the distribution network is PME how do the DNO physically achieve the additional connections to earth along the length of the supply cable?

they drive Multiple rods in along the entire length of the supply cable back to star point, all connected to neutral.

Earth electrode at the base of the pole, bonded to the distribution neutral.

as above, Multiple rods.

[quote name='Andy

 

[spinlondon]

as for the difference in distributed and presented,distributed is how the cable/earth gets to you, ie, TN-C

presented is how they make it available to you(at the cut out), ie, TN-C-S

the earth is combined with the neutral along the supply cable, but when they present the earth to you they have separated it.

Not quite heard it described that way before.

I have heard distributed as TN-C, and made available as TN-S before now.

As you say combined and then separated.