Exporting the earth?

[antimatter]

God 'elp us.....what it it with outbuildings that promps otherwise competant electricians to spout complete nonsense?

from j.mawers post.....

Where the installation in the garage is supplied by an armoured cable, the armour or any protective conductor in the cable must not be
connected to and must not be simultaneously-accessible with any exposed-conductive-parts in the outbuilding.

 

[j.mawer]

Not quite sure why the last post got a reference to me as the quote is from "Wiring matters" but it is also from the section regarding using TT system if the garage contains extraneous conductive part i.e. if you make the garage TT then don't connect it to the exported earth from the main building.

 

[antimatter]

@ j.mawer it was a ref to post number 4 (your link)

Just to confim the DNO do not allow exporting of PME

You must isolate the pme in an enclosure then TT the buildings instalation .

 

[IQ Electrical]

from j.mawers post.....

Where the installation in the garage is supplied by an armoured cable, the armour or any protective conductor in the cable must not be
connected to and must not be simultaneously-accessible with any exposed-conductive-parts in the outbuilding.

So you didn't read the paragraph below that regarding 'main protective bonding where PME conditions apply'?

The point is you have a CHOICE-often the only reason for selecting a TT system at the destination is economic reasons because of the way main protective bonding is sized for TN-C-S supplies.

You stated that ESQCR specifically forbids the methods that IET Guidance Notes 8 and 1 prescribe regarding using the suppliers earth to outbuildings on a TN-C-S supply.

Where is this in ESQCR because I am very familiar with it's content and the content of BS 7430 earthing & bonding and have no such reference in my copies of these documents!

 

[antimatter]

regulation 543.4.1 states that in Great Britain regulation 4 of the Electricity, Safety, Quality and Continuity Regulations 2002 prohibit the use of PEN conductors in the comsumers installation.

 

[IQ Electrical]

Not quite sure why the last post got a reference to me as the quote is from "Wiring matters" but it is also from the section regarding using TT system if the garage contains extraneous conductive part i.e. if you make the garage TT then don't connect it to the exported earth from the main building.

Exactly!

 

[IQ Electrical]

regulation 543.4.1 states that in great britain regulation 4 of the electricity, safety, quality and continuity regulations 2002 prohibit the use of pen conductors in the comsumers installation.

it's only a pen conductor up to the service head!!!!!!!!!!!!!!!!!!!!!!

Sheesh!!!!!!!

 

[antimatter]

@iq have you ever installed a submain to an outbuilding on a TNC-S earting system?

 

[IQ Electrical]

Of course I have, why are you having so much difficulty with this?

I have posted links to IET guidance, references to Guidance Notes 8 and 1 but you still can't comprehend it!

You don't understand what a PEN conductor is, and the fact that the S in TN-C-S is referring to the separation of the PEN conductor at the service head!

Please invest in the Guidance Notes if you want to understand these systems and the options open to you as an installer.

 

[antimatter]

Did you export the earth on the TNC-S system to the outbuiling?

 

[antimatter]

Of course I have, why are you having so much difficulty with this?

I have posted links to IET guidance, references to Guidance Notes 8 and 1 but you still can't comprehend it!

You don't understand what a PEN conductor is, and the fact that the S in TN-C-S is referring to the separation of the PEN conductor at the service head!


Please invest in the Guidance Notes if you want to understand these systems and the options open to you as an installer.

And I have have quoted ESQCR regs which prohibit exporting earth of TNC-S system, please read the literature available to you, this is electric basics.

 

[IQ Electrical]

And I have have quoted ESQCR regs which prohibit exporting earth of TNC-S system, please read the literature available to you, this is electric basics.

God you're right about the basics, this is killing me!

You quoted a reg regarding PEN conductors in consumers installations-please, before you post anything else, tell me what you understand by the term PEN conductor and how it is relevant to this thread.

Please just do that.

 

[antimatter]

Yes PEN ends at service head, good diversion you have made but the thread is about exporting the earth from a TNC-S system which you believe is plausible but the only proof you have is a publication from 2005 15th edition which uses the terms Direct and Indirect contact, hhhhhmnnnnnnn

 

[IQ Electrical]

Yes PEN ends at service head, good diversion you have made but the thread is about exporting the earth from a TNC-S system which you believe is plausible but the only proof you have is a publication from 2005 15th edition which uses the terms Direct and Indirect contact, hhhhhmnnnnnnn

Diversion? It's the reg that you misinterpret and base this wasted hour on!

I've posted IET meterial that has amended terminology but can you tell me what has changed in the transition to BS 7671:2008 with regard to the topic?

I've also asked you to read Guidance Note 8 and 1 where excellent diagrams are available to help you to understand this subject.

I enjoy a good debate but if you don't understand the topic yet continue to argue, it becomes very one-sided and tedious, please read the Guidance Notes, that is all it will take for you to take a step back and say 'oh, IQ was right all along, he has a grasp of these electrical basics'

Read the Guidance Notes

 

[antimatter]

Diversion? It's the reg that you misinterpret and base this wasted hour on!

I've posted IET meterial that has amended terminology but can you tell me what has changed in the transition to BS 7671:2008 with regard to the topic?

I've also asked you to read Guidance Note 8 and 1 where excellent diagrams are available to help you to understand this subject.

I enjoy a good debate but if you don't understand the topic yet continue to argue, it becomes very one-sided and tedious, please read the Guidance Notes, that is all it will take for you to take a step back and say 'oh, IQ was right all along, he has a grasp of these electrical basics'

Read the Guidance Notes

Why are you being so aggressive?