TNCS
Earthing a "Portacabin"
- Thread starter Sidewinder
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But the BRB describes TN-CS as "the supply system's PEN conductor is earthed at several points"
In this case it's only earthed at ONE point so is not "protective MULTIPLE earthing"
As such it appears to be an anomaly not actually covered in 7671?
I won't lose sleep over it, I'll put TNCS on the certificate, but I was just curious.
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But the BRB describes TN-CS as "the supply system's PEN conductor is earthed at several points"
In this case it's only earthed at ONE point so is not "protective MULTIPLE earthing"
As such it appears to be an anomaly not actually covered in 7671?
I won't lose sleep over it, I'll put TNCS on the certificate, but I was just curious.
that is exactly one of my main gripes.Kind of.They 'rod' (for want of a better word), the supply neutral, which gives you the PME supply.
The operative word is Protective Multiple Earthing - multiple simply means more than one - so they could 'rod' the supply twice or ten times.....it's still PME (I think this is Steptoes grievance with PME)
Now, if your house had a TNS earthing system before they convert their supply neutral, it will still be a TNS earthing system after they convert their supply - the TNS applies to the earthing system provided to the installation, not what the supply is capable of providing.
Think of it this way - If we took Steptoes advice and converted all TNCS (PME) installs to TT, then the installations would be TT, regardless of the fact that the supply neutral is still a PEN conductor with PME supply.
In the same way your installation is still TNS, until such time as the DNO allow connection of your 'earthing conductor' to the neutral, then it becomes TNCS.
bit like saying I have fitted multiple socket outlets,
yes, all two of them.
that is exactly one of my main gripes.Kind of.They 'rod' (for want of a better word), the supply neutral, which gives you the PME supply.
The operative word is Protective Multiple Earthing - multiple simply means more than one - so they could 'rod' the supply twice or ten times.....it's still PME (I think this is Steptoes grievance with PME
Now, if your house had a TNS earthing system before they convert their supply neutral, it will still be a TNS earthing system after they convert their supply - the TNS applies to the earthing system provided to the installation, not what the supply is capable of providing.
Think of it this way - If we took Steptoes advice and converted all TNCS (PME) installs to TT, then the installations would be TT, regardless of the fact that the supply neutral is still a PEN conductor with PME supply.
In the same way your installation is still TNS, until such time as the DNO allow connection of your 'earthing conductor' to the neutral, then it becomes TNCS.
bit like saying I have fitted multiple socket outlets,
yes, all two of them.
I know I get told off for this all the time and people actually provide black and white written word to back up their side,
but I'll say it yet again (just to be consistent)
TNCS is NOT PME
Wet Fish
I know I get told off for this all the time and people actually provide black and white written word to back up their side,
but I'll say it yet again (just to be consistent)
TNCS is NOT PME
Wet Fish
PME is always TNCS, but TNCS is not always PME.
PME is always TNCS, but TNCS is not always PME.
read one of the many threads
read one of the many threads
Albert no it is not, but ESQCR in the UK makes them one in the same as far as the DNO's are concerned, thus we are then presented with TN-C-S/PME, thus as far as we are then concerned they are one in the same. Sorry bud.
I understand your points but currently in the UK the DNO's MUST work to ESQCR, just as we "must" work to 7671. We both must comply with EAWR.
ADS,
It is ONE of Albert's grievances!
I have to say I understand Albert's points and agree with many of them, just not as vehemently as he does!
I understand your points but currently in the UK the DNO's MUST work to ESQCR, just as we "must" work to 7671. We both must comply with EAWR.
ADS,
It is ONE of Albert's grievances!
I have to say I understand Albert's points and agree with many of them, just not as vehemently as he does!
Albert no it is not, but ESQCR in the UK makes them one in the same as far as the DNO's are concerned, thus we are then presented with TN-C-S/PME, thus as far as we are then concerned they are one in the same. Sorry bud.
I understand your points but currently in the UK the DNO's MUST work to ESQCR, just as we "must" work to 7671. We both must comply with EAWR.
ADS,
It is ONE of Albert's grievances!
I have to say I understand Albert's points and agree with many of them, just not as vehemently as he does!
I understand your points but currently in the UK the DNO's MUST work to ESQCR, just as we "must" work to 7671. We both must comply with EAWR.
ADS,
It is ONE of Albert's grievances!
I have to say I understand Albert's points and agree with many of them, just not as vehemently as he does!
?????
Noooooooooooooooooooooooooooooooooooooooooooooooooooooooooo:Spam2
Not again!!!!!!!!!!
I can`t take another one....................................
:run
?????
Noooooooooooooooooooooooooooooooooooooooooooooooooooooooooo:Spam2
Not again!!!!!!!!!!
I can`t take another one....................................
:run
I do understand that Sidewinder,
but as we all know,
sometimes its not as simple as black & white.
but, as you rightly point out, we must accept that a TNCS system is PME(even if its not)
:slap
:red card
I do understand that Sidewinder,
but as we all know,
sometimes its not as simple as black & white.
but, as you rightly point out, we must accept that a TNCS system is PME(even if its not)
:slap
:red card
You're not allowed to
PME applies to the supply provided by the DNO - you are not allowed a CNE (PEN) conductor on the consumer side of the cutout, so you're not allowed to 'export' it (for want of a better word)
Maybe you're talking about 'exporting' the 'protective conductors' of a TT, TNS or TNC-S earthing system - now that's a different kettle of fish that we really don't want to get in to.
You're not allowed to
PME applies to the supply provided by the DNO - you are not allowed a CNE (PEN) conductor on the consumer side of the cutout, so you're not allowed to 'export' it (for want of a better word)
Maybe you're talking about 'exporting' the 'protective conductors' of a TT, TNS or TNC-S earthing system - now that's a different kettle of fish that we really don't want to get in to.
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There goes Canoeboy..........Embarrassing me yet again
:coat
:coat
