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markadams

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One of the questions on a recent Part P assessment was how would I wire an external outbuilding if the earthing arrangement to the property was PME.

I said I would run a three core SWA from the property to the outbuilding and use the cable armour and the third core as the exported CPC.

I was highly criticised and was told that I should install a rod at the property and at the outbuilding.

I can find no mention of this in 17th ed AMD3 book, can anyone tell me where i would find this if it is the case.

I have had a couple of other Assessments previously where they have checked out building installs and never mentioned this so I am not happy.
 
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Giving a non conformance without a regulation boils my whatsits :mad:
From a certain well respected instructional doc :

View attachment 42778

[ElectriciansForums.net] Part P assessment question
 
Last edited:
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No matter who the bloke is, it seems he doesn't have the experience, or knowledge, to carry out an annual assessment.
BUT...….What exactly is a 'Part P assessment'?

Maybe get a plumber doing one of those.o_O
 
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Worst assessment I ever had was with a stromer assessor, he couldn't stop telling me how good he was and then giving me incorrect information including that if an outbuilding in a garden was more than 10 metres from the house it had to have TT.

I got fed up with constantly having to chase stroma for every certificate I applied for (I complained to the stroma manager over the phone and in emails and nothing changed). The £4 extra a week I pay to the NICEIC is worth it to me.
 
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markadams said:
One of the questions on a recent Part P assessment was how would I wire an external outbuilding if the earthing arrangement to the property was PME.

I said I would run a three core SWA from the property to the outbuilding and use the cable armour and the third core as the exported CPC.

I was highly criticised and was told that I should install a rod at the property and at the outbuilding.

I can find no mention of this in 17th ed AMD3 book, can anyone tell me where i would find this if it is the case.

I have had a couple of other Assessments previously where they have checked out building installs and never mentioned this so I am not happy.
Click to expand...
 
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Les Dove said:
That sounds like the Stroma assessor I had last year. He insisted that any outbuilding FURTHER than twenty metres from the main building needed to be TT.
Click to expand...
is this the assessor?

[ElectriciansForums.net] Part P assessment question
 
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To my mind it seems everybody is wrong
Firstly the assessor for calling it a non compliance of the wiring regs

Its wrong by the op (and everybody else here) for assuming this is a issue about those wiring reg being contravened or not

As far as I understand,there can be dangerous situations created by incorrect use of the supply earthing arrangement

Its a "suppliers" stipulation that Pme not be used outside of the equipotential zone without their permission

That permission should be sought from the supplier in order to do so,otherwise its get yourself a rod and provide your own

The wiring regs will tell you how to cater with whatever earthing is used,it does not give choices of what to do with the earthing provided by others and whether it should or should not be utilised
 
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Des 56 said:
To my mind it seems everybody is wrong
Firstly the assessor for calling it a non compliance of the wiring regs

Its wrong by the op (and everybody else here) for assuming this is a issue about those wiring reg being contravened or not

As far as I understand,there can be dangerous situations created by incorrect use of the supply earthing arrangement

Its a "suppliers" stipulation that Pme not be used outside of the equipotential zone without their permission

That permission should be sought from the supplier in order to do so,otherwise its get yourself a rod and provide your own

The wiring regs will tell you how to cater with whatever earthing is used,it does not give choices of what to do with the earthing provided by others and whether it should or should not be utilised
Click to expand...
If thats the case then the DNO should be providing that info when they install the supply or a upto date map online so the information can be cross referenced.
 
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I've seen that line posted a few times 'Distribution Network Operators may forbid their PME earth being exported from the supplied building' (or similar), but I've never seen it actually written in any DNO document?
 
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Midwest said:
I've seen that line posted a few times 'Distribution Network Operators may forbid their PME earth being exported from the supplied building' (or similar), but I've never seen it actually written in any DNO document?
Click to expand...
….never seen anything done about it, either.

Anyone had any resultant problems?
 
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