Why

[Roo]

View media item 35410Overhead supply.
Earth from the bottom of the MET goes to a spike outside.
So why the 16mm from earth to the neutral block?

 

[holmslaw]

..

 

[JohnD]

Whats happened to the cut out fuse?
Why is the cover missing from the meter?

You don't know what Roo does for a living, do you?

 

[Paul_C]

Because its a lash up, neutral should not be connected to earth on a TT installation.

When the installation's earthing is connected to the neutral, it ceases to be TT.

Certainly a horrible lash-up.....

 

[JohnW2]

When the installation's earthing is connected to the neutral, it ceases to be TT. Certainly a horrible lash-up.....

Certainly 'orrible - but, as per previous discussions, if it's not TT, then what is it? Since there's no earth/protective conductor going back to the transformer, I can't see that it can be TN-S. On the other hand, at no point is there a single conductor which combines both N & E functions, so I can't see how it could be described as TN-C-S, either. I'm not at all sure that the terminology is able to cope with this situation we're looking at!

Kind Regards, John.

 

[Roo]

Sorry for the confusion.
As JohnD suggested the fuse and terminal cover missing was my doing.
Earth spike and shed CU looked fairly recent so I was just curious if there was any sane reason any spark would attempt a DIY PME?
The supply isn't PME as I could see it from the pole to the building and there was no where the neutral could have been spiked on the way in.
Like I said I was just curious, but by the sounds of it the installee hadn't a clue on Earthing arrangements?

 

[Paul_C]

On the other hand, at no point is there a single conductor which combines both N & E functions

The incoming neutral is serving both functions, so yes, it's become TN-C-S (even though not PME).

 

[JohnW2]

The incoming neutral is serving both functions, so yes, it's become TN-C-S (even though not PME).

Yes, I suppose that makes sense, functionally.

Kind Regards, John.

 

[ricicle]

by the sounds of it the installee hadn't a clue on Earthing arrangements?

And you haven't got a clue on safety issues by removing the DNO fuse. (Unless you work for the DNO)

 

[JohnD]

(Unless you work for the DNO)

Getting warmer...

 

[Wontdothatagain]

Where is your cutout bung Roo???? Naughty, naughty

 

[Roo]

Where is your cutout bung Roo???? Naughty, naughty

Was just getting it out of my toolbox when I took the picture.
I felt a bung wasn't needed at the time as I hadn't commenced work in the cut out yet, as I was still doing my safety evaluation when i came across the Earth setup.

 

[sparkiemike]

I believe that the ESQCR regulations prohibit a combined neutral & earth conductor within the consumer's installation. I can't find a reference at the moment but will post if I do.

EDIT: Here it is http://www.legislation.gov.uk/uksi/2002/2665/regulation/8/made see 8 (4)

 

[sparkticus]

Where does the T&E on the right side of the picture go? Since it is (was) so well protected by a BS1361 fuse I assume its to the jaccuzi or is it just an electric shower ?