Strange Earthing Arrangement

[coatesykid]

Had my ELECSA assessment the other day with Gary Stevens top bloke and he brought to my attention the Earthing Arrangement at a job I took him to the arrangement looks like a TN-S but he told me I had to put an earth rod in so it becomes a TT he also told me that this kind of earthing arrangement fools nearly everyone and that its very common where I live which is in Hull has anyone come across this before.

I know a picture wood be useful but my camera is flat and its late sorry

 

[Engineer54]

If it hasn't an earth rod already, how the hell can it be a TT system??

A photo would be a great help on this one!! Any chance of posting one??

 

[coatesykid]

If it hasn't an earth rod already, how the hell can it be a TT system??

A photo would be a great help on this one!! Any chance of posting one??

he wants me to change it to a TT

 

[coatesykid]

Ill go take a photo it wont be that good its of my phone

 

[Silly Sausage]

Being the wastelands of Humberside, are you getting earth through your water/gas pipes? Have you done a Ze?

 

[coatesykid]

best photo i could get

 

[coatesykid]

Being the wastelands of Humberside, are you getting earth through your water/gas pipes? Have you done a Ze?

yea did ze 0.18ohms

 

[Engineer54]

best photo i could get View attachment 11495

Would have liked to see a wider picture of the service cut-out and supply cable!! Can't make out head nor tail of what your showing here in your photo!! lol!!

 

[coatesykid]

Would have liked to see a wider picture of the service cut-out and supply cable!! Can't make out head nor tail of what your showing here in your photo!! lol!!

look at it sideways did that help

 

[coatesykid]

drew a crude picture

 

[Engineer54]

Well from your sketch it looks very much like a TN-S earthing arrangement, but that's not an actual photo of the set-up, so can't really comment further...

 

[coatesykid]

drew a better pic

 

[coatesykid]

Well from your sketch it looks very much like a TN-S earthing arrangement, but that's not an actual photo of the set-up, so can't really comment further...

was told by Gary that the earth inside the head was paper thin and it would not disconnect with in the 0.4 sec

 

[coatesykid]

thanks for all the help will take good photo tomorrow

 

[Silly Sausage]

thanks for all the help will take good photo tomorrow

Take a few, ones of all your bonding connections as well.

 

[DNS1]

was told by Gary that the earth inside the head was paper thin and it would not disconnect with in the 0.4 sec

What does he base this one?

With a Ze of 0.18ohm you're laughing...

Isn't the head DNO property and therefore their problem?

 

[Engineer54]

Personally, unless he ''knows something'' we don't, he's talking out of his arse!! lol!! This DNO installation is one where PlLC has been used as the supply cable, and you couldn't by any stretch of the imagination say thats paper thin!! It's probably sweated onto the cast cut-out too, so unless there is a wooden fillet between the lead cable and cast box it's a sound solid earth!! Only way your going to check that, is by lifting a floorboard!!! lol!!

 

[Knobhead]

was told by Gary that the earth inside the head was paper thin and it would not disconnect with in the 0.4 sec

All I can say is he knows nothing about paper lead cables. The lead will be about 1mm thick.
In the regard of lead thickness the older the better.

 

[cdavies33]

TN-S all day long for me!!! Ze of 0.18.... Time to hit the sack and sleep easy!

 

[SPARTYKUS]

Hardline back to the transformer! I'm with morpheus & neo from the "matrix" , give me the hard line