naked ladies!!!!!

[VoltzElectrical]

no, actually, no real naked ladies, but

I done a EICR or PIR actually on an old house with apparent TT set up for earthing. 6mm earth cable coming up from the door step to the 3036 board. I disconnect the earth cable and do a Ze. Reading? - 0.11!!!!!!! Test between Live and neutral, same reading.

Can't see where connection made between neutral and earth. Any suggestions?

 

[Guest55]

is the house a semi or terrace ?
if so check next door.
i'd be reluctant to record the earthing arrangment as TT without locating the rod first.

 

[Guest55]

and stop resorting to cheap tricks to get your thread noticed.
;-)

 

[VoltzElectrical]

Yeah, terrace. Next door got visible earth rod at front door as has this property.

You cruising for naked piccies big boy?

 

[Guest55]

if i was im sorely disappointed.

 

[ferg]

did you disconnect the bonding too?
Would have to be a bit of a coincidence but....

 

[VoltzElectrical]

haha, good one.

on a serious note though, I have advised customer to get DNO to look at the setup, and quote for an isolator at the same time, but I was wondering if any of you seasoned domestic lot have come across this before. 6mm cable from consumer unit disappears through the wall and is evident at doorstep level before going under the cement. That is all the earthing provided. Cable disconnected from CU to do Ze to avoid parallel paths. Reading of 0.11. Fairly new service head with concentric PVC cable.

 

[Guest55]

well its highly unlikely that an earth rod will be providing a resistance reading on par with a tns set-up.
do the Ze test again with the cable disconnected at the rod , if its still low you know the earth path is coming from somewhere else.

 

[GLENNSPARK]

it would seem to be a TN-C-S if the reading Zpe and Zpn is the same...
maybe a DIY TN-C-S hidden.....like under the floor near the intake or summat...

 

[VoltzElectrical]

I appreciate your input Biff, but no way of disconnecting the earth rod without doing damaging investigating activity.
TBH I was only enquiring if any one has encountered this before and if so, what the cause was. I can assume that 0.11 ohm Ze on an apparent TT system is suggesting that something else (that I can't see) is going on.

 

[Guest55]

there is 1 way to be 100% sure of what the dno is bringing into the house but its very very naughty lol.
i'll get detention for saying it in public

 

[VoltzElectrical]

so pm me!

 

[VoltzElectrical]

it would seem to be a TN-C-S if the reading Zpe and Zpn is the same...
maybe a DIY TN-C-S hidden.....like under the floor near the intake or summat...

overhead supply Glenn

 

[GLENNSPARK]

overhead supply Glenn

it wont be TT....
them rods were left connected no doubt.....but it aint TT is that....it all points to tncs....

 

[SYKRAPS]

Perhaps a parallel from gas or water main???

This thread will get Eng54 going as he has said on many occasions he has achieved TN earth values using rods............