Now i am pulling my hair out

[buzzlightyear]

Just put a new cu in started testing .so here it goes start doing rfc line 0.33 nn 0.32 cpc 0.55
Ins all good now this a split load
Dis the cpc what i was working on and now showing earths in and are out so theor is no parallall paths has far that i can see the main earth is out but showing earths all water and gas have been disconnected

 

[Taylortwocities]

I'm with Sparkdog here

I wouldn't rely on a plug tester for anything.
Perhaps there is supplementary bonding somewhere, it used to be taken off the nearest cpc.

My guess supp bonding under the bathroom floor between earthed copper pipe and your RFC earth.

 

[buzzlightyear]

My guess supp bonding under the bathroom floor between earthed copper pipe and your RFC earth

no to that .RCD protected bath revamped.

 

[123]

I still don't see what you are hoping to find or achieve here. It could be supplementary bonding, it could be metal dual boxes. It's a parallel path somewhere. If I was the customer I wouldn't like to be paying for all this unneeded work.

 

[static zap]

Any sneaky external installs spurred from RFC ?
(CHARLIE DIMMOCK Water feature)

 

[telectrix]

time to call in the experts.:

 

[buzzlightyear]

I am now checking for any parrell paths so here it goes up stairs ring cpc r1. In board in r2 wander lead mothod testing to boiler 23.6 ohms and all pipe work the same . water service disconnected and gas .any thouhts

 

[sparksfly]

sorry if I repeat anything said/done.....but forget the plug in tester. Use your multimeter on all RFC's dead test end to end & also test for any cross over of RFC's r2 on cct1 to r2 cct2 (neutrals as well)etc and RFC r2 to the met with other ccts attached...anything ?
If you want to work live test at sockets removing neutral from cct ?

 

[The Ghost]

I suppose this is what is meant when @buzzlightyear says "To infinity and beyond" and then flies off.

 

[The Ghost]

Are the sockets surface or sunken? If sunk do they have a fly lead to the box and is the wall damp at all?

 

[buzzlightyear]

Vort all boxes are sunk in the walls the. Fly leads that are in should not show any earths it should be clear .

 

[SJD]

If I understand correctly, you have one specific RFC that has a connection to earth somewhere, despite the installation earth & bonding connections all being disconnected?

As others have mentioned, I'm not totally understanding why this is a problem? I'm assuming nothing is tripping, and you just want to know why, rather than needing to disconnect this other earth? Normally I'd just move on.

Assuming you really do need or want to know, then can you not just split the RFC into two, and find which half is still earthed. Then repeat with the earthed bit, until you narrow it down? Just like looking for any other fault on an RFC?

And when you say earthed, are you measuring a resistance to the suppliers' earth? If so, what value (from each end of the RFC)? Or did I recall seeing you are measuring Zs values on this RFC (with main earth and bonding disconnected)?

 

[telectrix]

come monday, when buzz has recharged his dilithium crystals, he''ll find it in a nanomonth.

 

[Wilko]

Usually it's me trying to find out why something does not compute - go Buzz go !
Perhaps confirm IR on that circuit and then isolate any backbox connections. With 23.6 Ohms it sounds like there's "an earthrod" attached .

 

[Wilko]

I have just given up for the day, sun shot from putting up outside lights last 2 days. Can I come over and lift some floor boards instead?

 

[wildwest]

Buzz, what sort of walls are the metal back boxes fixed in?
what sort of building is it?