Starting point for discontinuous earth fault on final ring.

[CDB]

Hi all,

I have a 32A Final Ring Circuit that I have swapped a single socket to a FSU for an outside light. I'm now testing it and finding it has a discontinuous earth - I'm also kicking myself for not checking from the off but we learn. Anyway from the attached image you should be able to see my results arranged in a rough layout of the property. If you were looking for a DE where would you start?

I didn't do anything on the day I was there because I didn't have a long lead kit. I'm now kicking myself because I feel I should have been able to suss it on the day.

Thanks in anticipation of your help.

 

[telectrix]

You live conductor makes a perfectly good long lead, no need to go trailing a long wander lead all over the house

but then you wouldn't have the fun of tripping up the squeally rug rats.

 

[Octopus]

A wander lead is a must on some occasions..

I've done a Zs at all sockets to try and find the break.... It can work

 

[Dave OCD]

Hi Richard,

That's really helpful. Thank you. They are r1+r2 fig8 results. So, if I understand correctly, the low values I see in the Kitchen are because they only have one short leg from the CU and the 'return' journey via the dining room is open circuit. The LIM at s2 is because its behind a large dresser.

I'd tell her to hurry up getting dressed and shift out the way so you can also check that socket.

 

[tomspark93]

Reminds me of a job a couple of months ago on a house refurb. I narrowed it down to one room and it turned out they had built a stud wall directly in front of an existing wall and boarded straight over the socket where the fault was. Only managed to find it as I started lifting floor boards to trace back the wiring.