Renovated house low r2 readings !

[Soulsurfer]

Just been sorting out a right mess during a house renovation and tests on newly installed ring final are r1 0.35
rn 0.35 & r2 was expecting around 0.58 but had consistently 0.00 Ohms.
MFT was zeroed again from scratch and was still giving a zero resistance reading
Almost all cable is new and IR tests all perfect. Any ideas ? Thanks

 

[westward10]

Need to test at a socket as it sounds like the cpcs are in contact either within or close to the CU.

 

[Octopus]

Need to test at a socket as it sounds like the cpcs are in contact either within or close to the CU.

Yup, first with the CPC's connected to the CU, then again with them disconnected from the CU

 

[The Ghost]

not connecting tight

That would just give max ohms.

 

[Midwest]

Wot about doing the r1+r2 test on each leg, like when your trying to find a break in a ring? Break the ring at the furthest socket, then test each leg? Just a suggestion, might be a pants idea?

 

[telectrix]

i'd be going round with a wander lead on the cpc with the ends separated in the CU..and maybe also at mid-point.

 

[Soulsurfer]

I must admit I'm a little puzzled by you opening sentence ... "sorting out a right mess" - so are you testing an installation you didn't do?

If this new ring is your work, it should be a formality to resolve the issue.

Existing was a bad spider jointed mess have taken out almost all cables except one old leg which I couldn't get out so re-used & all rest is new cable.

 

[Soulsurfer]

Thanks all must be a silly one as mostly new, have wander lead too so I'll try halving and wander etc.. cheers

 

[Midwest]

Have a wander lead myself, but why bother making things difficult, when you have a perfectly good r1 to test your r2?

 

[Midwest]

Suppose you can null the wander lead, to get just the reading for r2. Depends on how far the lead has 'wander' round the house?

 

[Soulsurfer]

Suppose you can null the wander lead, to get just the reading for r2. Depends on how far the lead has 'wander' round the house?]
Wouldn't be near the length as all ground floor & board in garage, lead us 50m so easy enough

 

[Midwest]

Long as nobody else is in the place, to trip over it or slam the door on it

 

[onions1066]

Have you used the old back boxes?

 

[Soulsurfer]

Have you used the old back boxes?

A few of them bud, but I hate to admit the huge cock up I'd forgotten ! Sorted lunchtime, talk about parallel paths

 

[Soulsurfer]

Stripped a few down, checked at board, all good then got the wander lead out and remembered a big reason that I had forgotten ! Damn I felt like a muppet for it !

 

[Midwest]

Stripped a few down, checked at board, all good then got the wander lead out and remembered a big reason that I had forgotten ! Damn I felt like a muppet for it !

What was it?