8.9M ohms between neutral and Earth

[Hawk81]

Thanks, Hawk. I didn`t think you`d intended offence - Unless there`s a wiring fault, it won`t show up N-E - though a load connected somewhere can give odd results....

KME

although after thinking a bit there i want to know are we not supposed to point out peoples mistakes when answering questions. If we dont then how will anyone learn. I want my mistakes pointed out so i can learn. Plus we cant all get cross if we find we have made a mistake.

 

[kme]

Yes, as do I. I simply think that there was a slight misunderstanding of meanings there - you were querying, and Rugger thought you were correcting him.

One of the difficulties with written word over spoken -I think that`s why many of use smilies a lot - you can help to convey the intention behind the post

HTH

KME

 

[rugbymacc]

hawk

Sorry for jumping up and down .... been a hard day. :coffee :Blushing:coat

Just thought i'd ask the poster, As the readings seemed to point to a neon/florscent @ L/N

And just wanted to clear that option/test from the possibles.

 

[Hawk81]

thats dead on mate. We all have bad days. I know all too well what they are like.

 

[Nicky Tesla]

stop patting each other on the back and get on with answering the questions:z

 

[pan]

Hello, Thanks for looking. I'm sorry for the confusion. My readings were taken with a Fluke multimeter set a continuity (ohms). Sockets were physically disconnected when a reading of 8.9meg was read between N & Backbox. This was to investigate why there was a reading when I was expecting open circuit (OL). Ring was disconnected at CU throughout testing. Initially the readings were taken with a Kewtech plug, by crossing live and neutral and visiting each socket and taking readings (R1 and R2).

 

[Andy™]

why are you using a multimeter?

 

[davetheglitz]

As you are using a multimeter - is it possible that you were holding the terminals on the neutral and touching the backbox - meaning you were making the circuit? People tend not to do that with 500v insulation testers!

 

[kme]

Sensible people tend not to do that with 500v insulation testers!

ROTFWL ROTFWL ROTFWL

Good point DTG, by the way

 

[pan]

DTG - I made sure that I wasn't completing the cct. Even with all sockets disconnected and removed with the multimeter connected between N and the back box I was still getting 8.9m ohms. this is what has caused me some confusion. The only assumption i can make is that somehow the insulation has broken down or the PVA used whilst plastering is causing this reading. I will take some readings and post them later.

 

[kme]

pan: try taking the insulation readings with the correct tester, rather than a multimeter. The multimeter is getting that reading when pushing (max) 9V around the circuit - it needs to be tested with over 50X that (500V)!

 

[initforthemoney]

You should not be using a multimeter at all for installation testing.

Jeez....

 

[JUD]

My readings were taken with a Fluke multimeter set a continuity (ohms). Sockets were physically disconnected when a reading of 8.9meg was read between N & Backbox..

I'm still confused :C :C

You say your meter is set to continuity but you are getting readings in MΩ

 

[Hawk81]

I'm still confused :C :CYou say your meter is set to continuity but you are getting readings in MΩ

i was gonna ask the same question?

 

[paul b b]

pan: try taking the insulation readings with the correct tester, rather than a multimeter. The multimeter is getting that reading when pushing (max) 9V around the circuit - it needs to be tested with over 50X that (500V)!

i think he is trying to do a r1+r2 on the ring final circuit, hence why he has the conductors crossed.

 

[kme]

Jud: if he`s using an autoranging multimeter, he`d get the results he describes. (Wonder if it has a current Calcert?)

Paul - mmmm, there was that, but what relevance does that have to a test lead application between rn and an extraneous-conductive part??(i.e. metal back box {pattress}? )