Insulation resistance problem

[ruston]

It's nice of of you to thank everyone . Not everyone has the courtesy or manners to bother.
Well done anyway.

 

[andyb]

Whilst it is usually Mega for millions only Megohms is correct for referring to millions of Ohms (Megaohms is NOT correct).

Megathanks for that

 

[PEG]

...It does make you think,just how many times worse,a megalomaniac is,in relation to a basic maniac...

 

[Jay Sparks]

Although the fault has been found, I am still a bit confused about the fact the OP split the ring and got the 0.00 reading on both legs, yet the OP only mentions one plaster board screw through one cable!!?? I can only assume that the OP connected the ring circuit back at the cu, then split it at the mid point, thus creating a radial??

Please correct me if I have read the other posts correctly, I have a bad hang over this morning, so I'm not totally compus mentus (not even sure this is the correct spelling)!!

Cheers

Jay

 

[Richard Burns]

Despite you being non compos mentis, a good thought.:17:
I had not thought of that particular scenario to account for the readings discrepancy.

 

[David M]

Although the fault has been found, I am still a bit confused about the fact the OP split the ring and got the 0.00 reading on both legs, yet the OP only mentions one plaster board screw through one cable!!?? I can only assume that the OP connected the ring circuit back at the cu, then split it at the mid point, thus creating a radial??

Please correct me if I have read the other posts correctly, I have a bad hang over this morning, so I'm not totally compus mentus (not even sure this is the correct spelling)!!

Cheers

Jay

That's what confused me also. If the ring had been split into 2 separate legs then surely one leg would be clear of fault, or have I missed something also?

I have only come across multiple short circuit faults on a new install twice before.

Once it turned out the apprentice at the time had pinched a few cables when fixing back the front plates.

Second was a faulty batch of cable, this turned out to be a right pain to sort in the end, extremely annoying!

At the time I couldn't believe it could be the cable and spent a good while trying every other option. Eventually I pulled out a leg between 2 sockets and stripped back the sheath to find the insulation very thin and missing in some places on the live conductor. Nightmare! :frown2:

 

[Midwest]

Although the fault has been found, I am still a bit confused about the fact the OP split the ring and got the 0.00 reading on both legs, yet the OP only mentions one plaster board screw through one cable!!?? I can only assume that the OP connected the ring circuit back at the cu, then split it at the mid point, thus creating a radial??

He could only have done what you've suggested, split the RFC at a socket and left the legs connected at the CU or Vicky-Vercky! If the RFC was disconnected at the CU the fault would of been isolated from the rest of the installation's other circuits?

 

[Dan]

Don't mind me while I bump some old threads. Just doing the rounds. Ignore the thread if it's not current topic, it'll soon drop off the list, but if the thread interests you, feel free to reply.

 

[David M]

Don't mind me while I bump some old threads. Just doing the rounds. Ignore the thread if it's not current topic, it'll soon drop off the list, but if the thread interests you, feel free to reply.

You monkey, like a dozy git I read through the entire thread not realizing I'd already posted in it and then only checked the date on the very last post!

 

[Dan]

You monkey, like a dozy git I read through the entire thread not realizing I'd already posted in it and then only checked the date on the very last post!

It's okay. Part of the intention is to dig up some gems. As I don't know much about sparky stuff, I can only check stats for the threads and see what used to have a bit of traffic and doesn't now. Assuming it's just got lost a bit over time.