IR reading

[nc12345]

Hi guys job today for nuisance rcd tripping ,I thought it was an appliance as I explained in a post yesterday but turns out it wasn't . Anyway disconnected the only neon I could see , unplugged everything run an IR test ,great neutral to earth but earth to live 0.02 . Checked every socket , I found a few oxidised cables and gather there's a few joins due to single cables at various sockets . Would there be anything I'm missing that would give me a reading of 0.02 ? I realise with the oxidised cables it should be rewired but I got a perfect reading on the earth to neutral and would presume if the cables had deteriorated that much surely it would of affected them all in some way ?
Also tried a ramp test but it would instantly trip ?
any ideas would be much appreciated .

thanks to any replies in advance

 

[trev]

Are you talking about 0.02 ohms or 0.02 meg?
I'd be thinking about hidden JBs in your position, is the bloke going to rewire?

 

[IzzyS]

Check the IR of the socket outlet, disconnected from the wiring, particularly where the cables are oxidised - damp is the likely culprit.

 

[HandySparks]

Also tried a ramp test but it would instantly trip ?
any ideas would be much appreciated .

If necessary, disconnect the circuit from the RCD before ramp testing.

 

[MDJ]

Something stinks here, I don't get the OP at all, start again lol

 

[telectrix]

L-n @ 250v?

 

[stevethesparks]

Split the ring, if you still get 0.02 on one leg the short should be 2.74 mts from where you are measuring from. I would get a wander lead and start checking between both L&E and dabbing on recent nails and screws etc.
Thats if we are talking ohms

 

[guest119]

Central heating pump faulty.
What has a neon got to do with it?
Test with L and N together, to earth, this should show your fault.
DB off ofcourse.
ramp test with RCD outputs disconnected, not just breakers off!

Boydy

 

[nc12345]

Hi guys thanks for all the replies
didn't even think about ramp test with the faulty circuit removed Doh !
The heating pump is on a separate circuit and I tested at 250v just incase I missed an appliance.
The guy doesn't want to rewire but I would still like to get to the bottom of this all the same.
Thanks again

 

[trev]

I always do a test at 250v to make sure nothings been missed then I give it a full blast at 1k

 

[guest119]

Ah youre back Trev, that didnt take you long.
What you doing with the 1k?

Boydy

 

[trev]

I'm gonna spend a lot of it on beer and drugs, the rest I'll just waste

 

[R46yam]

Can I ask what was the outcome from all of this? Did you find out where the fault was?

 

[telectrix]

think it was around glasgow somewhere.:81:

 

[SPARTYKUS]

I'm gonna spend a lot of it on beer and drugs, the rest I'll just waste

Wasn't that a great quote by George, Im suprised he made it to 59. I had a stint helping my uncle deliver props around London in my teens, we were on the Kings Street once and saw this bloke nissed as a pewt with cowboy boots on and a leather jacket holding up some railings, my uncle got really excited and said " thats Goerge Best"

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George even