No cpc continuity on ring final

[flukeyspark]

Hi all,

Had a call from a customer saying her oven had broken. When the oven engineer went out he fixed the oven but told her she had "no earth on her kitchen sockets".?!?! He told her the other circuits ie the lounge and cooker, were ok but no earth to the kitchen ring final?! How can this be? Does he mean no continuity? Im confused....If it is continuity, and the earth is broken, and its not at a socket, probably a junction box under the floor, is it safe to lower the breaker from 32a to 20...Or spilt and make 2 20a radials...
Strange.....

 

[nickblake]

there is a possability that the cpc have popped out of the terminals in 2 places the easiest way to find it is to carry out your ring main tests to confirm continuity of the legs if the cuircuit cpc is open circuit carry disconnect the circuit tails from the board join the live and cpc together (lever wagos are great for this0 carry out an r1r2 test at each point using the plug top lead till you find the open circuit at the socket then check the connection of the socket ,dont forget the circuit tails will have to be remove from the board to do this and only link one end of the circuit L and cpc together

 

[Farmelectrics]

No it isn't doesn't matter what size breaker if there's no continuity on CPc you need to split ring and find out we're it's failed

 

[Octopus]

I'd wander round the sockets doing EFLI tests and watch the results, write them down and you should find a good place to start

 

[Edd]

as murdoch says EFLI,, highest readings normally points the way!!!

 

[flukeyspark]

Thanks everyone for your comments but as this is an old property i feel its been chopped and changed over the years, maybe j boxes under floors etc...I fear the customer doesn't want floor boards pulling up..what happens then?

 

[Octopus]

Thanks everyone for your comments but as this is an old property i feel its been chopped and changed over the years, maybe j boxes under floors etc...I fear the customer doesn't want floor boards pulling up..what happens then?

Until you've established what any issues are, you're simply pxxxxxxx in the wind.

 

[telectrix]

well, you start with the accessible places ( socket outlets ) and narrow down the fault, as has been sais earlier. if no luck, then you have to ask client whether or not to proceed pulling up floors. stress the safety issues, but if they say no, just charge for time and walk.but get them to sign to the effect that they don't wish you to continue searching for the fault.

 

[Knobhead]

You won’t thank me for this flukey, but I’ve had a look at your previous posts. Those along with this post really make wonder if your up to the job.

Have you left this person with sockets still live with no CPC?

 

[flukeyspark]

Ive not been to the property.....ive not worked here either..its a phone call from a worried customer....and isnt this what forums are for Tony? Whats your advice?

 

[Knobhead]

Let me get this right, your wanting advise on a fault you haven’t even seen?
View attachment 10675
Sorry but my holistic helmet is still away for repair!

 

[micknew]

The training you received should tell you the way tackle this problem if you are an electrician.
You may find the problem very quickly so don't panic.

 

[flukeyspark]

a customer called me saying a hotpoint engineer had been to fix her oven, he did some tests and in his/her words found "no earth on the kitchen ring final"...That's all I know until l go and look tomorrow.....I was just getting feed back on this...if anyone had found similar problems....

 

[Knobhead]

Hotpoint help line 08000 921 922

 

[Guest111]

I am sure we have all had earth faults before and they can be caused by a number of things could be earths out in db however if there is no earth then the system is unsafe and you could be opening a big can of worms for yourself,if your not confident about it leave well enough alone and pass it to someone with more experience,my old apprentice still rings me if he is ever in doubt.remember pride comes before a fall and a court case usually follows an electrocution.not having a go mate just trying to point out the worst case scenario if it bites you.all the best