addition to ring

[scott 123]

added sockets to existing ring worked all tests produced good results yet after 10 mins of power being on rcd trips cannot reset until ring neutrals are disconnected

 

[SJD]

Sounds like a N to E fault somewhere - and not necessarily on this socket circuit.

Some additional information might be useful - what did "all tests" consist of, and what actually were the test results that were "good". And a description of the board configuration would be helpful.

 

[Flanders]

As above more info required You could of trapped a neutral at one of the new socket or when you pulled the new cable in you could of burnt the cable against another one or there may be too many appliance now with high earth leakage on the circuit, did you get good IR results

 

[scott 123]

As above more info required You could of trapped a neutral at one of the new socket or when you pulled the new cable in you could of burnt the cable against another one or there may be too many appliance now with high earth leakage on the circuit, did you get good IR results

end to end figure of eight IR >999
L 0.74 L cpc 51.2
N 0.74 N cpc 72.3
CPC 1.04

 

[scott 123]

............. Ir >999

 

[Flanders]

The way you have wrote the reading do not read correctly

I think you mean Ring reading

Live to live 0.74
Neutral to Neurtal 0.74
CPC to CPC 1.04

and IR test
IR >999 Live to live L cpc 51.2 and N cpc 72.3

Does the RCD test OK with nothing connected

 

[scott 123]

sorry typed to quickly yes thats correct
rcd fine untill this circuit N connected

 

[Bobster]

I take it everything was unplugged for the test.

Has anything been plugged back in after?

 

[Flanders]

Is there any load on the ring circuit ,
How have you installed the new cable ( if they are with other cables the could be burnt together when pulling them in) May be worth doing IR between the ring and other circuit if this is the case
Have you checked you have noted snaged a neutral when pushing sockets back

 

[scott 123]

I take it everything was unplugged for the test.

Has anything been plugged back in after?

unplugged for test but soon after anything put on load on that circuit rcd trips
tried without sockets being pushed back still the same

 

[Flanders]

So either the appliance you have plug in has a high earth leakage coursing the RCD to trip or buy putting load on the circuit the insulation some were is braking down coursing the RCD to Trip

 

[Deleted member 26818]

Sounds like neutral and earth conductors have been swapped at one of the sockets.

 

[Pete999]

I would hazard a guess that as the RCD holds up when the N for the RFC is disconnected, and it was OK before, it's something you have caused, check from the points of addition.

 

[Richard Burns]

Perhaps just the neutral in the wrong neutral bar of the CU. It does depend on whether it trips in tens minutes after power on or whether it trips at once when current is drawn.