R2 help please

[davie spark]

Sorry, we seem to be posting ahead of each other anticipating what the next 'reply' is going to be. I would try an insulation test on the 3 circuits with all cable disconnected to confirm whether or not there are N-E faults present. If there are N-E faults then your parallel path is via the N-E fault/s and the neutral bar. i.e. E to N fault in one circuit, linking at the neutral bar then N to E fault in the other circuit thus linking the two CPCs under test.

 

[pencilpusher]

OK. I will do these tests and update tomorrow probably. Thanks for your time with this. PP

 

[davie spark]

This is getting more strange by the minute, all the 3 circuit cables are disconnected at both the consumer unit and cooker unit, immerser switch and whatever the central heating connection outlet/socket, and you are still getting continuity between the disconnected CPCs is that right?

 

[davie spark]

Yeah ok' I'll look in tomorrow but I'm thinking now that some cowboy wired the house 10 years ago and there may be something sinister going on like a huge non compliant joint hidden under the floor somewhere. Hope not though.

 

[pencilpusher]

This is getting more strange by the minute, all the 3 circuit cables are disconnected at both the consumer unit and cooker unit, immerser switch and whatever the central heating connection outlet/socket, and you are still getting continuity between the disconnected CPCs is that right?

No that's not right. I did not disconnect all three cables but I will and so the IR tests of all three.

 

[pencilpusher]

Yeah ok' I'll look in tomorrow but I'm thinking now that some cowboy wired the house 10 years ago and there may be something sinister going on like a huge non compliant joint hidden under the floor somewhere. Hope not though.

If they did, it was an approved contractor doing all the new builds! I will reserve judgement until I have done all the tests. I have already found IR value of 1.5 M ohms on the two RFC's. Its a new house just about!!

 

[kung]

When carrying out continuity tests care should be taken to locate and disconnect where practicable any extraneous conductive paths connected in parallel to the installation.

 

[pencilpusher]

When carrying out continuity tests care should be taken to locate and disconnect where practicable any extraneous conductive paths connected in parallel to the installation.

I did disconnect cpc's at both ends so thought I had complied with that!

 

[Octopus]

If you're disconnecting the CPC's I'd recommend disconnecting the L & N's on each circuit in turn so you can be sure that you have the correct ones matched up.

 

[kung]

Soz misread your post