Erroneous test during pre testing

[Macca65629]

Hi,
While doing the Erroneous test during my pre test I came across abit of a headache.
When I was doing a lighting circuit it was coming in a short eg. 0.04ohms but once I disconnected an LED light in a bathroom it went away, same with socket circuits which had USB sockets connected on them, is this normal or am I getting something wrong ?? Everything else is fine rp+re and IR test between you phase&neutral to earth.
I had all mcbs up in the on position except the circuit i was testing and went from the phase busbar to the top of the mcb I had switched off.
Thanks

 

[RMS Electrical]

@RMS Electrical can you keep your problem to the thread you started on the same issue to save confusion.

Still navigating around this site, so excuse me if I changed lanes

 

[RMS Electrical]

For those wondering, as I myself was a minute ago, I think this is an extra test required in Irish regs to detect inter-connections between circuits.
I believe it's a (dead!) test between the busbar with all but one MCB on, and the outgoing side of MCB.

Not having ever done this myself, I'm still working out how this works as there will be resistances through any connected loads back to the N bar, back through other loads to the other MCB and the bus bar. So I'm wondering if you are supposed to have N's disconnected for this test?
Please can a RECI put us out of misery!

Hi Tim,
In response to your request for a RECI to explain Irish completion certification, go to:

Completion Certificates - Contractors Area

Note: To submit your electronic certificates, please click here. The Electricity Regulation Act 1999, as amended, makes it mandatory for a Registered Electrical Contractor (REC) to issue a Completion Certificate for all electrical works (excluding minor works). If a REC carries out minor...

safeelectric.ie

Regards Robert
RMS Electrical

 

[timhoward]

Hi Tim,
In response to your request for a RECI to explain Irish completion certification, go to:

Thanks Robert, and welcome!