BS7671;2018 Minor works certificates.

Graham Kenyon:

Chris Pearson:

Graham Kenyon:

John,


In general, I don't really disagree with you, but ...

If an RCD does not trip at 1 x Idelta n then it is defective. This softer test is a better indicator of RCD health than the 5 x test and consumer safety.

This does not unfortunately take account of a small number of cases where the RCD passes a 1x test, but then goes on to fail a 5x test, although I agree this is not simply a case of "sticky RCD".

For my own peace of mind, at home, I would wish to be assured that an RCD does trip as intended. If passing at 5x means that one will also pass at 1x, then all well and good: only the one test is required. However, if not, then surely both tests are required.


Of course, there is no reason to stop doing the 5 tests, it is just that only one time needs to be recorded in the EIC/EICR (plus the all important test button).

I'm still not satisfied.

Graham Kenyon:

Chris Pearson:

Graham Kenyon:

John,


In general, I don't really disagree with you, but ...

If an RCD does not trip at 1 x Idelta n then it is defective. This softer test is a better indicator of RCD health than the 5 x test and consumer safety.

This does not unfortunately take account of a small number of cases where the RCD passes a 1x test, but then goes on to fail a 5x test, although I agree this is not simply a case of "sticky RCD".

For my own peace of mind, at home, I would wish to be assured that an RCD does trip as intended. If passing at 5x means that one will also pass at 1x, then all well and good: only the one test is required. However, if not, then surely both tests are required.


Of course, there is no reason to stop doing the 5 tests, it is just that only one time needs to be recorded in the EIC/EICR (plus the all important test button).

I'm still not satisfied.