As I have pointed out already, any and all tests leave the risk of dangerous defects being undetected. This is why testing supplements inspection and is not as important as inspection and does not replace it. It is also why care must be exercised when designing and constructing installations. If you believe that any and all faults can be found with testing - or even through inspection and testing - then that is a deeply flawed view. Periodic inspection and testing is not a perfect process - but then no human process is or can be.You remove R1 and R2 at one end of the circuit and connect together (connector not a link from the earth bar to mcb), you then go to the other end and do the same but this time you put your meter across both R1 and R2, we were taught this method as it ensures you are only testing the circuit earth and not getting erroneous readings from what could be unreliable parallel paths, if it has changed and you were taught different then that be the case but throughout this thread I have expressed that doing it as you suggest can leave the circuit unsafe for the reasons expressed, I have on several occasions now said that if we forgot which is the method used now and taught can you not see the issues I raised and in your professional opinion are you still happy to walk away from an EICR knowing you may 'maybe on a rare occasion' have left a dangerous circuit..
I understand why you use your method.
I understand that is how they teach it now
I am not arguing that it is wrong as it expressed it may just be statistically so rare that it doesn't warrant proving the actual integrity of the cpc itself but just that you have a return path that passes requirements.
All of the above I understand, it is your professional opinion I am after and do you agree that your method can leave a dangerous situation in some cases?
If the answer is yes then I have made my point although I am not suggesting you are testing it wrong, clearly those minds that decide these matters will have factored such risks into their guidance.
I note when looking around the internet I found this is actually a subject raised on many occasions over the yrs and with conflicting answers depending where you sourced it but I have seen already a couple of older threads that do have this method been mentioned and expressing they were taught that way as was I.
Please remember I came from a generation where our Megger's were wind up (irrelevant I know) and domestic electrical safety was just basic, no RCD's or Arc detection devices in sight.
There was also a drive to change all lead piping into premises into plastic, this is probably why we had to be certain of cpc integrity and also that parallel paths were taken out of the equation as many circuits were losing earthing as it was lost by upgrades to gas and water mains, I will remind you that using the piping was once the method of choice so you can appreciate the risks in isolating it with plastic incomer. I also remember this caused a lot of hassle and people were reporting getting shocks at the time, it was even on the news if I recall so they then rolled out information leaflets to get your Earthing and Bonding checked before the works were done, some companies brought their own Sparks in to survey each installation and then quoted for any additional work to correct the installation before the work could be done.
This maybe why we have very different teachings but also shows you the obvious weakness/flaw in modern testing methods, wouldn't you agree.