Thanks for the video. As an adult learner these videos are very useful and I look forward to Part 3. I understand the need to remove loads, neons etc and that it is permissible to link L and N together and check IR between that and E. On the other hand, if I get a reading of >999 between L and E and >999 between N and E can I not assume that between L and N will also be >999?
HI GrumpyGrampa. If you are testing with L and N together to earth , you will have no idea if they have an insulation resistance issue. All you will know is that they do not have it to earth, as they are in effect one conductor. In T and E, if you have damaged insulation on a live conductor, it will often appear on the CPC as that is a bare conductor, and can bridge that gap. But it could also be the case, that its only the L and N in close contact. Imagine in a back box for example, when the conductors are no longer in the sheath. The L and N could easily be damaged. They have no contact with the CPC, or the earthed back box. but the do with each other. Hope that make sense. thanks for watching.
@@JPElectricAt 3:21 please when testing the cable before installation, won't it damage the cable because of how it's being coiled around the case to form inductor
