There is a fault, but not necessarily reversed polarity.So I'm assuming that the circuit is at fault unless the tester has a mind of its own and is taking the **** out of me
Maybe - I certainly agree these plug-in testers can sometimes give odd results with 'unusual' faults, so that a second opinion from different kit would be advisable. Having said that, I would have thought that reverse polarity was probably one of the easier things to detect, requiring (as well as other things) something approaching full supply voltage to appear between neutral and earth (so seemingly unlikely to be caused by a 'poor earth').I vaquely recall getting reverse polarity showing once, I think it turned out to be a poor earth, im quessing the electronics could not decide, due to the poor earth. if the circuit was ok, or that was no earth present, thus opting for reverse polarity. ... I would get a second opinion using a 2 pole voltage tester
I haven't thought all that deeply, but, at first sight, I can't really see how any sort of plug-in tester could possibly detect a N-E reversal, particularly in a TN-C-S installation, where the two are joined at the cutout. Indeed, other than end-to-end continuity tests on a disconnected circuit, I'm not sure how any sort of testing could detect it in a TN-C-S installation (and not necessarily that easy with TN-S).Given that one of the faults they can't detect is a neutral earth cross, is this another source of incorrect indication?
Indeed.Despite Ban's comments on a quick, easy, temporary repair, I feel I must sress that the BEST advice would HAVE to be to get the wiring put right CORRECTLY, so the right COLOURS are in the right terminals AND the POLARITY is 100% correct.
Sure - as I said a couple of posts back, it's one of the easiest things for these little gadgets to detect (provided a viable earth is present).They can't. ... But they can detect a L-N reverse.
to a situation where the tester is flagging a L/N reverse?I haven't thought all that deeply, but, at first sight, I can't really see how any sort of plug-in tester could possibly detect a N-E reversal, particularly in a TN-C-S installation, where the two are joined at the cutout. Indeed, other than end-to-end continuity tests on a disconnected circuit, I'm not sure how any sort of testing could detect it in a TN-C-S installation (and not necessarily that easy with TN-S).Given that one of the faults they can't detect is a neutral earth cross, is this another source of incorrect indication?
Kind regards, John
Absolutely no relevance, as far as I can see. As you will be aware if you have read the thread, I was responding to:So what's the relevance of this: ...................... to a situation where the tester is flagging a L/N reverse?
Given that one of the faults they can't detect is a neutral earth cross, is this another source of incorrect indication?
Ask westie, not me.Is what "another source of incorrect indication"?
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