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Thanks evans electric...you learn something every day!.. :) That would well make sense in that house...i discovered a radial socket circuit that used to be an old cooker circuit. The cabe was twin only, so when it was changed to a socket, someone ran a 4mm earth cable all around the kitchen and...

Thanks ProDave...So a TNCS should read continuity between N incomcer in CU and the head E terminal yes?...But in a TNS won't you still get continuity as they are connected at the transformer end?..and if so is it just then a case of tiny reading (TNCS) versus big reading (TNS)??...or have I lost...

Many thanks NozSpark..just what I thought.. & I agree with the numptie notion..some of the other things on the last PIR from just 3 years ago are scary...even to my newbie eyes...I wonder if he even came into the house!...hmm, and he was a registered spark with an organisation that vaguely...

Wonder if anyone can help?... Doing a pfc test on a domestic supply and getting readings of 1.88kA L-N, and 0.86kA L-E.  This surely suggests it is a TN-S system?...and yet the last PIR on the property states it is a TN-C-S supply. The reason for confusion is that the main incoming cable is a...