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Not that many. I'm more concerned about why it is like that to be honest - we have just had a new consumer unit put in, wiring sorted and certified so if there's not an obvious reason it's worrying me a bit. The electrics are all behaving perfectly though and have been checked out so maybe I just shouldn't worry?
Thanks all. A non-contact voltage testing pen is suggesting it is still live. You might think ah well that's the tester (I know not to rely on them and should really be using a voltage tester but it has been totally reliable so far) but the lighting circuit also covers our shared hall and I replaced a lightswitch there recently and it was the same deal (I had to turn the whole fusebox off to get negative readings from the testing pen).
So I guess that means it's not ghost voltage? Is shared neutrals the most likely scenario? It's not two way switched though?
We've just had the consumer unit replaced and wiring sorted out so rather than just not wanting to reset clocks etc. would like to know if it's not meant to be like that.