Single Neutral Wire Is In Same Hole As Cold Water Mains

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Whilst inspecting an issue with a random outside hole I find a single neutral wire coming up the same hole as the cold water mains.

upload_2020-8-17_17-10-53.png


Presuming this was just an offcut by the electrician I tried removing it. The cable pulled out a few inches and is then stuck solid. I tried using an endoscope camera but I can't see what is trapping the cable or where it goes, or if it's part of T&E.

Maybe it is just an offcut that's trapped by the inlet pipe? Any ideas?
 
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It looks like just blue plastic, rather than blue cable in the photo. Are you seeing a copper core?

If so try a voltmeter on 250v ac range, between the core and the screw of a socket - any voltage present at all? If a neutral, then it may have a few volts, 10 or maybe 20v.

If none - Put it on the continuity range and see if there is any continuity between the same points.
 
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Fair point. It could be live. Maybe someone has used it as an earth.

So what do I do with it?
 
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