Safe Method to Handle and Conceal Live Cable Above Fridge?

Hi,

After removing a hanging cupboard in the kitchen, the following cable appeared to me. Its use is unknown to me, I checked with a multimeter and it is live. It is definitely a residential installation as there is no voltage when the power is cut in the flat. I consulted a colleague and he said that I could switch off the voltage without a problem, cut the cable, insulate hide and plaster, however I would prefer to make sure if this is actually a safe solution, if not, how could I get rid of this cable?

Thanks

You can, of course, cut it off and plaster it provided you find the other end (perhaps in the switchboard) and disconnect it from the power supply. Insulating and plastering it can, over time, cause the RCD in the flat to trip due to moisture. I would suggest that if you are already soldering the cable into the box, you use wago connectors and leave it in the box. If you insist on plastering, use heat shrink sleeves with adhesive caps.
https://cpc.farnell.com/raychem/enc-11-adh/en...MIx8DD-8KA5QIVlOFRCh1RlQLjEAQYBCABEgLtxfD_BwE

The colleague above has already hinted at what needs to be done. Knock out the hole under the tile box and hide the excess wire there. This could be the power supply for the cabinet lighting, but no one knows what the author of the installation had in mind here. Why cut it off when it might come in handy one day? On the other hand, why is an unused circuit live!

An "expert" electrician did the installation as far as I know. Perhaps along the lines of asterix and obelix as a door under the ceiling, he also put this wire in and hid it behind a cabinet . I'd like to avoid forging before painting (we don't want any extra "decorations" on the wall), we came to the conclusion that I'll put it in a wago connector I'll insulate it additionally and hide it behind a new shelf hung above the fridge, (I'll cut a hole in the shelf for the cable to sit there). The cable in the wall will not keep me awake at night. Will this solution be safe?

In addition, I checked and to disconnect the cable I have to switch off two plugs at the same time, could this be a hint as to what it could be used for?

As nothing to the canister or extractor hood.Byl built into the cabinet.

Pelulator wrote:

I'd like to avoid forging before painting (we don't want extra "decoration" on the wall), we've come to the conclusion that I'll put it in a wago connector, insulate it additionally and hide it behind a new shelf suspended above the fridge, (I'll cut a hole in the shelf for the cable to sit there).

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Sure, it forges better after painting

You are combining like a horse uphill. Wago, insulation, hole in the shelf, in other words, any way allowed to get as far as possible from the only valid solution.
And you dare to judge an electrician. I suggest a little humility.

Forge a hole, put a plaster p/t box in it, terminate conductors with a WAGO connector, strip or insulate, plaster, put the lid on, paint, hang the shelf and don't bother with it any more.
Maybe there will come a time when a wire will be just right?