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Identify electric thing in my cupboard.

What is this electrical thing in my cupboard?

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Wayne88
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It is a high voltage, very high current terminal.  

Can you get a better picture of the right side?  It looks damaged.  

It is too high current / voltage for a consumer setup (even power meter which is usually 100 amps and sometimes 200 amps)
If you are in the UK, the 415 volt capability may be for 220 V one side of three phase voltage (lower than 440 V single phase)
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440v ??

Interesting, where is that used as domestic supply?

I'll dust the spider webs out and upload another photo tomorrow, at the moment I'm scared of this thing since I have been told that I do not understand AC.
If you are in the UK, the one leg 220V plus the other leg 220V adjusted electrically for the phase difference is going to be around 400V.

When the two legs are in phase the sine waves add so you get 440V

Here, 120 doubled is 240V . I have such an outlet to run a 1 HP air compressor efficiently.
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Presumably you are in the UK, as that is where Henley electrical products are used.

In the US we would call this a "main disconnect."  Henley calls it a "house service cutout."  All power to the entire house can be cut off by pulling out the 100 amp fuses (the three items labeled "100A".)  Yours is black; newer ones come in white.

https://www.wt-henley.com/low_voltage_fusegear-house_service_cutouts.html
Given the security tags on the device perhaps it's a metre setup for the utility that reads consumption along with the 100 Amp fuse blocks.

The right side there looks a bit scary.

And yes, it's my preference to kill the line breaker/fuse or the main breaker/fuse before mucking about with A/C.
Philip - you and I are in the same country (120 / 240V), but I think that photo originates in the UK.
It might be asbestos board, it's been painted so many times to tell what's underneath. It is in UK.

Right side photos tomorrow once I have evicted the spiders.
Be careful. In it own way, asbestos is more dangerous than proper procedures around AC voltage.

If it is asbestos, use a face mask certified for asbestos fibers
I think the cables going to the other flats are asbestos insulated as well, they used to connect to my ancient consumer unit but were rerouted to this cut-off when the place was converted.