The cables are called NYM in Germany. Can be stapled to walls (typical residential update work), run on spacers or be installed in conduit like in the pictures (typical industrial style, also widely used in basements, garages,...).
Concerning the Schuko sockets... my personal guess would be IP44, no idea about the brand.
The wiring next to the red CEE socket is somewhat sloppy, but not too uncommon.
That meter enclosure makes me suspect a _real_ paranoid PoCo! I've never seen anything like that.