H07V-U
Single core non-sheathed power cable with solid conductor for general use.
installation in surface mounted or embedded conduits, or similar closed systems; suitable for fixed protected installation in, or on, lighting or control gear for voltages up to 1000 V a.c. or, up to 750 V d.c. to earth.
Not suitable for: direct or indirect burial, laying outdoors or in wet environments, unprotected laying, or laying under plaster.

Further instructions and guidance for use are given in the EN 50565 standard.