Yakov wrote:
On internet, where can I find a table that lists the current,
in ampers, that given flex wire can carry ? Specifically, I'm
interested in amps rating for 2x1.5 sq.mm. and 2x2.5 sq.mm
(220V). I tried to google no luck so far.

There's many such ratings and you'll have to determine what you want.

Google for "fusing current" to find one extreme.

Actual current in an application depends on ambient temperature,
conduit and another conductors in the conduit, wire insulation,
insulation type, desired life of insulation, etc.

If the wire is wound into coils (like for a motor or resistor or
inductor) then geometry becomes crucial.

1.5sq mm wire seems to be about like 22 gauge which is sometimes
optimistically rated for 5 amps (it will be getting warm at that
current).

Tim.