A process for manufacturing a multipolar cable having at least one pair of
cores, each core having at least one conductive element and at least one
layer of electrical insulation in a position which is radially external
to the at least one conductive element. The process includes the steps
of: a) assembling said at least one pair of cores so as to form an
assembled element having a plurality of interstitial zones between the
cores, and b) depositing by co-extrusion an expandable polymeric material
in a position which is radially external to the cores so as to fill the
interstitial zone and to form a filling layer of substantially circular
transverse cross section, and at least one containment layer of polymeric
material in a position radially external to the filling layer. The
multipolar cable obtained from the process.