The tendency in high (HV) and extra high (EHV) voltage applications is towards bigger cables, up to diameters of 200 mm. To reduce the outer diameter of the cables, a smooth Al-sheathing has been introduced as an alternative to the conventional corrugated metal sheath. To guarantee necessary adhesion between the smooth Al-sheath and the PE- sheath, an adhesive layer is applied between the two. Mos...