An armoured cable for transporting an alternate current (I) at a maximum allowable working conductor temperature (T) comprising: at least two cores (12) stranded together according to a core stranding lay and a core stranding pitch A; an armour (16) surrounding the at least two cores, said armour comprising one layer of a plurality of metal wires (16a) wound around the cores according to a helical armour winding lay and an armour winding pitch B; the helical armour winding lay has the same direction as the core stranding lay, the armour winding pitch B is of from 0.4A to 2.5A and differs from the core stranding pitch A by at least 10%.