The present invention concerns a cable for use in a predetermined voltageclass, said cable comprising: a conductor; an insulating layer surroundingsaid conductor, said insulating layer having a thickness selected to provide apredetermined electrical stress when the cable is operated at a nominalvoltage comprised in said predetermined voltage class, and a protectiveelement around said conductor having a thickness and mechanical propertiesselected to provide a predetermined impact resistance capability, saidprotective element comprising at least one expanded polymeric layer. Theinsulating layer thickness the protective element thickness are selected incombination to minimize the overall cable weight while preventing a detectableinsulating layer damage upon impact of 50 J energy. The present inventionfurther relates to a method for designing a cable.
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