XLPE Cables with Aluminium Laminated Sheath

Single-core power cables with aluminium laminate used as radial watertight need qualified solutions and instructions regarding grounding. There is often lack of information from the cable suppliers regarding the importance of proper connections and use of sufficient cross section of grounding wires. The aluminium laminate must be considered as a conducting screen together with the copper wire screen. If the copper screen and laminate are not properly connected at cable joints, end terminations, grounding points etc. cable failure can occur due to heat development caused by induced currents in the screens. Instructions in standards states that any conducting element shall be grounded.