A power cable is an electrical cable, an assembly of one or more electrical conductors, usually held together with an overall sheath. The assembly is used for transmission of electrical power. Power cables may be installed as permanent wiring within buildings, buried in the ground, run overhead, or exposed. XLPE insulated power cable has a number of advantages over paper insulated and PVC insulated cable.XLPE cable has high electric strength,mechanical strength,high-ageing resisting,environmetal stress resisting antichemical corrossion,and it is simple construction,using convenient and higher operating of long term temperature.It can be laid with no drop restriction.