[en] As an important bulk material of nuclear power plant, cable is of large dosage, widely used, mainly used in the reactor buildling, auxiliary building, turbine building and BOP of the plant, laying way of cable generally use cable tray, pipe or cable trough. Nuclear power engineering cable must have reliable service life, thermal stability, moisture resistance, chemical stability and radiation resistance, provided the reliable safeguard for the safe operation of the plant. AP1000 as the third generation of nuclear power technology nuclear power plant, compared with the second generation nuclear power technology, puts forward higher technical requirements on cable, this thesis will analyze the reliability of the cable inside the shell combining with the characteristics of AP1000 nuclear power plant cable structure, characteristic and test requirements. (author)