The NH-WEP Series comprises rolling stock cables with a rated voltage of 30 kV, and which are expected to be used mainly in high speed rolling stock. Using technologies that incorporate covering materials that have been developed in the manufacture of various types of electrical wires and cables, and by adopting covering materials such as cross-linked polyolefin, we have succeeded in the production of halogen-free wires and cables with the same features as conventional products, while satisfying the fire resistance, toxicity, and smoke emissions criterion required by the British Standard.