PURPOSE: To obtain resistant quality of a trolley wire against high temperature and humidity and corrosion further facilitate its laying work, in the trolley wire for remote control internally and externally of a nuclear reactor container, by coating a conductor with block-shaped insulator elements and covers mounted with a supporting metallic material.

CONSTITUTION: A remotely controlled vehicle is fed with electric power form a trolley wire 23 through a pantograph. The trolley wire 23 consists of a short cut conductor 34, block-shaped insulator elements 33, block-shaped covers 32 and supporting metallic materials 31. The insulator element 33 is heat resistant because of solidifying glass wool with thermosetting resin, and the cover 32 is formed by metal strong and excellent in quality of high temperature, high humidity further corrosion resistance, as a result there can be obtained the trolley wire large in overall strength. Further the trolley wire, being broken into parts, can facilitate its laying work complicated in a container.