A three phase gas pipe cable is disclosed which has at least one gas pipe cable section in which three phase conductors are arranged in a triangular configuration within an enclosing pipe. Each phase conductor is supported by at least one supporting insulator such that the longitudinal axis of each phase conductor is substantially parallel to the longitudinal axis of the enclosing pipe. The supporting insulator is connected by a slide bearing member to the enclosing pipe. The slide bearing member accommodates an insulator foot end of the supporting insulator in such a manner that the supporting insulator is capable of motion in the direction of the longitudinal axis of the enclosing pipe. When the phase conductors linearly expand as a result of differential heating of the phase conductors, each phase conductor is free to expand in the longitudinal direction thereby moving the supporting insulator associated with each individual phase conductor a corresponding amount in the axial direction with no detrimental mechanical effects to any part of the gas pipe cable. A single compensator for each phase conductor in each gas pipe cable section is sufficient to absorb the thermal expansion of each phase conductor.
