Superconducting (SC) cables and magnets in the past decades have enabled fundamental discoveries in the field of high-energy physic, amazing steps forward in the research on a clean energy based on nuclear fusion and a significant increase in the power transfer capability, as well as reduction of transmission loss and construction cost, for power cables. Different kinds of SC cables are available, according to the applications, based on different SC materials and different concept for their cooling (conduction-cooling, coolant bath of forced-flow). The SC cables for fusion, for instance, are mainly based on a thousand of thin strands, embedding the low-critical-temperature superconducting (LTS) material, twisted together and pulled inside a metal jacket (the so-called cable-in-conduit concept).