| 摘要 |
<p>PURPOSE:To facilitate leading out of core wire by employing such power cable as a plurality of cores are SZ stranded alternately and a sheath is applied thereon. CONSTITUTION:A composite heat and electric energy transfer pipe is formed by laminating a pair of thermal medium transfer pipes 10 composed of a thermal medium transfer pipe 12 applied with a thermal insulation material 13 and a power cable 20 in bag shape then stranding them and covering with a sheath 15 together with a medium 14. When the stranding pitch P of three cores 3a, 3b, 3c in the power cable 20 is set to be six times of the core diameter (d), for example, the actual length of the core is longer by 17% than the cable length. Consequently, the core can be pulled out by 17% of the pitch when an SZ stranded wire is employed. By such arrangement, the wire can be branched easily.</p> |
