To provide a cable which can surely detect the fusion of a metal wire and easy to distribute with a simple structure by stranding a tensile strength line having a non-elastic insulating film with a metal wire fused at a prescribed temperature at a prescribed pitch to form a core wire, providing a protecting tube around it so as to provide a cavity between the core wire and the protecting tube.

A tensile strength line 1 having a non-elastic insulating film is stranded with a metal wire 2 fused at a prescribed temperature at a prescribed pitch to form a core wire, and a protecting tube 3 is provided around it so as to provide a cavity between the core wire and the protecting tube 3. As the non-elastic insulating coating material, any non-elastic insulating material having the heat resistance of the fusing temperature or higher of the metal wire can be used, and fluororesin is particularly preferably used. As the internal conductor, a tinned soft copper wire, nickel-plated soft copper wire or the like can be used. The metal wire can be selected from a low melting point alloy, solder wire or the like which fuses at a prescribed temperature.