Insulation cable

An insulation cable comprising:

• a composite stranded conductor, and
• a sheath layer formed of a material classified in ISO 6722 Class F and sheathing the composite stranded conductor, wherein
• the composite stranded conductor comprises a center stranded cable having at least one stranded cables, a first-layer assembled stranded cable formed by final-twisting a plurality of stranded cables arranged to surround a circumference of the center stranded cable, and a second-layer assembled stranded cable formed by final-twisting a plurality of stranded cables arranged to surround a circumference of the first-layer assembled stranded cable,
• a final-twist direction of the first-layer assembled stranded cable is the same as a final-twist direction of the second-layer assembled stranded cable, and
• wires included in the stranded cables of the center stranded cable, wires included in the stranded cables of the first-layer assembled stranded cable, and wires included in the stranded cables of the second-layer assembled stranded cable have a tensile strength of 90 MPa or more at an ambient temperature of 200° C. or less, and
• the material forming the sheath layer contains silicone rubber.