Non-resettable thermo-sensitive cable. Maximum temperature alarm signal at 68°C ±3°C. Maximum operating temperature 40°C. Resistance 300Ω/km. Maximum operating voltage 100V DC. Twisted cable. Red outer thermoplastic sheath. Outer diameter 4.2mm. Weight 24kg/km. Pack: 100m coil. EN 54-28 compliant product. Cable compliant with European CPR regulation EU 305/11.