Self Regulating Heating Cable. Available in 30 metre rolls or by the metre. Bus wire: nickel-plated copper Metallic braid: tinned copper Outer jacket: OJ, polyolefin (optional) Minimum bend radius @ -150C: 10mm Supply voltage: 240 Vac Circuit protection: 30 mA ground-fault protection required Maximum continuous exposure temperature: power-on: 65ºC; power-off: 85ºC. FLX self regulating heating cables are designed to provide freeze protection for a variety of coolroom, refrigeration and freezer applications. The narrow profile of FLX cables provide the flexibility required for freezer door applications.