Tough Rubber Sheathed Welding Cables General Service Welding Cables Copper/Aluminium are drawn from high quality raw material “wire bar of MMTC”. Then rope lay stranded, soft annealed to get maximum flexibility. Polyester tape is used as a separator. Finally insulated with an extra tough, abrasion – proof rubber jacket of high tensile strength. The welding cables are inspected every time by performing tests like conductor resistance test, High Voltage test (water immersion test), Spark test, Static Flexibility test and Flammability test. Every batch shall be issued with a Test Certificate as a confirmation of accomplishment of all such tests.