Welding Cable is an extra flexible multi-stranded copper conductor with extra flexible black neoprene (EPMD) insulation. ElecDirect Welding Cable resists oil and acid and has a temperature rating of -40°C to 90°C (-40°F to 194°F). 600V rated. SAE specification J1127. 100% finely stranded copper cable conductors are designed for all welding applications including power supply applications up to 600V AC, welding applications where a stinger/whip, leads and grounds are used, and secondary volatge resistance welding leads.