Mark Levinson amps had an ad campaign in the 70's, where they welded with the output of one of their high current output SS amps.
This impressed me.
When I bought my latest amp, a high current output SS amp, I decided to get cables that were heavy enough to use for welding.
On the packaging for the cables, it was suggested that you not use the cables for car battery jumping or welding, as that would void the warranty.
Cables by Analysis-Plus, Bi-Oval9 9ga, oval woven copper, supported by an oval teflon core, and insulated by teflon. Massive T1 spades. Serious cables.