Are CCA cables marked with the equivalent cross section of solid copper wire?
Here's the backstory:
I recently got a cheap stick welder and decided to swap the ground clamp with a better one.
The ground cable had 10mm^2 printed on its side, so I got some heavy duty 10mm2 cable lugs to fit on the end so I could screw it on the new clamp.
I stripped the end of the cable, and something felt wrong about the copper strands. Yep, it was CCA, not solid copper and I verified it by heating the strands with a lighter.
Anyway, I proceded to install the lug and realized that it wouldn't fit. The wire gauge was actually 16mm^2.
Was the cable mislabeled or is it a common practice to mark CCA cables with a lower than actual cross section area?