Prev. owner: "Hey the light worked, I used a box, what's the problem?" [Linked Image]

I think Trumpy's right, that doesn't look like welding cable to me either...look at the close-up of the terminations, the strands look too big to be welding cable. It looks more like some really old fabric-covered NM (6-3 maybe?) with the covering removed.

Whomever did the service change should be forced to correct this!!

Stupid should be painful.