John,

Well said, no need for Hi Pot. or breakdown stats, just a simple megger test, when i started the trade, we were required to megger all new wiring, now today with hurry up just get it in, breakdown testing is a lost art.
Yes, the testing was done by the manufacture of the cable, that was before it was thrown off the truck, stepped on, scraped, pulled, and hammered on.
As i look at the new construction wiring installed today, i wonder how much worse it can get.