@Tech Focus
Regarding grounding, it's not necessarily needed when working with 6a. It all depends on the cable quality/type. I'm specifically thinking of Belden (more or less the gold standard in cabling) 10GX and my personal favorite,
10GXS, which both have a polymer sheath (EquiBlock) that gives a metallic shielding level of EMI resistance but without the need to ground, while remaining fully in-spec. Absolutely bad-butt. Now, when you see the price for a 1,000 ft. roll.... make sure you're sitting down (lol), but nonetheless, it's perfectly possible to do great 6a work without needing to monkey with grounding.
TL;DR - I did some 10GX in-conduit for a guy the other week to light up his garage/workshop and he's ecstatic over the performance on that link. Granted, it's not like Monoprice would've been noticeably inferior, but nonetheless, I love using the best stuff whenever possible.