/diy/ - Do It Yourself

>>2744738
I metered it, looks like the power circuit comes in on the right side and the left side goes up to the ceiling light. The red wire on the left is unused, so there is no ground.

I found a beefier extension cable I had in storage, model info:
(UL) SJTW E92770 VW-1 75C 16AWGX3C C(UL) SJTW 16AWGX3C 60C FT2
Looks to be 16 gauge wire, while the wall single core is 12 gauge I believe. Is this cable any better than the amazon one I linked https://www.amazon.com/gp/product/B07N4PMQS3 or are they both still too hacky to risk? What's the dangerous part of using an extension cable, the fact that it's multi strand? or the thin gauge?