Looks like the dirt and floor wax in this "Gem Box" have added more insulation?

These old types of splices used here were usually twisted, soldered, and taped with friction tape, but the box being on the floor may not meet the present requirements.

A floor box of the brass type, often used in the floors around malls and airports, are probably the best, but I see now that some people are stealing the brass for scrap!

Joe:
From the encapsulation.....maybe it's abandoned???

I've seem quite a few poke thru floor boxes with thermoplastic trim-outs lately. And, yes the big Dept Stores still use the brass ones. I had an inspection today (Macy's) with 24 poke thru's, and that's Phase 2 area.

John