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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!

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Joe Tedesco, NEC Consultant