Electrical Safety Matting Floor Electrical Outlet Safety And Could It Be Replaced With Flush Mount Outlet?

Floor electrical outlet safety and could it be replaced with flush mount outlet? - electrical safety matting

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Plant output and electrical safety
I have an outlet in my studio floor. It was in the concrete slab where the house was built 25 years installed. I think: "I can smell burning, at times, but my husband never. Are they safe? Can change the performance can, and if so, are there on the floor rather than a" slap "? I have a blanket over him - Is it safe ? Thanks!