You might be surprised to find out how much current a wire can safely carry if it's just lying on the ground instead of burried in a wall... I Know I was
There are 3 ratings for any given size/type of wire.. Free air, In a wall/Conduit, and coiled.
A wire that overheats at 5 amps coiled, can easily carry 20 in a wall and much more in free air.
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