I do a lot of home inspector follow ups for realtors, so I see a lot of crazy stuff. Today was no exception as when I went to pull the bathroom GFCI to correct a reverse polarity I found the whole bathroom was wired with an old extension cord. At least they used a 3 wire 16 guage, the flat yellow kind. Maybe they thought the yellow made it 12 guage like the new romex. They tapped the bathroom behind it for power and ran to the GFCI, light over mirror, and fan.