[oil pan 4]

I had a GFI catch fire at work after getting wet.
You absolutely can not let water get on them. When energized they react as if made from metallic sodium when they get wet.
I don't care what NEC says, I am not putting them down low where they can get wet or any where outside. In cases like that use a GFI breaker in the breaker box.
Until recently I actually liked the concept of GFI receptacles or remote GFIs, because GFI breakers tend to nuisance trip a lot.
I will take the nuisance trip prone breakers now.
Any GFI receptacle should have a cover on it IMO.

Also at the scrap yard several months ago, I found 20+ perfectly good GFI receptacles and one completely burned up and melted one.
I couldn't understand why someone would rip out several hundred dollars worth of new, perfectly good GFI receptacles and toss them.
Now I see why.