I believe you that accidents don't happen often with them. But, on the other hand, you're describing a scenario where you: - Melted the enclosure, probably ex

I believe you that accidents don't happen often with them. But, on the other hand, you're describing a scenario where you: - Melted the enclosure, probably exposing the wiring, maybe near your hand if you reached up to see what was happening - While you might have been standing on a drain that was an excellent path to ground And, if the ground wire is meant to be constantly in contact with the water, there's certainly cheap ways to ensure that, that are better than "exposed stripped end randomly sits in the chamber".