Anybody noticed the hot wall plug?
You should check out a run-of-the-mill vacuum or electric mower.. plugs can get a bit warm, nothing wrong with that. Plus I'm not sure that's the plug rather than the meter on there. And, of course, there's no scale 
Yes, I know that, but you're right, there's no scale :p I'd wonder if it is hotter than a vacuum cleaner, as I myself, never run it more than 30 min.
But I had a soldering machine and I've melted some plugs back then!