@pfriedma @f4grx @BalooUriza true, you can't use these in an outage. They don't oscillate themselves, need the grid to follow it (not an expert, @balkonsolar know the details probably). So for danger, the remaining thing is the shape of the plug, with the german "SchuKo" style hiding the pins until the connection is severed, which isn't quite so easy with these flat US-style sockets i guess... There's still discussion about "but what if i really quickly pull the plug out" though...