That would fall under the more than one connection exception. He went from working on house wiring to industrial wiring to working as an electrician at a power plant where they think of 4180 VAC as "low voltage" (that still requires Arc Protective gear to make or break connections). I think he has a pretty solid grasp of what to do and what not to do.
When we had to re-wire code put in breakers like that of some sort. Sneezing near an outlet would trip them. Never mind trying to trying to run a vacuum cleaner from an outlet in the Hallway. That just wasn't going to happen, the breaker would trip every single time and in the process it shut off my WtW access. Sitting out in the storage container they no longer trip at all. I'm OK with new features that make something safer, but when those features interfere with or restrict the normal usage then I'm no longer OK with them and they're gone. The sensor that stops the table saw blade before it can draw blood is awesome, but the guard that would bind up and destroy the work piece on any cut more than a 45° must have gotten lost somewhere......
