220 volts is normally (around there) what you see everywhere in Europe.

However, from my point of view having been trained an electrician in the U.S. in California as a child to 17 and then also working with my father as an electrician at age 21 after college for awhile. My point of view is that 220 Volts people can easily die from.

Whereas 110 Volts (unless you are standing in water when you are hit with it) likely isn't going to kill you but it might hurt a lot. The only way it might kill you if it goes through your brain or directly into your heart somehow. But then again there are many fluke situations especially if you aren't an experienced electrician that likely has been shocked thousands of times by 110 or even 220 volts. However, by the time you get up to 440 or 480 volts it starts being very very unlikely you will survive this. Then if you are hit by 1000 volts it might make you jump across a 20 foot wide space or room and you likely have around 1 and 100 chance to survive 1000 volts. I know only 1 person who has survived a 1000 volt shock when they picked up a line down with 1000 volts outside their house. It shocked then about 20 feet away and then they collapsed unconscious for awhile. But, they survived this long term. Maybe a little like being struck by lightning possibly.

But, 220 like you see in Europe one can instantly die from if they get into it. However, European Electricians likely have developed ways to survive the 220 volts in various different ways. It's sort of like SCUBA diving to 300 feet (it can be done but it's very dangerous).

I was looking at the 1000 volt lines coming into my house from the power and phone lines on our telephone poles outside. The 1000 volt lines (if your electricity isn't underground instead) are those right on top of the poles. So, the very top lines are the 1000 volt lines. then these 1000 volts go into a transformer before it comes into your home. The Transformers bring the voltage down from 1000 volts to 220 Volts. Then you will see two black lines and one white line coming from the transformers to your home. Then in your main panel in your home if you take one black line and the white line you get 110 volts. If you you take both black lines and the white line you get 220 volts for an Electric clothes Dryer or Electric Stove or sometimes Hot Tubs.