Yeah! 120v will feel like a tickle. I changed an outlet this week, and unless you're an idiot, it won't do much. But err on the side of caution. Don't stand in a puddle. 240v, on the other hand, can easily kill. In the 1970s, I owned a condo with electric baseboard heat. I swapped them out for fan-forced wall-mounted units. I once forgot to throw the circuit breaker and got knocked on my ass. Thankfully, the ground was broken when I fell. I'm sure my wife wouldn't have thrown the breaker, even if she knew what it was! GlennTrue. But still, you really don't want to mess around with 240v unless you know what you're doing. Our 120v system for the most part, will just give you an unpleasant sensation. 240v and it is game on. To create the microwave frequency for cooking, you need a lot of power. That's why microwave ovens have a nasty capacitor in them that will mess you up if you don't know what you're looking at. It's how they became countertop appliances without needing a 240v outlet. --120v with a nasty capacitor can do the trick.