I think the USA is the only country that has 120v system. When I was shocked in other countries using 220v system I could tell it was stronger, but I imagine it was still less then the use of a stun gun (which I have never felt). In other countries I am not sure what the amps are, nor did I bother to ask, but I can only assume that it was at a safe level.
Good comment though, incase someone has an idea with doing a 220 or 440v system here in the USA. I would never try to hook up something like that unless I know what I am doing (which I dont).
Dude, if you don't know what you're doing or talking about, don't talk about it and confuse others who are curious.
Don't worry about being electrocuted with 12v. Ever licked a 6v battery? That's about all your going to get. There's a reason they use 12v dc for these submersible pumps, it's safe.
Here's different explanation for electricity for others. Amps are like water in a pipe. They are what does the work, and what kills you. Voltage is like the pressure that determines how fast the water (amps) flows. The higher the pressure, the more water gets to the destination. Electrical devices can only use so much electricity at a given voltage (or pressure). If you give a device that needs .8A a "pipe" (or power supply) that can supply 1.5A of electricity, that pipe won't be full, only. 8A will flow.
I like the pizza analogy! Never heard that one before.
Just got my black pump, need to test it out this weekend!