trancemanDon't mean to sound like an ass, but I can't believe someone would seriously ask that question. How do you go about not knowing the nominal voltage of your country's power supply? Asking as a fellow American here.
doubletakeBecause it's something you never have to think about. Only when dealing with products sold internationally have I ever had to know the voltage of a US outlet.
MrBeanBut surely it must have been taught in elementary school physics class? You basically can't avoid bringing it up while studying about electricity and doing basic theoretical and practical experiments. Or from a life time of plugging things in and out of sockets.
LuoboI bet you don’t know the precise width of a standard wooden pencil either, even though you’ve stuck them in a pencil sharpener many times. The whole point of a standard is that you don’t need to think or worry about things fitting together; if they’re both made to spec, they’ll just work.
And most of my elementary school experiments were done with batteries, not power outlets.
MrBeanI just want to make it clear I'm not having a go at anyone here, I just find it hard to believe how you can not even pick it up by accident. Learning about electricity, voltage, amperes, etc is elementary school stuff. As a home owner you must know what a fuse is and how it works.
As for you comparison, we mostly use mechanical pencils, and from an early age you learn they come in different thicknesses, like 0.5 or 0.7, because it says so on the side, just like many power cables has text on the side, or on top of chargers/transformers, or on the very equipment you use. It's not uncommon to even see a little switch allowing you to go from 110 to 220.