I feel like a dumb American every time someone refers to it as "mains power" or a "mains cable". I have to google to figure out what the heck they're talking about. Thankfully Wikipedia tells me I'm not wrong, it is called something different in the US. 
And those wacky Canadians call it something even different!
http://en.wikipedia.org/wiki/Mains_electricity
Yeh, We Canadians call it "Magic Juice", eh :-)
