You find yourself in an airport or hotel room in another country, and you really need to charge your phone, camera or game system. But what is that strange-looking outlet? It has round holes! And ...

The first U.S. detachable electric plug was patented by Harvey Hubbell II in 1904 and was among many of Hubbell's contributions to the field. But it would take a few decades before a standardized ...

Most electrical outlets are installed vertically, with one receptacle oriented above the other. But if you take a close look around your house, you'll probably find at least a couple mounted ...