Some of these plugs feature more substantial differences than others, such as the Type A and B plugs only rated to 120 volts, whereas most other plugs reach 220 to 240 volts. What the prongs do ...

I've just purchased a used HP 33U server rack to use in my house for A/V and other equipment but it currently has a built-in power strip (and fans) that plug into a 220 volt outlet. The guy I ...