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What does grounding an electrical plug actually do (and why do we ignore it)?
Asked by ben (9080)
December 17th, 2009
Take a look at Apple laptop plugs: The two different ends plug into the exact same adapter, but one has three prongs and one has two. And anyone can buy those two-to-three converters that seemingly unground the third prong.
What’s going on here? How does it work, and why is it both important enough to be kept as a standard, yet no one ever thinks twice about ignoring it?
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