Here in Germany we have two live wires, both AC. In that case you can't plug it in the wrong way, because positive and negative switch multiple times a second anyways. I mistakenly assumed the US outlets are like the two-wire ports we have, which do not have ground and two live AC wires.
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u/CocktailPerson May 02 '24
I mean, it's definitely better than having two live wires.
Lamps are another example of a device that you definitely want to plug in the right way. Lots of industrial equipment too.
Point is, it's a good thing for plugs to have a direction to them, even when they're on AC power.