upside down isn’t automatically wired incorrectly.
And that’s where things
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get interesting.
What Does the Third Hole Actually Do?
That little rounded opening isn’t decorative.
It’s the equipment grounding contact.
A grounded receptacle provides a connection to the equipment grounding conductor, which is an important part of the electrical safety system.
The grounding path can help carry fault current away from exposed metal parts of equipment and back through the electrical system, helping protective devices
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