and electrical professionals who prefer the grounding opening to be positioned at the top.
One reason sometimes given is the potential safety benefit involving a partially inserted plug and a falling metal object.
The argument is that the grounding contact being above the energized contacts may reduce the likelihood of certain accidental contact scenarios.
However, this is not a universal rule, and receptacle orientation requirements and accepted practices can vary by jurisdiction and installation.
That’s why you may find perfectly legitimate installations using either orientation.
What If My Outlet Is Upside Down?
If the receptacle is working normally and there are no signs of damage, the fact that it’s upside down isn’t necessarily a reason to panic.
You don’t need to immediately turn off your entire house because one outlet has the ground opening on top.
Instead, look at the bigger picture.
Does the outlet feel loose?
Is there discoloration?
