in certain environments, particularly where a plug could be pulled or partially dislodged.
Imagine a device with a heavy plug or cord connected to the receptacle.
If the grounding opening is at the top and a metal object were to fall against a partially inserted plug, the configuration may reduce the chance of creating a dangerous electrical path in some circumstances.
More commonly, however, an unusual orientation can serve as a visual signal.
Upside-Down Outlets Can Be Used as a Visual Indicator
In some buildings, receptacle orientation is used to
