Why Some Wall Outlets Are Installed Upside Down

isn’t a universal rule, though.

One electrician

might use orientation as a visual identifier while another might use colored receptacles, labels, or no special indication at all.

So if you see one upside-down outlet in an otherwise uniform room, don’t automatically assume it has a special electrical function.

1. The Outlet May Be Controlled by a Wall Switch
  In some homes, one half of a receptacle is controlled by a wall switch.

This arrangement is especially common in rooms where a ceiling light wasn’t originally installed.

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