What It Really Means When an Outlet Is Installed “Upside Down” (Ground-Up vs. Ground-Down)

The image shows two ordinary duplex electrical outlets side by side. On the right, the familiar arrangement: the round grounding hole sits at the bottom, with the two flat slots above it. On the left, the same outlet is rotated 180 degrees—the grounding hole is at the top, and the flat slots are below. Many people see the left outlet and assume something is wrong, that it was installed “upside down,” or that it signals a special type of wiring, a code violation, or a hidden safety feature. The truth is more interesting and more reassuring: the left outlet is usually described as being installed ground-up or