[forgettableuser]

I knew a guy in college who rented a house that didn't have any outlets with a ground plug.

This became such a problem, he made his own ground by using a big metal pipe outside the house that was already deep in the earth, and running a wire from it to where he kept all his equipment.

Then he used stuff like in that picture to make sure he could ground all his equipment.

[josefdlange]

This is the right way to use those! It's so rare to hear of proper usage.

[hexane360]

You can also screw them to the outlet box, which should already be grounded, especially if it uses older BX sheathing.