Bringing lazy to a whole new level
-
This is a metal conduit wiring method, where the metal pipe carries the ground for you.  Easy peasy!  **But this person was so lazy they couldn’t even be bothered bringing a neutral wire**. 

Not bootlegging ground, bootlegging neutral. 
-
They just left off the neutral wire. Neutral is jumped to ground to steal neutral from the grounded pipe.  

Now, I work enough with EMT to know the pipe *does* separate from time to time.  Under this disastrous miswiring, ***when this happens it will energize the pipe with 120V along with all equipment chassis***, junction box, cover plate screw, etc.

Just throw a neutral wire in the pipe
-
All you need to do is throw a neutral wire in the pipe.  And remove that jumper.  

And you'll probably need to do this on every recep, lamp, disposal, and every other 120V load on the premises.