Is it okay to run PSU outside of computer with case open?

Dunlop0078

Titan
Ambassador
My PSU is not going to fit in my slim body dell so I'm wondering if it's okay to run the PSU outside of the computer with the case open I'll be sure to be careful and not drop anything in it. But will it still be grounded and safe to use? Any advice is appreciated.
 
Solution
It will be safe itself.
However its not recommended.
You will have wires exposed (still sleeved) but they will be open to the outside.