Question gets shocked by pc case

[emalcer 17]

i was busy with my pc and touched a medal rod and got shocked i tried it again and saw it was the pc case what do you do

 

[AllanGH]

What do I do?

I drag-out the digital meter and find out why my PC case is improperly grounded/Earthed.

 

[emalcer 17]

thank you but i dont have a electricity meter is there a way i can test it anathor way

 

[AllanGH]

You are firmly in the territory of "the right tool for the job".

If you don't have a multimeter, find somebody who does (and knows how to use it in the context of electrical trade work), and verify that you have a correctly wired outlet--complete with a low impedance ground/Earth wire.

Additionally, the PSU should be tested for a low-ish impedance path from the hi-potential side to ground/Earth. (I won't get into real-world "Y" cap failures because people seem to lose their ish over the difference between the way things are "supposed to fail" and the way things "actually do fail" in an applied context.)

If bad goes to worse, you may need to replace the PSU.

 

[TJ Hooker]

If you touch it twice back to back to you get shocked both times? If you hold your finger against the case do you feel a 'buzzing' or similar?

It is possible to get shocks from your case even if it's grounded properly. But as said above I'd check to see if you have grounded outlets.

 

[Karadjgne]

Psu supplies power to the motherboard and everything else. All of that is grounded to the frame by the 9 (ish) motherboard standoff screws. The frame is attached to the psu by the 3-4 screws in the back. The psu itself is grounded to its own case, which is then attached by those 4 screws to the frame. The psu ground originates at the plug from the wall.

So the only real potential failure points for ground are the wall socket itself, many older electrical systems didn't use a ground, just a 2 prong, hot/neutral setup. The cord, if the ground pin is broken, or the wire inside the cord is broken, no ground. The physical connection from plug to case inside the psu.

The chances of failure (usually due to excessive paint) from 13 different screws all simultaneously not supplying a decent ground are remote at best.

The only other option, it's not a grounding issue, but a you problem. If you contain excessive amounts of static electricity and touch a grounded appliance, you become a grounding path, and get shocked.