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Windows 7: Electric current felt over PC case - Need help

30 Aug 2012   #1

Windows 7
 
 
Electric current felt over PC case - Need help

I moved recently to a new place, and hooked up my desktop PC. However, for some reason, there now seems to be a faint electric current running over my PC case. If I press my finger against the metal case, I can feel a tingling sensation which becomes painful if I hold my finger against it for too long. I've never had this problem before.

I tried Googling my problem, and only found this thread: [Solved] Electric current felt all over the case - Power-Supplies-PC-Cases-Case-Mods - CPU-Components
I seem to be having the same problem as him. I also have the same case (Cooler Master nVidia edition chassis).

Does this have something to do with my case not being properly "grounded"? I'd like someone to explain what that means, and how I can fix this. Thanks.

My System SpecsSystem Spec
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30 Aug 2012   #2

Microsoft Community Contributor Award Recipient

Microsoft Windows 7 Home Premium 64-bits 7601 Multiprocessor Free Service Pack 1
 
 

Are power plug and power outlet both grounded?! Also extension cord if attached?
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30 Aug 2012   #3

Windows 7
 
 

Quote   Quote: Originally Posted by Kaktussoft View Post
Are power plug and power outlet both grounded?! Also extension cord if attached?
What does that mean? I'm not using an extension cord, it's plugged directly into the wall. The plug looks like this: European Power Cord, Europe Power Cords, Cables, DF03
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30 Aug 2012   #4

Windows 8.1 Pro RTM x64
 
 

Do you only get this when your PC is running? Do you still get it if your PC is merely plugged into the mains, but without the socket being switched on? Do you get the same effect from any other appliances that you can try in the same socket (e.g. a toaster or kettle)?
My System SpecsSystem Spec
30 Aug 2012   #5

Windows 7
 
 

Quote   Quote: Originally Posted by Dwarf View Post
Do you only get this when your PC is running? Do you still get it if your PC is merely plugged into the mains, but without the socket being switched on? Do you get the same effect from any other appliances that you can try in the same socket (e.g. a toaster or kettle)?
The same electric current happens whether the PC is running or turned off, as long as it's plugged into the socket.
No, there is no current if it's plugged in with the socket switch off.
I tried connecting a TV to the socket, and it ran normally (I tried feeling the metal connectors on the back of the TV, no current).
My System SpecsSystem Spec
30 Aug 2012   #6

Microsoft Community Contributor Award Recipient

Microsoft Windows 7 Home Premium 64-bits 7601 Multiprocessor Free Service Pack 1
 
 

Something is leaking current to computer case and case isn't grounded!
My System SpecsSystem Spec
30 Aug 2012   #7

Windows 7
 
 

Quote   Quote: Originally Posted by Kaktussoft View Post
Something is leaking current to computer case and case isn't grounded!
Ok, but what does that mean? How do I "ground" the case? And how do I find out what is leaking?
My System SpecsSystem Spec
30 Aug 2012   #8

Microsoft Community Contributor Award Recipient

Windows 7 64 Bit Home Premium SP1
 
 

In the picture of the electrical plug you can see 2 prongs and then a hole. That hole should be a third prong - which is the ground line. Does your plug have a ground prong? Does the wall outlet?
My System SpecsSystem Spec
30 Aug 2012   #9

Microsoft Community Contributor Award Recipient

Windows 7 64 Bit Home Premium SP1
 
 

In a normal PC setup all of the grounding goes to and through the power supply. The power supply is then connected to the building's ground wiring through the ground plug in the wall socket.

Some cases add a separate ground wire (Antec is one) to ground the case. Usually from the front panel connections to the normal grounding path. This separate ground is forward thinking to avoid any static electric charge from running through the motherboard.

If you have this separate case ground wire, but the power supply does not have a path (through the power cord) to the building ground, then the power supply could be grounding to the case, explaining the charge you can feel.

That said it is still not normal for a constant electric charge to be running to ground. This usually indicates a short circuit in a DC system or an "open neutral" in an AC system.
My System SpecsSystem Spec
30 Aug 2012   #10

Windows 7
 
 

Quote   Quote: Originally Posted by TVeblen View Post
In the picture of the electrical plug you can see 2 prongs and then a hole. That hole should be a third prong - which is the ground line. Does your plug have a ground prong? Does the wall outlet?
This is what the cable is connected to at the wall socket: Laptop Supermarket - Brighton Euro to uk plug / power adapter Computer accessories, peripherals, lowest prices
This is what the wall socket looks like: wall outlet socket , Manufacturers from Casenl Electrical Co., Ltd.
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 Electric current felt over PC case - Need help




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