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My Case Gives Me An Electric Shock?! - Page 2

post #11 of 36
The PSU is BAD, it is dumping AC to ground (the case). This is not right....Grounding wires are for emergencies. If you ground the entire case, you are only asking for disaster. Replace the PSU. Also check the power cable to make sure it's not shorting.
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post #12 of 36
Wait... My comp was doing the same thing but anything plugged into any outlet with bare metal on it i could get a shock. Even my monitor screen..(Btw at the time I was on a bare concrete floor (basement))
    
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post #13 of 36
They do not have grounds in europe it seems.
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post #14 of 36
It may not be the PSU afterall, if what you describe about the concrete basement floor is true. `Sounds like ground stake going to your breaker box is not working for some reason. Turn off your main breaker to your house and use a megger to check from the ground strip in your breaker box to the ground stake in the ground (if you can find it). In many cases this stake is in the ground near the power pole in which the transformer supplying your electric meter is located. The ground wire from the meter to the ground stake may be bad or have a bad connection. Check with the electric company about this (I would check with them anyway).
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post #15 of 36
Quote:
Originally Posted by hvacgaspiping
It may not be the PSU afterall, if what you describe about the concrete basement floor is true. `Sounds like ground stake going to your breaker box is not working for some reason. Turn off your main breaker to your house and use a megger to check from the ground strip in your breaker box to the ground stake in the ground (if you can find it). In many cases this stake is in the ground near the power pole in which the transformer supplying your electric meter is located. The ground wire from the meter to the ground stake may be bad or have a bad connection. Check with the electric company about this (I would check with them anyway).

LOL! Good point.
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post #16 of 36
This woudnt be the case if they dont have grounded plugs though would it?
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post #17 of 36
Quote:
Originally Posted by Double Helix
This woudnt be the case if they dont have grounded plugs though would it?
Right...there would be no return path if there was no ground plug on the PC. AC has it's own dedicated loop. It only touches ground to isolate noise and dump current in the even of spikes, etc. Which brings around the point that the PSU must have an internal short to the PSU case.
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post #18 of 36
Heh, yeah since in europe you run 240/480 volt systems there is no neutral ...but also losing the ground to the grounding grid of your home basically makes anything with current in it use you as the quickest route to ground since it has no where else to go....

Also US national electric code requires all homes to have 2 8' ground rods (galvanized or copper clad) driven 6' apart from each other along with a cold water bond if you do not have PVC plumbing. As for 2 wire 120v systems they went out in the 70's with the introduction of the GFCI (Ground Fault Circuit Interrupter). Basically kills the circuit within milliseconds of a direct ground fault between hot to ground or neutral to ground. Most commonly found in the bathrooms and kitchens and for outside receptacles of home below 6'. A new addition to this that will save alot PC users from ground fault issues in new homes is the AFCI (Arc Fault Circuit Interrupter) which is now required in every bedroom of a new home. I know I don't know everything about electricity but after 13yrs in the trade I've seen quite a bit and seen alot of changes to how we do things. I also don't know what powers that govern the codes of european countries but I'm sure things are very different with the different voltages you use. That said the basic principles of electricity still apply, you grab a wire that's hot or under load and it is gonna use YOU as its quickest route to the earth lol

BTW it hurts like HE double hockey sticks!!!!!! I get nailed on average of about 3 times a week lol Slippery fingers lol Also couldn't even give you an estimate of how many tools I have practiced AC arc welding with

Shaggyt
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post #19 of 36
Quote:
Originally Posted by ShaggyTed
Heh, yeah since in europe you run 240/480 volt systems there is no neutral ...but also losing the ground to the grounding grid of your home basically makes anything with current in it use you as the quickest route to ground since it has no where else to go....

Also US national electric code requires all homes to have 2 8' ground rods (galvanized or copper clad) driven 6' apart from each other along with a cold water bond if you do not have PVC plumbing. As for 2 wire 120v systems they went out in the 70's with the introduction of the GFCI (Ground Fault Circuit Interrupter). Basically kills the circuit within milliseconds of a direct ground fault between hot to ground or neutral to ground. Most commonly found in the bathrooms and kitchens and for outside receptacles of home below 6'. A new addition to this that will save alot PC users from ground fault issues in new homes is the AFCI (Arc Fault Circuit Interrupter) which is now required in every bedroom of a new home. I know I don't know everything about electricity but after 13yrs in the trade I've seen quite a bit and seen alot of changes to how we do things. I also don't know what powers that govern the codes of european countries but I'm sure things are very different with the different voltages you use. That said the basic principles of electricity still apply, you grab a wire that's hot or under load and it is gonna use YOU as its quickest route to the earth lol

BTW it hurts like HE double hockey sticks!!!!!! I get nailed on average of about 3 times a week lol Slippery fingers lol Also couldn't even give you an estimate of how many tools I have practiced AC arc welding with

Shaggyt
Sorry...are you telling me Europe uses GROUND as the return path for standard AC????
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post #20 of 36
I get the same thing happening to my case.

Look... I live in the UK and it works like this.

230v (used to be 240v) @ 50Hz A/C is supplied to my house, through a live wire. The current returns to the power station through a neutral wire. A ground wire which goes from electricity box (on side of house) to the earth is also present.

All plugs are 3 pin. The one on the right (if looking with cover of plug removed) is live, the one on the left is neutral, and the one at the top is earth.

Having the current return through the ground is impossible, because it leads to the earth.

The ground wire is there to protect the user. The ground wire takes current if the appliance is faulty to the earth, instead of through the person, so you don't get killed. This only happens if part of the circuit in the appliance touches something metal, which is then touched by the person. It prevents you from being dead if there is a fault.

Appliances which are double insulated (no exposed metal parts) do not not need an earth wire, but a 3 pin plug is still used (it just isn't connected on the inside).
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