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I constantly getting shocks from electrostatic charge - what can i do ?

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Halcyon:
I find the same thing with my Ikea chair. If I get up off it, I can almost guarantee the next thing I touch will get a zap. On really dry days, it's enough to throw the sync of my monitor out for a few seconds.

Since the legs are metal and appear to be very well grounded, as I'm getting up, I make sure one foot touches the metal until I'm on my feet, so just about all static is dissipated. It hasn't failed me yet.

Berni:
I have a RH% of about 25 to 40 in winter and static is never really a issue. Its rare for me to get a shock of any kind, most of the static is from changing clothes where you can definitely feel it and hear it crackling.

Having a 1Meg vs 100K resistor to earth from the mat won't make much of a difference, you can still feel a shock trough 1M since that is about what my ESD mat at work has and i felt it before. But you probably feel it less with 1Meg.

I find it hard to believe that a ground fault would cause this. Don't think any of the mains powered devices would have enough isolation from the earth referenced L and N wires to actually cause a static shock. That fault causes a different kind of shock. Its devices leaking a tiny amount of current into the earth wire causing it to rise to 100V. The sensation of touching that depends on how much current is being leaked in. At very low currents you might notice a buzzing sensation when running your finger over metal surfaces, as if the surface was slightly bumpy. At slightly higher currents you might notice a uncomfortable pin prick like sensation when touching sharp corners of metal objects (this concentrates the current in a small enough area to be felt). If the current is even higher then it might start feeling like an actual electric shock. The sensation continues to happen even if you let go and touch it again a split second later. With enough earth leaky appliances on a faulty earth power strip can collect together enough leaking current for this shock to even be properly painful. These shocks are generally not dangerous as the currents are just so low. But do become a very dangerous situation when one of the appliances actually does go faulty and shorts between L and PE, effectively making touching metal cases the same as touching Live.

CDN_Torsten:
For target humidity, I would target 40% or higher.

Additionally, have a look at this list, and compare it to the materials in your workspace: http://tcdsbstaff.ednet.ns.ca/scroache/Sci%20Electricity/Materials%20that%20Cause%20Static%20Electricity.htm

kultakala:
My chair and desk may be isolated from ground but if i stand directly in front of the desk on the hard floor and touch nothing but the computer keyboard i get a spark... 
So material of the chair and other stuff are not playing any roll.

Guess its just to dry and the laminate floor may be isolating a bit too.

Just sprayed my socks with water so that they are slightly wet... no shocks or sparks.

When the air humidity is higher the problem will go away, but i look for a solution to prevent getting shocked or destroying my computer until then  ;)

rfclown:
I've worked a place were they put a coating on the floor for anti-static (and we were required to wear an anti-static coat and things over our shoes to enter the production area). Part of the solution could be an antistatic mat on the floor.

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