That is why i always use a wrist strap and wear cotton clothing when working on hardware.
Do i need an antistatic mat to build a pc.
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The wrist strap is not necessary as long as you and the computer are grounded to a common point.
Instead of using a wrist strap connect the chassis to earth ground roll up your sleeves to maintain contact with the chassis exposed metal.
It is best to have it plugged up and unplug the power connector off the motherboard.
Since carbon is conductive if the mat is laid on top of conducting tables and floors static will travel through the mat into the table and dissipate at the floor into the ground.
Electrical outlets are normally the best ground for a mat in any building.
Just take the other necessary precautions.
Do i really need an anti static work mat.
Make sure you have one hand or your forearm touching some metal part of the case while working.
However typically you will want to connect an anti static mat for pc building to an electrical outlet.
Just plug the pc in an outlet and connect the wrist strap to the pc case.
You do not need an anti static mat or wrist strap.