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Antistatic Mat
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Please be positive and constructive with your questions and comments.

Antistatic Mat

by ljeung on Sun Jul 11, 2010 12:16 am

In the forum topic Re: cheap antistatic mat for workbench?? at viewtopic.php?f=8&t=15903, poster westfw suggested an aluminum cookie sheet as a cheap antistatic mat for a workbench. Would a rectangular sheet of any kind of metal work?

In any case, how should an antistatic mat be grounded? At the ESD Fundamentals page at http://www.esda.org/esd_fundamentals.html, the Electrostatic Discharge Association (ESDA) recommends connecting the mat to what they refer to as an equipment ground or the third wire (green) electrical ground connection, such as the center screw of a standard electrical outlet, via a grounding cord with a ring terminal. Can a 18-22 gauge wire be used as a cheap grounding cord? Should there be a resistor (1 MOhm) connected between the mat and the grounding cord? And if an outlet has more than one screw, such as an outlet with four or six sockets may have, can any of the screws serve as the grounding point?

Best regards,
L
ljeung
 
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Re: Antistatic Mat

by mikeselectricstuff on Sun Jul 11, 2010 4:17 am

A metal bench is a really bad idea. You're much more likely to kill something by shorting out on a metal surface than by ESD.
As long as the bench material isn't actively genenerating static (e.g. plastic) it is fine. Wood and kitchen worktop type materials are perfectly OK and don't need any additional antistatic measures.

IMO much of what the ESD 'industry' sells is unnecessary.
mikeselectricstuff
 
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Re: Antistatic Mat

by ljeung on Mon Jul 12, 2010 4:05 am

Thanks for your advice, mikeselectricstuff. I won't use metal.

L
ljeung
 
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Joined: Wed Jun 23, 2010 9:41 pm

Please be positive and constructive with your questions and comments.