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Question Improving performance of dissipative carpet, minimum resistance to ground for minimal human perception of ESD shock on table mat-is 10 Meg sufficient? - Anonymous, Dallas, TX
Answer 10 megohm for a table mat is sufficient (actually anything over 1 megohm and less than 1 gigohm) if each contact point is no less then 1 megohm, i.e., no metal to conductive contacts (touching) points. Refer to ANSI/ESD S20.20: An electric Shock is kept to perception only (not surprise, Reflex action, etc as listed in DOD-HDBK-263, Section, Table VIII, (Ref.: MIL-STD-454), if the current value is less than 1 mA.
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