>From my experience, one does not require a grounding resistor on table mats
/ floor mats. In fact, I've connected them directly into earth ground.

According to EIA-625, Figure 1 (page 8), the resistors for the static
dissipative work surfaces (R2) and the ESD protective floor mats (R3) are
optional. If you are using R2 and R3, the values should be specified by the
ESD equipment manufacturer. I don't think there are any special requirements
(wattage, material of construction, etc.) for this resistor.

Lee Whiteman
Senior Manufacturing Engineer
ACI / EMPF
Telephone: (610) 362-1200; Ext. 208
FAX: (610) 362-1290
E-Mail: [log in to unmask]


-----Original Message-----
From:   TechNet [mailto:[log in to unmask]] On Behalf Of Ashok Dhawan
Sent:   Tuesday, May 23, 2000 6:51 PM
To:     [log in to unmask]
Subject:        [TN] Question on EIA-625 : Technical specs of Grounding resistor

 << File: adhawan.vcf >> For grounding Table Mats/ Floor Mats and
workstations, does grounding
resistor need special
                   characteristics e.g. Wattage, material of
construction, etc.
                   We intend to use 1M Ohms resistor. EIA-625 does refer
to EOS/ESD-S6.1 standard (
                   paragraph 7) for grounding details, if anyone has
that details on that.

                   Thanks in advance for advice.

                   Ashok

--

Ashok Dhawan P.Eng
Engineering
C-Mac Electronic Systems Inc.
1455 Mountain Avenue
Winnipeg, Manitoba R2X 2Y9
Canada
Phone: (204) 631-7208
Fax: (204) 631-7294
E-mail: [log in to unmask]
www.cmac.ca

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