Shelving ESD Requirement - Grounding wire

#1

Hi,
The shelving/rack we using in EPA are metal frame and direct contact to ESD floor.

Without grounding wire on this shelving, our compliance verification measurement on point-to-ground is still well within <1 x 10E9 ohm requirement.
Is it still a MUST for us to put grounding wire? as we think this is redundant.

Thanks,
KK

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#2

Hello,

The must is in the measurement. If you are measuring less that 1x10E9, then you are compliant with ANSI/ESD S20.20.

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#3

Thanks John, appreciate it. Your reply carry weight.