Basics: there is always a potential difference between two objects.  Only 
exception : if they are galvanically connected to each other.

So, if one object is in a Farady cage, the pontential difference remains.

Dramatic example: 
http://www.youtube.com/watch?v=9tzga6qAaBA&feature=related

If one considers that we work with 1.5 volt gates today,  it's better to 
exaggerate the safety routines, than to let 'experienced' people have their 
own rules.

my two microvolts

Inge



--------------------------------------------------
From: "Graham Collins" <[log in to unmask]>
Sent: den 26 May 2010 18:30
To: <[log in to unmask]>
Subject: [TN] ESD spec question

> Hey TechNet
> It's been a quiet day on Technet!
>
> I've got a question regarding ESD.  I was taught that if I am not
> grounded I do not go near anything that is ESD .  The example we are
> debating here today concerns parts that are stored in metal cabinets.
> The cabinet is grounded, and within the cabinet drawers there are ESD
> sensitive parts in individual bins, not covered or packaged (no faraday
> cage).
>
> Is it OK to open the drawer and look into the cabinet without being
> properly grounded?  I say no, but am I being overly cautious?
>
> If "no" is the right answer, where would I find that in an ESD spec?
> I've given ESD-S20.20 a quick peruse, nothing jumped out at me.
>
> regards,
>
> Graham Collins
> Halifax Production Engineering
> (902) 873-2000 ext. 6215
>
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>
>
>
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