Grounding electronic equipment - IEC Std.

[JuanBC]

Question:

On a LV TN-S ground grid system... should I link a "dedicated electronic ground" with the "general ground grid" of the installation?

Why/why not?

Thanks!

JBC
.......
"The more I read, the more I acquire, the more certain I am that I know nothing"

 

[Skogsgurra]

Main thing is that you bond the "Signal Ground" to the "Quiet Ground", which is supposed to be the PE. N carries lots of dirt and should not be used. Some system builders used to have a separate non-polluted ground, the TE. But I don't see that often today.

In case of a ground fault, you may have ugly voltages everywhere. So OVP is recommended.

Some system builders tried to have their entire Control system floating. But that was usually not possible to maintain many days before there was a Connection somewhere. Bonding ecerything together is, in my view, the best thing to do. Not so sure what IEC says about it. I "inputted" some views on this when the "Potential Equilization (Bonding) Handbook" (only in Swedish) was compiled some twenty years ago. Things may have changed.

Gunnar Englund

http://www.gke.org

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Half full - Half empty? I don't mind. It's what in it that counts.

 

[7anoter4]

A Telecommunications Earthing System shall be provided and a busbar dedicated shall be mounted close to telecommunication devices. The busbar shall be isolated from its mounting point (a 50 mm separation is recommended) and a bonding connection made to the room’s power service earth and the closest accessible building steel.
See-for instance:

http://www.commscope.com/docs/uniprise_futp_grounding_guidelines.pdf

 

[waross]

a bonding connection made to the room’s power service earth

This is an Electrical Code Requirement in Canada.

Bill
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"Why not the best?"
Jimmy Carter