×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Clean (electronoc) earth and plant earth bonding

Clean (electronoc) earth and plant earth bonding

Clean (electronoc) earth and plant earth bonding

(OP)
Request to get info on Standards / best practice on bonding of Clean earth grid and Plant safety earth grid. If both need to be bonded, type of bonding and preferred loacation of bonding?  Your valuable input will be appreciated

Ramesh

RE: Clean (electronoc) earth and plant earth bonding

See IEEE Std. 1100.

What is a clean earth? Uses cleaner dirt? Are electrons in electronic circuit different than in power circuit?

Rafiq Bulsara
http://www.srengineersct.com

RE: Clean (electronoc) earth and plant earth bonding

There's only one earth, and you're standing on it!

RE: Clean (electronoc) earth and plant earth bonding

The "clean" or "quiet" grounding concept has been largely discredited for the past twenty years or so.

Standards will depend on where you are at, which you don't bother to tell us.  

Safety codes generally require that all grounding system be bonded together.   

David Castor
www.cvoes.com

RE: Clean (electronoc) earth and plant earth bonding

(OP)
Thanks David for your input. We are following IEC standard and there is a discussion on the grounding arrangement as our Instrumentation group requesting for separate grounding arrangement for their panels and not to connect it to general protective grounding grid.

Regards
Ramesh

RE: Clean (electronoc) earth and plant earth bonding

Ramesh

They can't have that. Their panels are no different than other's and shall be connected to PE. Cable shields may have their own 'quiet' ground aka TE or some variation thereof.TE is always connected to PE. Usually in a star or tree fashion.

Or do they want to handle their I/O separately? I guess they are free to do whatever they want with them. Usually, a 4-20 mA loop isn't grounded anywhere.

Gunnar Englund
www.gke.org
--------------------------------------
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources