Contact US

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!

*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

grounding grid observation profile in CDEGS

grounding grid observation profile in CDEGS

grounding grid observation profile in CDEGS


IEEE std 80-2013 mentioned grounding grid is normally set 3-4 feet extension out of the station fence boundary. And in CDEGS, the observation profile is set at another 3 feet extension out of the grounding grid boundary.

My question is if there is any colorful spots shown on the outer 3 feet area, which means in grounding grid area, including inner fence are ALL clear without any touch potential issue, and we are sure there is no equipment or building or structure there, could we simply ignore those colorful spots in grounding study?

grid is attached, and the pink stuff is fence.

Thank you

RE: grounding grid observation profile in CDEGS

You are understanding IEEE 80 correctly, if there is nothing to touch there is not a touch hazard (even if software indicates the potential is there). You can ignore the colorful spot, but I want to highlight common oversights-
-- Is there surfacing (rock) considered in the compliance criteria (if yes does it go out to 3-4 feet)?
-- Are there any outward swinging gates that may extend the reach from ~3 feet to 10 foot gate + 3 foot reach (13 foot total in this example)

RE: grounding grid observation profile in CDEGS

You can set the profile to only run the simulation in the bounds of your grid, then you won't see any of the issues outside.

RE: grounding grid observation profile in CDEGS

Thank you, DBL-E, and Yes, there is crushed rock covers beyond 3 feet of grid.

So it is OK to not observe this extra 3 feet of crushed rock area?

The project is in Canada, so CSA C22.1 36-304 also applies here, which asks to have 1 meter extend out of grid. So I am just wondering if the profile in CDEGS has to observe this extra 1 meter out of grid? now it seems we can just run the simulation in the boundary of the grid, then we won't see any of the issues outside---it compliances with both IEEE 80 and CSA C22.1, right?

RE: grounding grid observation profile in CDEGS

Thank you, huskyeng, yes, so only observe the grid area, not see any of the issues outside---does it compliance with both IEEE 80 and CSA C22.1 36-304?

RE: grounding grid observation profile in CDEGS

If step-voltage can be a problem (usually not), you should consider 1 meter outside the grid. This is where the step-voltage is greatest.

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! Already a Member? Login


Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close