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#23565 - 03/20/03 07:27 PM School Work
sparky*62 Offline

Registered: 07/27/02
Posts: 20
Loc: Ca.
I was asked to do some work for a school and I noticed 9" christy box's with lids marked ground near the back. Is there a code for a dedicated ground rod for each modules subpanel?

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#23566 - 03/20/03 10:51 PM Re: School Work
Trumpy Offline


Registered: 07/05/02
Posts: 8532
Loc: SI,New Zealand
What is a Christy box?, let alone a 9" one.
Let's face it, these days if you're not young, you're old - Red Green grin

#23567 - 03/21/03 12:15 AM Re: School Work
Scott35 Offline

Broom Pusher and

Registered: 10/19/00
Posts: 2724
Loc: Anaheim, CA. USA
Sounds like you are describing "Hand-Holes" for access / verification of the Clamps and GEC at the rod(s).
Is this correct???

Seen a couple places which had redundant ground rods for supplimental electrodes, and they were driven outside of the gear room (and ended up in the finished sidewalk - resulting in round "Hand-Holes").

These had covers with the phrase:

"Ground Rod", "Grounding Electrode" (or something similar) imbossed on them.

Scott " 35 " Thompson
Just Say NO To Green Eggs And Ham!

#23568 - 03/21/03 01:04 AM Re: School Work
joeh20 Offline

Registered: 03/21/02
Posts: 95
Loc: Tullahoma, TN, 37388
Here you go Trumpy

[This message has been edited by joeh20 (edited 03-21-2003).]
Lighting the way

#23569 - 03/21/03 08:04 AM Re: School Work
caselec Offline

Registered: 04/14/02
Posts: 557
Loc: San Jose, CA

When you say modules are you referring to modular (portable) classrooms? If so then a grounding electrode system is required for each module since each module is considered a separate building. See 250.32

Curt Swartz


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