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by timmp, September 10
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by timmp, September 10
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#154609 09/29/06 08:46 PM
Joined: Sep 2006
Posts: 6
D
Junior Member
COULD SOME ONE GIVE ME A GOOD DISCRIPTION OF AN ISOLATED GROUND..

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#154610 09/29/06 08:54 PM
Joined: Jan 2005
Posts: 5,476
Likes: 3
Cat Servant
Member
An "isolated ground" is one where the groundING conductor is separated / insulated from the raceway, and does not contact other groundING conductors prior to arriving at the panel.

#154611 10/01/06 11:58 AM
Joined: Jul 2004
Posts: 10,009
Likes: 37
G
Member
In the computer biz they specify that the IG conductors will originate at the ground busbar where the Grounding Electrode Conductor lands in the service disconnect enclosure and that it radiates to the equipment in a tree fashion from there with no parallel paths. It will be isolated in any intervening distribution panels. Since we never brought the neutral to the computer panels they would use the insulated neutral busbar for the IG. Green reidentification of all of the conductors made it apparent this was a grounding bus. Sometimes they were also labelled that way.
Usually we also had a bare wire ground bonding conductor to the enclosures too.


Greg Fretwell
#154612 10/01/06 01:09 PM
Joined: May 2002
Posts: 1,716
R
Member
Here is a graphic from Ed MacLaren

[Linked Image]

Roger

#154613 10/01/06 01:18 PM
Joined: May 2002
Posts: 1,716
R
Member
This thread has been relocated to the "NEC & other Code issues" forum, please continue the discussion HERE

Thanks

Roger


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