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#154609 - 09/29/06 05:46 PM ISOLATED GROUND
doninphx Offline
Junior Member

Registered: 09/29/06
Posts: 5
Loc: phoenix , az USA
COULD SOME ONE GIVE ME A GOOD DISCRIPTION OF AN ISOLATED GROUND..

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2014 / 2011 NEC & Related Books and Study Guides
#154610 - 09/29/06 05:54 PM Re: ISOLATED GROUND
renosteinke Offline
Cat Servant
Member

Registered: 01/22/05
Posts: 5305
Loc: Blue Collar Country
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.

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#154611 - 10/01/06 08:58 AM Re: ISOLATED GROUND
gfretwell Offline

Member

Registered: 07/20/04
Posts: 9045
Loc: Estero,Fl,usa
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

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#154612 - 10/01/06 10:09 AM Re: ISOLATED GROUND
Roger Offline
Member

Registered: 05/18/02
Posts: 1779
Loc: N.C.
Here is a graphic from Ed MacLaren



Roger

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#154613 - 10/01/06 10:18 AM Re: ISOLATED GROUND
Roger Offline
Member

Registered: 05/18/02
Posts: 1779
Loc: N.C.
This thread has been relocated to the "NEC & other Code issues" forum, please continue the discussion HERE

Thanks

Roger

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