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#87089 - 01/20/04 05:29 PM grounding sub-panels  
slee  Offline
Junior Member
Joined: Jan 2004
Posts: 1
Need some guidance please. When installing an electrical distribution system, what is the requirement for grounding the sub-panels? Are we required to drive a ground rod for each sub-panel? I think not. I've always been taught/told to bond the sub-panels to the service entrance using a grounding conductor sized for the sub-panel's feeder circuit, and the service entrance is connected to the ground rod, but I can't find the reference in the 2002 NEC. Is there one?

Any help is appreciated.

thanx


2017 / 2014 NEC & Related Books and Study Guides

#87090 - 01/20/04 06:36 PM Re: grounding sub-panels  
rmiell  Offline
Member
Joined: Nov 2000
Posts: 242
La Junta, Co. USA
See Article 250 for all the rules for this type of grounding.

Rick Miell


#87091 - 01/21/04 12:31 AM Re: grounding sub-panels  
russ m  Offline
Member
Joined: Feb 2003
Posts: 169
Burbank,IL,USA
Is the sub panel in the same building?
Is it fed with a metalic conduit?

If yes, yes, your done.
If yes, no, Pull a equipment ground sized to 250.122, and do not bond the neutral to the ground in the sub panel.
Terminate the EGC to a lug or ground bar bonded to the panel



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