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grounding sub-panels #87089 01/20/04 05:29 PM
Joined: Jan 2004
Posts: 1
S
slee Offline OP
Junior Member
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
Re: grounding sub-panels #87090 01/20/04 06:36 PM
Joined: Nov 2000
Posts: 246
R
rmiell Offline
Member
See Article 250 for all the rules for this type of grounding.

Rick Miell

Re: grounding sub-panels #87091 01/21/04 12:31 AM
Joined: Feb 2003
Posts: 169
R
russ m Offline
Member
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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