Ground Rod


Old 10-11-13, 09:37 AM
Thread Starter
Join Date: Aug 2012
Posts: 11
Received 0 Votes on 0 Posts
Ground Rod

So, i've completed an installation of a 100 amp subpanel in a detatached garage.. and i'm trying to sort out the ground rods... My question is how many do i need? I can not seem to locate the requirement for the number of rods in the 2011 NEC? 1 or 2? or the wire size...
Sponsored Links
Old 10-11-13, 09:43 AM
CasualJoe's Avatar
Join Date: Jan 2010
Location: United States
Posts: 10,693
Received 91 Votes on 81 Posts
I'd just use one with #6 copper wire, I prefer bare 7 strand.
Old 10-15-13, 04:03 PM
Nashkat1's Avatar
Join Date: Mar 2012
Location: USA
Posts: 8,469
Received 2 Votes on 2 Posts
The number of ground rods needed is not specified in the code, only the requirement for a low-impedance path to ground. The means needed to meet that requirement is a local decision based on the conductivity of the soils in your area.

Ask your inspector.
Old 10-15-13, 05:57 PM
pcboss's Avatar
Forum Topic Moderator
Join Date: Jul 2002
Location: Maryland
Posts: 15,173
Received 91 Votes on 78 Posts
Unless you can prove less than 25 ohms resistance on one rod you will need another one. If using a Ufer ground, you do not need any rods.
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: