Common Ground for two 200amp breaker panels?

Reply

  #1  
Old 03-11-07, 09:59 PM
Member
Thread Starter
Join Date: Mar 2007
Posts: 3
Question Common Ground for two 200amp breaker panels?

I currently have two separate 200 amp breaker panels feeding my home (400 amp total service). Each panel has a separate ground wire (~1/4" diameter) that runs to a water pipe ground, connected to the water pipe about 6 inches from the basement wall. Both grounds are attached to the same water piple.

The home builder just stapled the ground wires to the bottom of the floor joists in the basement, and I now want to rerun the grounds through the floor joists the same way the romex was run.

My question is, "Can both ground wires be run through a single hole in the floor joists (i.e. the gound wires will touch), or must they be kept separated until the point where they are attached to the water pipe ground?"

I realize tht this is probably a stupid question, but I would surely appreciate an answer.

Thanks ... Hooz
 
Sponsored Links
  #2  
Old 03-12-07, 03:14 AM
Member
Join Date: Apr 2006
Location: New Bern, NC
Posts: 1,623
you can put them in the same holes.
 
  #3  
Old 03-12-07, 07:42 AM
Forum Topic Moderator
Join Date: Feb 2005
Location: Near Lansing, Michigan
Posts: 10,337
Shut off your main breakers before you disconnect the ground wires. Those wires may be carrying enough current to be dangerous.
 
  #4  
Old 03-12-07, 07:47 AM
Member
Thread Starter
Join Date: Mar 2007
Posts: 3
Originally Posted by jwhite View Post
you can put them in the same holes.
Thanks. Looks like I'll be drilling fewer, albeit larger, holes.
 
  #5  
Old 03-12-07, 07:48 AM
Member
Thread Starter
Join Date: Mar 2007
Posts: 3
Originally Posted by ibpooks View Post
Shut off your main breakers before you disconnect the ground wires. Those wires may be carrying enough current to be dangerous.
I had planned to do that "just in case" ... thanks for confirming that this is a necessary step.
 
  #6  
Old 03-12-07, 06:22 PM
Member
Join Date: Mar 2005
Posts: 433
Isn't their purpose to create a path to ground in th event of electrified plumbing? That would mean the wires are harmless, but the pipes themselves are the culprits
 
  #7  
Old 03-12-07, 06:34 PM
Speedy Petey's Avatar
Banned. Rule And/Or Policy Violation
Join Date: Nov 2003
Posts: 2,455
No because they are grounding electrode conductors that also serve as the water pipe bond, not just water bonds.

There is always the potential for current on GEC's, albeit not much
 
  #8  
Old 03-12-07, 07:16 PM
Member
Join Date: Mar 2005
Posts: 433
Nobody ever said it extended 10 feet into the ground, or that it was used as one of the required forms of grounding, rather than just bonding it. right?
 
  #9  
Old 03-12-07, 07:25 PM
Member
Join Date: Sep 2000
Location: United States
Posts: 18,497
Let's not go crazy here with an unbounded discussion of bonding and grounding. The poster's question has been asked and answered.
 
  #10  
Old 03-12-07, 07:43 PM
Member
Join Date: Mar 2005
Posts: 433
Just trying to prove a point the poor fellow need not be scared _____ to touch a ground wire here and there.
 
  #11  
Old 03-13-07, 03:51 AM
Speedy Petey's Avatar
Banned. Rule And/Or Policy Violation
Join Date: Nov 2003
Posts: 2,455
If the connection is made within 6" of where a METALLIC water pipe enters a house, it is perfectly normal to assume this is a water pipe electrode. Or should we have to OP dig up his front yard to be sure.
 
Reply

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
Display Modes
'