Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Electrical

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 05-27-2010, 08:58 PM   #1
Member
 
Join Date: Jun 2007
Location: Milwaukee, WI
Posts: 61
Share |
Default

More than just a ? on grounding size for sub panel.


Hi guys,
I've read through a bunch of posts and found a lot of good info, but I didn't see this answered directly.
I'm running a 40amp sub panel in my attached garage using #6 in conduit. I'm not going all the way back to the main panel with it though. About 3/4th of the way across the basement I'm tying into an abandoned electric range feed, which is a 6/3 NM w/ground (all copper). I threw up a Milbank and brought in my #6's and the 6/3, and tied them in with a Polaris block.
My question is what size wire do I need to bring back from the sub panel to where I'm tying in with the 6/3? One of the electricians on a job I'm at said I should run #8 for the ground. Does it need to be that big? I've got the #8 so it's no big deal, but what if I ran the 6/3 w/ground all the way between each panel? The solid wire ground in that NM looks pretty small. Could I run the same size solid ground?
More of a theoretical question I suppose.
Thanks for any info.
Eric

52Caddy is offline   Reply With Quote
Old 05-27-2010, 09:05 PM   #2
Master Electrician
 
Join Date: Mar 2010
Location: Indiana
Posts: 2,865
Default

More than just a ? on grounding size for sub panel.


6-3 wg NM contains a #10 equipment ground. There is no reason to use a larger size given the the 40 amp circuit breaker.
Don't forget to bond the j-box if it is metallic.

brric is online now   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
need to know what size sub panel to get italy92530 Electrical 23 01-15-2010 09:56 PM
grounding of main panel and sub panel in older house linkysys Electrical 2 10-01-2009 04:34 PM
Cable Size for Sub Panel vs chart jamiedolan Electrical 5 11-09-2008 01:30 PM
Wire size for Sub panel DaleB Electrical 13 09-18-2008 12:28 AM
Detached Garage Sub Panel Grounding Q integlikewhoa Electrical 13 01-01-2008 06:22 AM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.