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 01-26-2009, 03:14 PM   #1
Newbie
 
Join Date: Jan 2009
Posts: 2
Rewards Points: 10
Default

Wire size for 100 amp basement sub-panel


Have a 200 amp main in my attached garage. I am adding a 100 amp sub-panel in my basement to run all my basement circuits (2 bedrooms, office, living room, wet bar, bathroom).

I have a panel with breaker set in the basement, and already have the 100 amp breaker to go in the main in the garage, but need to buy the wire to run in between.

I'm planning to call the inspector and just ask him, but looking for any other information first. I'm running it inside a wall, and through an attic space above my garage and back to my panel, so I'm not using conduit.

Is #4 for the hots and neutral enough? Or do I need to use #2? I think I can get a bundle with #4 hots and neutral at Home Depot, but not the bundle with #2 in it.

Ideas?

Thanks,

jbrown77 is offline   Reply With Quote
Old 01-26-2009, 03:55 PM   #2
elect, contractor
 
Join Date: Nov 2008
Location: niagara ontario
Posts: 44
Rewards Points: 25
Default

Wire size for 100 amp basement sub-panel


actually you could use a #3 / 3conductor romex (copper) a little price per foot, but the easiest /quickest to install

ACB Electric is offline   Reply With Quote
Old 02-17-2009, 10:38 AM   #3
Newbie
 
Join Date: Jan 2009
Posts: 2
Rewards Points: 10
Default

Wire size for 100 amp basement sub-panel


Well, my inspector told me I could run #3 copper or #1 alumimum SER. The suppliers that I contacted here in Minneapolis basically said they only carry the aluminum in a bundle 'cuz that's what everyone buys. So that's what I did. I've got the panel hooked up and am now running my circuits back to it. A lot nicer than running out to the garage to test them all the time!
jbrown77 is offline   Reply With Quote
Old 02-17-2009, 11:44 AM   #4
UAW SKILLED TRADES
 
Stubbie's Avatar
 
Join Date: Jan 2007
Location: Kansas
Posts: 5,039
Rewards Points: 2,048
Default

Wire size for 100 amp basement sub-panel


You used the correct cable by choosing SER and the inspector would be correct on the wire size assuming your not on 2008 code however if he told you that it was OK I wouldn't sweat it. You are likely 2005 or earlier code cycle.

You need 4 wires in your cable...2 Hots , a neutral and a ground. A main breaker in the sub panel is fine but was not required... just an FYI. You need to keep neutrals (whites) and all grounds separate in the sub-panel. I'll put up a diagram showing you how it should look. You will not install the main bonding jumper in the sub-panel could be a green screw or some other means. You may have to install a ground bar kit to accomplish the separation of the two.

If you can give us the make and model of your sub-panel we can tell you how to do this most likely.

Any questions get back to us.
Attached Thumbnails
Wire size for 100 amp basement sub-panel-4-wire-feeder-same-building.jpg  
__________________
" One nice thing about the NEC articles ... you have lots of choices"

Stubbie
Stubbie is offline   Reply With Quote
Old 10-25-2009, 09:58 AM   #5
Newbie
 
Join Date: Oct 2009
Posts: 1
Rewards Points: 10
Default

Wire size for 100 amp basement sub-panel


In other words, the sub panel box is grounded through the main panel, just like anything connected to the subpanel?

Regards
--schremmer
Campagne is offline   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
Wire size for sub-panel deepstuff Electrical 12 11-22-2008 12:08 PM
wire size suggestions dkennedy Electrical 17 10-19-2008 04:09 PM
wire size greywolf6 Electrical 8 07-14-2008 09:08 PM
Basement Renovation Project Howdy Electrical 6 03-13-2008 11:07 AM
Basement receptacle under service panel mekanic Electrical 2 05-12-2006 05:41 AM




Top of Page | View New Posts

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