Sub Panel Help - Electrical - DIY Chatroom Home Improvement Forum

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


Thread Tools Display Modes
Old 04-08-2010, 02:18 AM   #1
Join Date: Mar 2010
Posts: 2
Rewards Points: 10

Sub panel help

Installing a 200amp all in one box outside , not much will be on this one, just a few circuits - 30 ft away I need a 125 amp sub panel 22 breakers 15 & 20 amp & 6 240v lines that are ALU old gray type wire & will have 30,40,amp breakers. Will power a 2 ton & a 3 ton air unit.
What wire size should I run 1/0 or #2 wire to the sub ??
2 hot -1 neutral, & what size for the ground ?
please explain about keeping the neutrals and ground buss separated, only in the sub panel?
Permits are in hand.

Thanks for the knowledge.


Last edited by shortsell; 04-08-2010 at 09:30 AM.
shortsell is offline   Reply With Quote
Old 04-08-2010, 05:18 AM   #2
Tool Geek
PaliBob's Avatar
Join Date: Jun 2008
Location: Pacific Palisades CA
Posts: 2,590
Rewards Points: 2,160

First step is to get a permit. Requirements may vary a little but your Safety and Liability are on the line.


& Stay Safe
.....Bob Lavery
PaliBob is offline   Reply With Quote
Old 04-08-2010, 07:52 AM   #3
Licensed electrician
Join Date: Sep 2007
Location: Maryland
Posts: 10,236
Rewards Points: 626

Have you done a load calculation to see what size feeder you need to the subpanel? The 125 amps is just the max that can feed that panel.

Also refer to this sticky post.

Stubbies Diagrams and other stuff
Answers based on the National Electrical Code. Local amendments may apply. Check with your local building officials.
Jim Port is offline   Reply With Quote

Thread Tools
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
Multiple Panel Question theatretch85 Electrical 7 09-29-2016 07:15 PM
100 -> 200 amp panel upgrade questions philipjcaputo Electrical 1 10-30-2009 03:35 AM
Replacing 2 Sub Panels with 1 Larger Panel GuitarJack Electrical 7 08-25-2009 08:43 PM
Replacement Meter Panel leonard_voet Electrical 19 04-09-2008 10:27 AM
Installing new (service?) breaker panel and generator panel Nhrafan Electrical 6 04-01-2008 03:03 PM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1