Question
 | | | | | 
Jul 18, 2008, 01:23 PM
| | New Member  | | Join Date: Jul 2008
Posts: 3
| | | 100 amp sub in garage
I am wanting to put a 100 amp sub panel in a garage, I want to run it from the main in the house (which is 200 amp) about 80 to 85 feet away there is only 20 amp running to the garage now with no junction box or sub panel, what size wire do i need also, the garage is covered in metal siding do i need to do anything special with the siding
| | | | | | |
Answers
| | | | | |
Jul 18, 2008, 03:13 PM
|
#2
| | | Electrical & Lighting Expert
Join Date: Feb 2008
Posts: 1,019
| Most areas would allow the use of #4cu or #2al for a 100a sub-feed.
If they do not, use either of those sizes and just use a 90a breaker.
The siding does not have to be bonded, but it is not a bad idea.
Is the framing metal? That would have to be bonded. |
 | | | | | | | | | | | | |
Jul 18, 2008, 03:20 PM
|
#3
| | | Electrical & Lighting Expert
Join Date: Jun 2007
Posts: 645
| The NEC requires structural metal to be bonded, if likely to become energized, but no mention of metal siding. Yet, it doesn't hurt to check with the authority having jurisdiction. I know my inspector wanted me to bond the metal siding on a garage we wired. Yet, the NE code does not call for this.
-Are you planning to run your conductors underground?
-Copper or Alum? | |
| | | | | | | | | | | | |
Jul 18, 2008, 03:21 PM
|
#4
| | | Electrical & Lighting Expert
Join Date: Jun 2007
Posts: 645
| I guess I took waay to long to type....................  | |
| | | | | | | | | | | | |
Jul 18, 2008, 03:37 PM
|
#5
| | Electrical & Lighting Expert
Join Date: Feb 2008
Posts: 1,019
| Man, it took you seven minutes to type that?   | |
| | | | | | | | | | | | |
Jul 18, 2008, 03:42 PM
|
#6
| | Electrical & Lighting Expert
Join Date: Jun 2007
Posts: 645
| Quote: | Originally Posted by stanfortyman Man, it took you seven minutes to type that? |
- 1 min to type
- 1 min to get my code book
- 4 minutes to find the code refer
- 30 secs to let my dog out
- 30 secs to get back to my computer | |
| | | | | | | | | | | | |
Jul 18, 2008, 05:57 PM
|
#7
| | Electrical & Lighting Expert
Join Date: Feb 2008
Posts: 1,019
| I bet there was a pee break in there somewhere too. Quote: | Originally Posted by Washington1
- 4 minutes to find the code refer |
If we ever meet I'll have to bring you an NEC on CD.
Best thing since the cordless drill!  | |
| | | | | | | | | | | | |
Jul 18, 2008, 06:00 PM
|
#8
| | Electrical & Lighting Expert
Join Date: Jun 2007
Posts: 645
| Quote: | Originally Posted by stanfortyman I bet there was a pee break in there somewhere too.
If we ever meet I'll have to bring you an NEC on CD.
Best thing since the cordless drill! |
I have it!  | |
| | | | | | | | | | | | |
Jul 19, 2008, 08:55 AM
|
#9
| | New Member
Join Date: Jul 2008
Posts: 3
| Quote: | Originally Posted by stanfortyman Most areas would allow the use of #4cu or #2al for a 100a sub-feed.
If they do not, use either of those sizes and just use a 90a breaker.
The siding does not have to be bonded, but it is not a bad idea.
Is the framing metal? That would have to be bonded. |
Thanks for the response, It is just metal siding. on an old two story barn, I am wanting to have a wood shop upstairs on the second story, would it be even better to have a regular main instead of a subpanel | |
| | | | | | | | | | | | |
Jul 19, 2008, 02:32 PM
|
#10
| | Electrical & Lighting Expert
Join Date: Feb 2008
Posts: 1,019
| Quote: | Originally Posted by jacksota would it be even better to have a regular main instead of a subpanel | Please explain what you mean by this.
Do you mean a dedicated service to the barn?
Just so you know, a detached structure fed from another building does require a main disconnect. | |
| | | | | | | | Question Tools | Search this Question | | | | | Display Modes |  Linear Mode | |
