Panel Placement In Outbuilding - Electrical - DIY Chatroom Home Improvement Forum


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

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

Reply
 
Thread Tools Display Modes
Old 03-27-2008, 04:54 PM   #1
Newbie
 
Join Date: Mar 2008
Posts: 10
Rewards Points: 10
Default

Panel Placement In Outbuilding


OK, I've searched all the "garage subpanel" threads I could find, guess I have another to add to the fray:

What (if any) NEC requirements govern subpanel placement within a detached structure? My chief concern is proximity to the garage doors Ė the best location for a panel in my garage (from a ďmost direct feederĒ standpoint) is on a side wall about four feet back from the (vehicular) garage door to the right of the panel, and about two feet away from a window on the left. The back wall of the garage would be the most protected area, but putting the panel there would double or triple the length of all my wire runs (including the feeder and some heavy wire for a welder outlet), and would be very inconvenient from an access standpoint. Is there an issue with placing a panel so close to such a large exterior door? If so, is there any way to mitigate the problem? Also, to minimize the panelís intrusion into the garage space, I had planned on mounting it in a stud bay (the walls are all open), right up against one stud so that the knockout plugs on the other three sides of the box remain accessible. The panel is only serving four circuits so Iím not worried about crowding dozens of cables together on the same side of the box, but I do want to be sure that this isnít somehow prohibited (Iíve seen residential installations where the box was fully recessed into a finished wall, but I'm unsure if I can "classify" this installation the same way).

Also, a more general workmanship question - is it permissible to splice branch wiring inside a service panel? The same conduit that brings the feeder to the subpanel will also bring three #14 THHN wires in from the house for three-way control of the exterior lighting; I'd like to simply bring the 14/3 Romex used for the rest of the circuit right into the panel and splice the travelers together therein. I've read that making splices inside a panel is discouraged because it contributes to crowding, but I should have plenty of space in this install, so I think it's a non-issue, so long as it isn't actually prohibited. If it is, can I at least get away with using the panel as a "pass-through" for the two travelers into another junction box? My planned entry point is close to some diagonal bracing on the wall, and it would be awkward to fit a junction box in to split off the switch wiring before entering the panel.

Advertisement

smitty286 is offline   Reply With Quote
Old 03-27-2008, 09:54 PM   #2
Licensed Electrician
 
jrclen's Avatar
 
Join Date: Feb 2008
Location: central wisconsin
Posts: 982
Rewards Points: 500
Default

Panel Placement In Outbuilding


I see no problem with your panel placement. It is inside the garage, under the roof. Flush mounting the panel in a stud space is also not a problem. I have installed many panels in garages in the space next to the overhead door. There is no prohibition in the NEC concerning splicing those three conductors inside the panel. Be sure to check any local or state codes.

Advertisement

jrclen is offline   Reply With Quote
Old 03-27-2008, 11:17 PM   #3
Union Electrician
 
goose134's Avatar
 
Join Date: Nov 2007
Location: Chicago, USA
Posts: 615
Rewards Points: 500
Default

Panel Placement In Outbuilding


I agree with jr. If the panel or it's feeders are not exposed to vehicular damage, you should be fine. As far as splicing in the panel, NEC allows it but like a outlet box, it has to maintain a fill ratio. With the amount of wires you have coming in, you're nowhere near.
goose134 is offline   Reply With Quote
Old 03-31-2008, 01:20 PM   #4
Newbie
 
Join Date: Mar 2008
Posts: 10
Rewards Points: 10
Default

Panel Placement In Outbuilding


Excellent. Thanks for taking the time to reply, guys.
smitty286 is offline   Reply With Quote
Reply


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
This doesnt seem right. JoulesWinfield Electrical 27 07-26-2009 08:40 PM
turn main panel into a sub panel? tikicarver Electrical 2 01-24-2008 08:37 AM
Multiple Sub Panel Installation Handyman2007 Electrical 26 12-31-2007 06:47 PM
Splice in Neutral to Panel - OK or Not? allpraisebob Electrical 4 08-12-2006 06:54 AM




Top of Page | View New Posts