ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Potseal 11
Recent Posts
Electrode boilers question
by annemarie1. 04/27/17 01:40 PM
Why cables look like they do
by LongRunner. 04/26/17 09:36 AM
Dimmable LED 2x4 lay in fixtures
by HotLine1. 04/24/17 05:43 PM
Old decora style outlets
by Lostazhell. 04/22/17 07:59 PM
Permit Snafus...AHJs and Contractors Jump in
by gfretwell. 04/22/17 01:11 PM
New in the Gallery:
SE cable question
Popular Topics(Views)
234,863 Are you busy
169,656 Re: Forum
162,898 Need opinion
Who's Online Now
0 registered members (), 46 guests, and 12 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#214252 - 11/03/14 11:59 PM Support of multigang boxes  
BigB  Offline
Joined: Mar 2004
Posts: 719
Tucson, AZ USA
We have been using a lot of the Arlington Industries "One" box, which is listed for both old & new work. The 4 gang ones do not have a bracket for additional support like most 4 gang boxes do. Our inspector's here will fail for no additional support on 4 gang and up, but I cannot find a code reference. I believe multi gang boxes manufactured with additional brackets are required to be secured with those brackets but I do not believe a listed box manufactured with no additional bracket is required to be supported at both ends, and to do so would violate 314.23(1). I think they have been enforcing the manufacturer's requirement to use the provided additional supports for so long it has grown into "all four gangs to be supported" in their minds. Am I correct or did I miss something in the NEC? (We do not have any local amendments so it can't
be that)

2017 / 2014 NEC & Related Books and Study Guides

#214254 - 11/04/14 02:19 AM Re: Support of multigang boxes [Re: BigB]  
Tesla  Offline
Joined: Jun 2004
Posts: 1,273
Sacramento, CA
Contact Arlington -- customer service -- to see if they've got UL/CSA literature that backs your contention.

Your best shot at winning the AHJ over comes from authority.

This is especially true when the issue turns on a specific product.

A four-gang box is pretty uncommon in residential. With any kind of wiring discretion, my impulse is to design away from such a box.

Obviously, any support scheme is sure to compromise Arlington's depth adjustment scheme.


#214255 - 11/04/14 02:40 AM Re: Support of multigang boxes [Re: BigB]  
gfretwell  Offline

Joined: Jul 2004
Posts: 9,069
I think the rub comes in the first line of 314.23(B)
"shall be rigidly and securely fastened in place."

If the far end is not secure and rigid, you need better bracing.

Greg Fretwell

#214264 - 11/04/14 09:45 PM Re: Support of multigang boxes [Re: BigB]  
HotLine1  Offline

Joined: Apr 2002
Posts: 6,809
Brick, NJ USA
I just looked around the Arlington site, and see no info.

I have to go with Greg....far end moves, it needs bracing.


#214269 - 11/04/14 11:23 PM Re: Support of multigang boxes [Re: BigB]  
BigB  Offline
Joined: Mar 2004
Posts: 719
Tucson, AZ USA
On there specifications page it says "super secure" and "no wobble". Since they are flat against the stud they do not move, and are rigid and secure. I would think this meets the requirements of 314.23(B). We emailed Arlington and are waiting for a reply. I guess I am having trouble understanding why a listed product cannot be installed per the instructions. It is still my belief that the inspectors have been seeing them with the extra brace for so long they assume that the extra brace is required.

[Linked Image]

Last edited by BigB; 11/04/14 11:25 PM.

#214272 - 11/05/14 04:08 PM Re: Support of multigang boxes [Re: BigB]  
HotLine1  Offline

Joined: Apr 2002
Posts: 6,809
Brick, NJ USA
I saw what you posted, but I don't see any reference to the 4 gang.

If you mount it and it's solid, I would have no issue.


Member Spotlight
Brick, NJ USA
Posts: 6,809
Joined: April 2002
Show All Member Profiles 

2017 NEC and Related
2017 NEC
Now Available!

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.019s Queries: 15 (0.004s) Memory: 0.7781 MB (Peak: 0.9269 MB) Zlib enabled. Server Time: 2017-04-28 10:17:56 UTC