ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat Box
Recent Posts
Lock-down Thread
by HotLine1 - 04/19/21 02:39 PM
Where is Everyone?
by gfretwell - 04/17/21 07:32 PM
Upside Down ThreeWay
by Trumpy - 04/17/21 06:25 AM
Thought this was funny
by Trumpy - 04/17/21 06:22 AM
How's all our Non-US folks doing?
by Trumpy - 04/17/21 05:37 AM
New in the Gallery:
Facebook follies, bad wiring
FPE in Germany pt.2
Who's Online Now
0 registered members (), 15 guests, and 14 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Support of multigang boxes #214252 11/03/14 11:59 PM
Joined: Mar 2004
Posts: 782
BigB Offline OP
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
Re: Support of multigang boxes [Re: BigB] #214254 11/04/14 02:19 AM
Joined: Jun 2004
Posts: 1,273
Tesla Offline
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.

Re: Support of multigang boxes [Re: BigB] #214255 11/04/14 02:40 AM
Joined: Jul 2004
Posts: 9,577
gfretwell Offline
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
Re: Support of multigang boxes [Re: BigB] #214264 11/04/14 09:45 PM
Joined: Apr 2002
Posts: 7,238
HotLine1 Online Content
I just looked around the Arlington site, and see no info.

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

Re: Support of multigang boxes [Re: BigB] #214269 11/04/14 11:23 PM
Joined: Mar 2004
Posts: 782
BigB Offline OP
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 from]

Last edited by BigB; 11/04/14 11:25 PM.
Re: Support of multigang boxes [Re: BigB] #214272 11/05/14 04:08 PM
Joined: Apr 2002
Posts: 7,238
HotLine1 Online Content
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.



2020 National Electrical Code
2020 National Electrical
Code (NEC)

* * * * * * *

2020 Master Electrician Exam Preparation Combos
2020 NEC Electrician
Exam Prep Combos:
Master / Journeyman


Member Spotlight
Posts: 74
Joined: June 2012
Show All Member Profiles 
Top Posters(30 Days)
Trumpy 11
BigB 1
Popular Topics(Views)
277,947 Are you busy
211,408 Re: Forum
198,463 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.3