ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Potseal 11
Recent Posts
600 KW 120/208 3 Phase Y protection
by Yooperup. 07/24/17 12:20 PM
1913 American Electrician's Handbook
by gfretwell. 07/20/17 01:08 PM
Green House wiring
by ghost307. 07/20/17 09:10 AM
Permit Snafus...AHJs and Contractors Jump in
by HotLine1. 07/18/17 08:06 PM
New in the Gallery:
SE cable question
Popular Topics(Views)
239,347 Are you busy
174,811 Re: Forum
167,192 Need opinion
Who's Online Now
0 registered members (), 53 guests, and 5 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
Page 1 of 2 1 2
#38624 - 05/28/04 02:10 AM Gangables, bigger and better available?  
srscott  Offline
Joined: May 2004
Posts: 15
Crystal Lake, IL
We do alot of remodeling; cutting-in fan boxes, switches, outlets, etc, etc, etc. We use (nominally 2X3 inch) gangables (and please, what I'm using for a nomenclature is
probably different on every street let alone each town and state), with ears, typically 3 1/2 deep for wire fill. My question is this; does anyone make a gangable that can actually fit a fan control, dimmer or GFI into it after its already been reduced in size due to the (again this will be my street word) madison clip? A few years back for reasons unbeknownst to us electricians our supply house started supplying only Steel City boxes. Raco seems to have same size. Anything better out there that help?

Work Gear for Electricians and the Trades

#38625 - 05/28/04 08:49 AM Re: Gangables, bigger and better available?  
iwire  Offline
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
The horizontal distance between the 6-32 screw holes for mounting the device is a standard.

No matter who makes the ganged or gang able box the same measurement has to be met.

If they did not follow the standard the device plates would not fit on.

Some speed controls and some dimmers really do not do well and may be required to be derated when ganged in one box.

If you have to break off the removable heat sinks on the sides to fit them in a ganged box you must not use them at the full value.


[This message has been edited by iwire (edited 05-28-2004).]

Bob Badger
Construction & Maintenance Electrician

#38626 - 05/28/04 11:15 AM Re: Gangables, bigger and better available?  
Dave55  Offline
Joined: May 2004
Posts: 697
Crystal Lake, Illinois, USA
I do a lot of remodeling also and unforunately it's the nature of the beast.

My best relief has been using stranded wire, especially for GFCIs with 12 ga wire. The increased flexibility of the wire makes it much easier to install the devices. Also, if you're installing two devices, sometimes you can use a 4"x4" box with a mud-ring. This gives many options for depth that will give PLENTY of space. The boxes (without brackets) can be mounted beside a stud with wood screws through the box. If you gang a 4x4 with a 4x4 extension and a 1/2" ring (total of 3.5" deep) you'll be in space heaven!

With a little luck and care a double cover will just cover the hole. I usually warn the homeowner that some paint touch-ups may be needed (I even patch the ring). Hope this helps.


#38627 - 05/28/04 01:15 PM Re: Gangables, bigger and better available?  
hbiss  Offline
Joined: Dec 2003
Posts: 886
Hawthorne, NY USA
By madison clips I am assuming you are referring to the sheet metal supports that are shaped like an "F" (sometimes called "steam boats"). You put the box in the hole and slide two of these along side each side of the box then fold over the tabs into the box with your linesmans. You can get them really tight and against the insides of the box so they take up no room.

If you are talking about those expansion screw clips that you clip on the side of the box and then tighten the screw to draw it tight, well yes they are a problem when used with devices that need the entire width of a box. Somebody used to make a jem box (that's what we call them) with these built in and they didn't intrude on the inside dimensions. I haven't seen them in years though. Might check the catalogs.


#38628 - 05/28/04 04:27 PM Re: Gangables, bigger and better available?  
Electricmanscott  Offline
Joined: Jan 2002
Posts: 1,457
Holden, MA USA
What about plastic boxes. Much more room than a metal box and usually faster to install.

#38629 - 05/31/04 12:28 AM Re: Gangables, bigger and better available?  
DougW  Offline
Joined: Jun 2003
Posts: 1,143
North Chicago, IL
Assuming your AHJ allows plastic boxes. Several towns around here would red-tag you if they saw 'em.

#38630 - 05/31/04 06:16 AM Re: Gangables, bigger and better available?  
iwire  Offline
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
Doug, Chicago?

Those of us under the NEC can not be red tagged for plastic boxes, barring local amendments.

Scott, plastic or metal if it is a multi gang box the distance between devices is the same.

I do agree for a single gang box the plastics provide more space.


Bob Badger
Construction & Maintenance Electrician

#38631 - 05/31/04 08:21 AM Re: Gangables, bigger and better available?  
electure  Offline

Joined: Dec 2000
Posts: 4,260
Fullerton, CA USA
One benefit to the plastic boxes is that the cable comes in at the extreme rear of the box. With metal boxes, the KO is further forwards.

Trying to put a spring-wound timer, or some dimmers into a "Gem box" (as we call them) or a "cut-in" box is nearly impossible. The device fills the box so completely that there's no room for the connector...S

#38632 - 05/31/04 06:07 PM Re: Gangables, bigger and better available?  
Obsaleet  Offline
Joined: Apr 2003
Posts: 362

Choose your customers, don't let them choose you.

#38633 - 06/01/04 11:44 AM Re: Gangables, bigger and better available?  
srscott  Offline
Joined: May 2004
Posts: 15
Crystal Lake, IL
Thanks to all for your postings to date, we had a fun weekend keeping the rain out of our basement [Linked Image]
No, in most places we work we can't use anything other than conduit and obviously metal boxes. We take other measures to avoid having to situate larger devices in our boxes such as loading it from another GFI, etc. When we start a project it's usually with the understanding that we'll TRY not to damage existing walls and such, but it happens. I'll try some suggestions given and maybe report back with progress in a few months.
This sure does make me think twice about putting anything but a 4X4 box in anywhere when the walls are open to us... for the next guy. Thanks for imput, Scott.

Page 1 of 2 1 2

Member Spotlight
West Virginia
Posts: 2,236
Joined: November 2000
Show All Member Profiles 

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman


Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.018s Queries: 15 (0.003s) Memory: 0.8196 MB (Peak: 0.9938 MB) Zlib enabled. Server Time: 2017-07-26 12:33:56 UTC