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)
234,828 Are you busy
169,604 Re: Forum
162,853 Need opinion
Who's Online Now
0 registered members (), 54 guests, and 9 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#67078 - 06/25/06 09:06 PM outlet boxes in basements with furring strips  
nov  Offline
Joined: Aug 2004
Posts: 69
New Jersey
How do you fellas go about installing outlets in a basement wall. The set up is furring strips nailed to the cinder block then paneling or sheetrock installed. There is only a 3/4" space between the rock and block. I have seen those arlington boxes that go into the void in cinder block but I am worried about a hole that large in the block because of water. The sheetrock is not bad it would be an 1 1/4" box but the paneling is only 1/8" thick.

Work Gear for Electricians and the Trades

#67079 - 06/25/06 09:31 PM Re: outlet boxes in basements with furring strips  
gfretwell  Offline

Joined: Jul 2004
Posts: 9,069
Cutting into the block with a side grinder is the easiest way. You can also fish that wire through the block into a deep box and avoid that "physical damage" problem. Water shouldn't be an issue since block is not waterproof but thermal insulation/draft stopping may be an issue. The mounting pad usually has a 1/2" offset but if you shim it to the block with 3/8 ply instead of nailing to the furring it works out right for 1/8 panelling.

Greg Fretwell

#67080 - 06/26/06 01:22 PM Re: outlet boxes in basements with furring strips  
TNSunny  Offline
Joined: Dec 2005
Posts: 44
I generally just run conduit down the wall and mount the boxes on the surface. It really doesn't look all that bad, and sure beats the heck out of trying to cut cinder block 3/4"-1" behind the surface of the wall and through an opening the size of a single-gang box. And once you factor in the time it takes to fish wire through the block - IF the block isnt' filled with concrete - installing the conduit is much more cost effective.



#67081 - 06/26/06 02:52 PM Re: outlet boxes in basements with furring strips  
Elviscat  Offline
Joined: Aug 2005
Posts: 214
Seattle Washington USA
You might be able to install shallow Wiremold boxes, I believe they're 15/16" so you might be able to have them install the paneling over the boxes with only a slight bulge... Just a suggestion

#67082 - 06/26/06 03:01 PM Re: outlet boxes in basements with furring strips  
iwire  Offline
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
We usually blow out the block with a demo hammer making room for a 4" sq box and plaster ring.

I don't think wire mold boxes are listed for flush installation.

Bob Badger
Construction & Maintenance Electrician

#67083 - 06/26/06 04:06 PM Re: outlet boxes in basements with furring strips  
Roger  Offline
Joined: May 2002
Posts: 1,716
We do the same as Bob does and if the blocks are hollow we just use a hammer.

We use one of the boxes below or one simlar.

[Linked Image]

[Linked Image]

If the furring strip doesn't work out with a web we just add a short piece where we want it.


#67084 - 06/26/06 09:30 PM Re: outlet boxes in basements with furring strips  
renosteinke  Offline
Cat Servant
Joined: Jan 2005
Posts: 5,316
Blue Collar Country
My first suggestion is to lay the panelling over a layer of sheetrock. The panelling, in my experience, simply is not stiff enough to support itself- unless you're putting the firring 6" apart! Nobody likes the wavy look of unsupported panelling.
(If you plan on a layer of foam insulation, the sheetrock is a MUST for fire protection. Foam burns like rocket fuel).

It is possible to use MC- it's skinnnier than pipe- but you still will have the connector running into the sheetrock, and some trimming will be needed. And then there is the issue of "mud ring" sizes.

Sure there are real shallow "cut in" boxes out there, but they will neither solve the connector problem, nor have room for more than three wires.

Wood isn't that pricey .... why not use thicker firring? A 2x2 will give you an entire 1 1/2" to work with.

Member Spotlight
Amish Country, PA
Posts: 46
Joined: March 2013
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: 0.014s Queries: 14 (0.003s) Memory: 0.7861 MB (Peak: 0.9382 MB) Zlib enabled. Server Time: 2017-04-27 20:48:24 UTC