ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Trumpy 5
Recent Posts
What do you do?
by ghost307. 09/22/17 08:26 AM
Another generator question
by gfretwell. 09/21/17 02:41 PM
Supporting conduit bodies
by ghost307. 09/18/17 12:12 PM
Thermal Imaging Camera upgrade
by Potseal. 09/18/17 11:57 AM
Linear Power Supply Quits Under Load
by JoeTestingEngr. 09/15/17 11:37 PM
New in the Gallery:
Gallery Test
Popular Topics(Views)
240,860 Are you busy
176,619 Re: Forum
168,533 Need opinion
Who's Online Now
0 registered members (), 38 guests, and 9 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#7026 - 01/18/02 07:27 PM box extenders  
Matt M  Offline
Member
Joined: Mar 2001
Posts: 93
Laporte, MN, USA
What is your opinion of box extenders like the one pictured on this link? When a wall or ceiling is sheeted over, do these devices satisfy the requirements of article 314.20? I've always thought no. If the box is mounted in noncombustible material, and is less than 1/4" back-set, they wouldn't be necessary at all, and if the box is mounted in combustible material it must be mounted flush. If the box is set back more than 1/4" in noncombustible material, or less than flush with combustibles, I've always assumed that the box needed to be moved out. I realize that in most cases the AHJ would probably allow this, but is it technically a valid fix? Article 314.20 has no exceptions.

Matt

box extender


Work Gear for Electricians and the Trades

#7027 - 01/18/02 09:13 PM Re: box extenders  
rkukl  Offline
Member
Joined: Oct 2001
Posts: 41
Turners Falls,MA. USA
I have used this type of extender and they work pretty well. I think that they are allowed and are one of the few ways out of the issue of having a box set too far back. When I first started the only extenders were sheet metal, they also worked well the biggest problem I had with those is that the metal ended up very close to the energized screws so I always taped the device. You are correct the best solution is to have properly installed boxes but I for one don’t live in a perfect world.


#7028 - 01/18/02 09:43 PM Re: box extenders  
Nick  Offline
Member
Joined: Aug 2001
Posts: 599
Riverside, CA
[Linked Image]

If you notice from the page they are CSA certified but not UL listed. Some AHJ’s would reject them based on this. I have had inspectors accept them in non-rated walls but not firewalls. What that decision was based on I am not sure. A call or e-mail to Arlington’s tech support could answer all your questions. If you do, and get an answer, be sure to post back here so we can all learn the outcome.



Member Spotlight
Bill Addiss
Bill Addiss
NY, USA
Posts: 3,878
Joined: October 2000
Show All Member Profiles 
Featured:

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: 0.013s Queries: 14 (0.003s) Memory: 0.7515 MB (Peak: 0.8736 MB) Zlib enabled. Server Time: 2017-09-22 15:22:58 UTC