The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Featured:

2017 NEC and Related
2017 NEC
Now Available!

Recent Posts
Members: Non-Members: Did you know?
by Admin
Today at 02:34 PM
Safety at heights?
by HotLine1
Yesterday at 08:51 PM
International Wire Colour Codes
by Texas_Ranger
Yesterday at 03:29 PM
Looking for older post
by Texas_Ranger
Yesterday at 03:22 PM
Last time to chat here
by Trumpy
01/20/17 11:41 PM
New in the Gallery:
Desk-mounted "power-board"
Shout Box

Top Posters (30 Days)
Admin 36
HotLine1 20
Ruben Rocha 17
gfretwell 16
Trumpy 15
Who's Online
1 registered (Admin), 83 Guests and 10 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#79702 - 01/13/02 05:13 AM 314.22
sparky Offline
Member
Registered: 10/18/00
Posts: 5545
Pg 44 of the nov NECA guide's 314.22 states the 'significance' of the 02' change as...

Installing surface-mounted boxes over existing flush boxes, to make aditions to electrical systems is no longer permitted.
This revision permits surface extensions to be made only from flush-mounted boxes with extension rings.

HUH? What?!


314.22 Exposed Surface Extensions.
Surface extensions from a flush-mounted box shall be made by mounting and mechanically securing an extension ring over the flush box. Equipment grounding and bonding shall be in accordance with Article 250.
Exception: A surface extension shall be permitted to be made from the cover of a flush-mounted box where the cover is designed so it is unlikely to fall off or be removed if its securing means becomes loose. The wiring method shall be flexible for a length sufficient to permit removal of the cover and provide access to the box interior, and arranged so that any bonding or grounding continuity is independent of the connection between the box and cover.
Top
2017 / 2014 NEC & Related Books and Study Guides
#79703 - 01/13/02 08:55 AM Re: 314.22
sparky66wv Offline
Member
Registered: 11/17/00
Posts: 2342
Loc: West Virginia
Wow... So what do we do with all those shallow boxes (with the 45º corners) that are imbedded in jenny lynn or brick/block walls?

Regular WireMold Extensions not allowed?

Somebody spell this out for me (darn legalese)...

My supplier still sells lots of those boxes (the 45º cornered kind) regardless of my prompting that they are only legal for phone wire!
_________________________
-Virgil
Residential/Commercial Inspector
5 Star Inspections
Member IAEI
Top
#79704 - 01/13/02 09:19 AM Re: 314.22
sparky Offline
Member
Registered: 10/18/00
Posts: 5545
This was 370-22 in the '99.

It is confusing, I question the mag article, which is (pix) basicaly outlawing 4 sq extension rings

Are we to read this into it??
Top
#79705 - 01/13/02 09:52 AM Re: 314.22
resqcapt19 Offline
Member
Registered: 11/10/00
Posts: 2209
Loc: IL
guys,
This rule is to prohibit the mounting of boxes over existing flush boxes. When you need to add something on over a flush box, this change is only requiring that you use an extension designed for the purpose. The prohibits the installation of boxes (boxes have backs, extensions have openings it the back that match the size of the opening in the flush box) over flush boxes. This is intended to allow access to the wiring in the flush box without having to remove a box installed on top of the flush box.
Don(resqcapt19)
_________________________
Don(resqcapt19)
Top
#79706 - 01/13/02 10:17 AM Re: 314.22
sparky66wv Offline
Member
Registered: 11/17/00
Posts: 2342
Loc: West Virginia
Oh... Thanks, Don...

I was freakin' there for a minute!
_________________________
-Virgil
Residential/Commercial Inspector
5 Star Inspections
Member IAEI
Top


ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals