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#164429 - 06/03/07 08:35 AM MC connectors concealed in walls?  
frankgi  Offline
Member
Joined: Nov 2005
Posts: 11
NJ USA
A very knowledgeable co worker of mine claims to have failed a rough inspection because of an MC connector being used in a box that is to be concealed in a wall. I believe it is a JHA vio. Any thoughts?


"Its all about the small details"

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#164430 - 06/03/07 09:09 AM Re: MC connectors concealed in walls? [Re: frankgi]  
Roger  Offline
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Joined: May 2002
Posts: 1,716
N.C.
I would say there is a misunderstanding somewhere in the translation of the story, or a misinformed inspector.

Roger


#164433 - 06/03/07 12:30 PM Re: MC connectors concealed in walls? [Re: Roger]  
gfretwell  Online Content


Member
Joined: Jul 2004
Posts: 9,099
Estero,Fl,usa
Is he saying the connector is concealed or the whole box(cover not accessible).


Greg Fretwell

#164435 - 06/03/07 01:42 PM Re: MC connectors concealed in walls? [Re: gfretwell]  
frankgi  Offline
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Joined: Nov 2005
Posts: 11
NJ USA
Thanks Roger and Greg for your replies.
It was a plain old side bracketed deep 1900 box with 9 ko's (3 on 3 sides with no internal clamp)used as a switch location (mud ring added) NEC 2005 Art 330 does not mention any vio about MC connectors in walls or concealed locations.


"Its all about the small details"

#164441 - 06/03/07 03:55 PM Re: MC connectors concealed in walls? [Re: frankgi]  
renosteinke  Offline
Cat Servant
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Joined: Jan 2005
Posts: 5,316
Blue Collar Country
I have heard folks claim that 90-degree MC, or flex, fittings had to be treated as an LB would be treated, and remain accessible.

Personally, I do not share this opinion. I do concede that some such fittings have little covers that make them resemble conduit bodies, but I still do not consider them to be the same as conduit bodies.

As for straight connectors .... I'm not sure it's possible to use them without concealing them. The NEC clearly allows for fishing the material ... and it's been quite a while since I saw a box with internal clamps.


#164443 - 06/03/07 04:53 PM Re: MC connectors concealed in walls? [Re: renosteinke]  
iwire  Offline
Moderator
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
I think it is confusion with the requirement that 90 degree FMC connectors stay accessible.


Bob Badger
Construction & Maintenance Electrician
Massachusetts

#164453 - 06/03/07 08:53 PM Re: MC connectors concealed in walls? [Re: iwire]  
gfretwell  Online Content


Member
Joined: Jul 2004
Posts: 9,099
Estero,Fl,usa
The only reason conduit bodies need to remain accessible is so you can pull in new conductors after the walls are closed up. You don't pull new conductors in a cable.


Greg Fretwell

#164456 - 06/03/07 09:46 PM Re: MC connectors concealed in walls? [Re: gfretwell]  
frankgi  Offline
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Joined: Nov 2005
Posts: 11
NJ USA
True Greg...or no one is going to make a splice in an MC 90 connector...imagine that!
Thanks for all the replies!


"Its all about the small details"


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