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Extension Boxes #77587
06/27/01 06:43 AM
06/27/01 06:43 AM
electure  Offline
OP
Member
Joined: Dec 2000
Posts: 4,264
Fullerton, CA USA
Many inspectors in the area will not allow any conduits or cables to be run from the KO's in extension boxes (although it's regularly seen in older existing work).
Is this a valid call? What section would cover this (if any)?

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Re: Extension Boxes #77588
06/27/01 04:19 PM
06/27/01 04:19 PM
Tom  Offline
Member
Joined: Jan 2001
Posts: 1,044
Shinnston, WV USA
I can understand their caution since brand X extensions may not fit real well to a brand Y box. They may also be concerned about the length of the wire in the regular box not being long enough.

However, there is nothing in the NEC that I am aware of that would prohibit this & there is nothing in the listing of the extension box that prohibits this.

Have any of the inspectors given you any justification for this practice?

Tom


Few things are harder to put up with than the annoyance of a good example.
Re: Extension Boxes #77589
06/27/01 04:30 PM
06/27/01 04:30 PM
S
sparky  Online Content
Member
Joined: Oct 2000
Posts: 5,344
i know of one inspector who will not allow extensions. he is very good with the code, yet spends much time in civil court over items others would not bother with.

Re: Extension Boxes #77590
06/27/01 07:16 PM
06/27/01 07:16 PM
electure  Offline
OP
Member
Joined: Dec 2000
Posts: 4,264
Fullerton, CA USA
There was never any justification made that I know of. The guys in the field had at least 4S boxes, proper conductor lengths, and the extensions were grounded with approved ground clips. They still were turned down. It got so bad that we eventually just banned the practice as a company policy so we didn't have to send a truck 75 miles to change them. (Then why do they have KO's?)
This happened all over the place, too, not just 1 city. ??????????

Re: Extension Boxes #77591
06/27/01 07:28 PM
06/27/01 07:28 PM
sparky66wv  Offline
Member
Joined: Nov 2000
Posts: 2,236
West Virginia
While working Industrial in Wisconsin, we weren't allowed to use extensions on any "new construction"... the premise being that the system should have been designed right in the first place, but old work was OK.

Here in WV, it's a life-saver...
I wish they made a 4" extension for a 3" octagonal box...

I only use extensions in new work on very rare circumstances.


-Virgil
Residential/Commercial Inspector
5 Star Inspections
Member IAEI
Re: Extension Boxes #77592
06/27/01 08:16 PM
06/27/01 08:16 PM
R
Redsy  Offline
Member
Joined: Mar 2001
Posts: 2,056
Bucks County PA
How, then would one make a surface extension from a flush mounted box?

Re: Extension Boxes #77593
06/27/01 08:23 PM
06/27/01 08:23 PM
sparky66wv  Offline
Member
Joined: Nov 2000
Posts: 2,236
West Virginia
Hubble makes a surface mounted extension for flush mounted boxes, they're plastic and ivory in color. When in a pinch, they'll work, I've used them to "stretch" SWB's to get a dimmer in them. (Old work)

I hope this is what you were referering to, Redsy.

[This message has been edited by sparky66wv (edited 06-28-2001).]


-Virgil
Residential/Commercial Inspector
5 Star Inspections
Member IAEI
Re: Extension Boxes #77594
06/28/01 07:15 AM
06/28/01 07:15 AM
electure  Offline
OP
Member
Joined: Dec 2000
Posts: 4,264
Fullerton, CA USA
Redsy, you've got an excellent point there. The "EA" type (1 gang to 4-S) of extension boxes would all be sent to the dumpsters. I've used these on a regular basis forever for surface ext's and not ever been hassled.
I'm at a total loss here.????

Re: Extension Boxes #77595
06/28/01 09:12 AM
06/28/01 09:12 AM
R
Redsy  Offline
Member
Joined: Mar 2001
Posts: 2,056
Bucks County PA
Quote
Originally posted by sparky66wv:
Hubble makes a surface mounted extension for flush mounted boxes, they're plastic and ivory in color. When in a pinch, they'll work, I've used them to "stretch" SWB's to get a dimmer in them. (Old work)

I hope this is what you were referering to, Redsy.
I actually was referring to an extension of the whole wiring system to additional devices. But, I'm glad you mentioned those. I do some real-estate work, and often have to add GFCI receptacle to old (small) wall boxes. I have used plastic wiremold device boxes on top of the wall case to allow installation of the larger device, but was unsure about the practice. I wonder if this is the same as using the Hubbells.[This message has been edited by sparky66wv (edited 06-28-2001).]

Re: Extension Boxes #77596
06/29/01 05:40 PM
06/29/01 05:40 PM
S
sparky  Online Content
Member
Joined: Oct 2000
Posts: 5,344
wiremould makes extensions too...

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