basement wiring

[rjlight]

I see a lot of older homes where romex is run in conduit along the basement (concrete) wall in conduit. However, when it gets to the ceiling joists it comes out of metal conduit and is then attached to ceiling joists. What kind of bushing/protector is needed where conduit ends? Also, what are the acceptable or most commonly used conduits for this application today?

 

[bphgravity]

Re: basement wiring

Check out 300.16(A) and (B) for this issue. Basically, you need to use some sort of insulating connector or bushing where the cable emerges from raceway to open wiring.

For NM cable, 334.15(B) provides the raceways which the code permits for protection from damage.

 

[wayne123]

Re: basement wiring

I always use an emt connector or coupling on the end of the conduit to protect the NM. I don't know if there is a manufacturer that make a bushing for this application, but it sure would be a good idea.

 

[stew]

Re: basement wiring

use a connector and a threaded plastic bushing for additional protection.

[ April 26, 2004, 12:55 PM: Message edited by: stew ]

 

[electricman2]

Re: basement wiring

Arlington makes a bushing for this application. Here is the link.

 

[hbiss]

Re: basement wiring

I may be the only dissenter here, but I don't think I have ever used a connector or bushing when sleeving NM. If there is no connector at either other end of the conduit and the NM is not stripped of its jacket then the NM is sleeved. No connector or bushing is required. Just make sure you ream the ends properly.

-Hal

 

[iwire]

Re: basement wiring

Hal you could get picked up on that.

300.15(C) Protection. A box or conduit body shall not be required where cables enter or exit from conduit or tubing that is used to provide cable support or protection against physical damage. A fitting shall be provided on the end(s) of the conduit or tubing to protect the cable from abrasion.

You do not need a bushing just a fitting will do.

By the way I do not think the Arlington one is listed for line volt use.

[ April 26, 2004, 05:01 PM: Message edited by: iwire ]

 

[gserve]

Re: basement wiring

They make a fitting for NM that ia a combo emt to romex connector

 

[goldstar]

Re: basement wiring

web page
This is the website for a photo of Arlington's # 8600 rx to emt fitting. I believe this is the correct fitting to be used as gserve mentioned.

 

[electricman2]

Re: basement wiring

quote by iwire

By the way I do not think the Arlington one is listed for line volt use

Bob, I cannot find anything at UL that indicates this bushing is not for line voltage. They are listed under FKAV.E20643. I'm not the sharpest knife in the drawer, maybe I'm missing something

 

[iwire]

Re: basement wiring

It may have changed, but in Arlington's ads in EC&M they always made clear that they where not for line voltage.

It is entirely possible that they are now listed for that too.

I do use them often in sizes 3/4" to 4" for voice/data applications.

[ April 26, 2004, 09:17 PM: Message edited by: iwire ]

 

[jemsvcs]

Re: basement wiring

You can spend the extra money in using connectors with bushings, but your local supplier should be able to get you some bushings that slip right on the end of your conduit (and they are available for cheap).