Butt Splices for Romex

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bob11746

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I need to extend romex to a new service panel. Can I use Panduit type nylon butt or parallel splices? Can these be in the open (next to other runs of romex) or must I put these into a raceway? I assume the raceway cover must be accessible, is there anything else I need to worry about? I will be using this on 12awg romex.

Also, for heavier cable, 8 or 10AWG, what type of splices are acceptable? These will also be located in a raceway.

The raceway is a 4" box channel, can I use a single large diameter connector or grommet and put a dozen or so romex cable through it?

Thanks,
Bob
 
Re: Butt Splices for Romex

Your an engineer,you should not be doing actual wiring.No you can't have open butt splices,there is a adapter to join them without a box but most likely cost more than a box and wire nuts.
 
Re: Butt Splices for Romex

What is this adapter you speak of?

Any other opinions on the feasibility of what I want to do?
 
Re: Butt Splices for Romex

Its a ul listed splice for romex ,we had a thread on it few months back.Have never used one and personally never would.I believe all splices need to be acessable.Ask at a supply house or perhaps some one has the link back to that subject
 
Re: Butt Splices for Romex

Bob
Quick answers are great for those who may have had some experience in the installation process.
For your level, I would read Articles 334, 300 and 314 before I progress any further - asking questions you may develop as you read.
Such as NM Cable needs to be secured to the enclosure, except as per 312.5 exception.
 
Re: Butt Splices for Romex

Blue wire nuts are rated for up to 2 #8 gauge wires as long as accesable they are ok to use.As far as butt splices there was a product that I saw in the supply house awhile ago that was a tap system for NM,there were inline splice kits and T taps to add on :D Not sure if UL listed but when I saw them I said to myself WOW that would make service work a whole lot easier ;)
 
Re: Butt Splices for Romex

Not hijack the thread but close to the same question. About 10 or so years ago I had a problem with a few runs of 10/2 NM to AC units. after digging into it I found that the manufacture of the NM was using butt splices to reconnect the wire in the manufactures process when it would break for what ever reason. these butt splices were under the outer sheath? I showed the problem to our local AHJ and he said he made some calls on it and found out it was totally acceptable to do this? :confused: We complained to the wire manufacture and they did replace the NM but has anyone else had this problem? I haven't seen it since.
 
Re: Butt Splices for Romex

had something similar once.A run of SE aluminum to a range.Had an open hot.Very time consuming but replaced it.Found they had simply put 2 ends together with a band of tape and kept it running. :mad: :mad: :mad:

[ February 22, 2005, 09:01 PM: Message edited by: jimwalker ]
 
Re: Butt Splices for Romex

Thank you edmoon, that'a a helpful comment.

Now does anybody else have any ideas on splicing romex in a raceway? Has anybody used parallel or butt splices for this application?
 
Re: Butt Splices for Romex

Originally posted by bob11746:
Now does anybody else have any ideas on splicing romex in a raceway?
Click to expand...
No, because you would never do such a thing. Splices are not permitted inside of raceways. They must be in an accesible box.


Has anybody used parallel or butt splices for this application?
Click to expand...
No. Twist on wire connectors, AKA "wire nuts" are far more common. Since most "romex" contains solid conductors, butt splices would be a very poor choice.
 
Re: Butt Splices for Romex

I'll try to answer some of your other questions:

Originally posted by bob11746:
I need to extend romex to a new service panel. Can I use Panduit type nylon butt or parallel splices?

I wouldn't. Wire nuts are a much better choice.

Can these be in the open (next to other runs of romex) or must I put these into a raceway?

What are you asking? The cable can be in the open, but the splices cannot. They must be in a box.

I assume the raceway cover must be accessible, is there anything else I need to worry about?

Making sure the cover remains accesible.

I will be using this on 12awg romex.

Also, for heavier cable, 8 or 10AWG, what type of splices are acceptable?

Wire nuts or split bolts.

These will also be located in a raceway.

The raceway is a 4" box channel, can I use a single large diameter connector or grommet and put a dozen or so romex cable through it?

No. Most conectors are only listed for one or two cables.

Thanks,
Bob
Click to expand...
 
Re: Butt Splices for Romex

I believe they are permitted as long as there is access, such as a pulling elbow in conduit, or in my case, a 4" square raceway with covers.

I have many lines to do, I'm looking for a low profile splice, hence the butt or parallel splice.

From all the info I read, the butt and parallel splices are acceptable for solid wire.
 
Re: Butt Splices for Romex

Hi Peter d,
I was compiling my reply when yours came in, Thanks.

What would you use to transition from the end of a 4" box raceway to a dozen or so 12/2 romex?

Bob
 
Re: Butt Splices for Romex

Bob, no offense, you've received some answers here, but I think you need to get some qualified eyes actually looking at your project.

Word alone just cannot convey the message sometimes.

I can't picture in my mind transitioning from a 4" box raceway to a dozen or so 12/2's.

How long is this 4" box raceway??
 
Re: Butt Splices for Romex

Hi Ty,

I am trying to eliminate a large sub panel and bring the wires back to the location of the original service entrance. The origninal need of for the panel is non-existant. There are many wires that I need to extend to the original service panel, but I don't have the room for a large junction box. The 4" raceway is about 20' long, extending from the original panel to the subpanel. I want to use it to run all the former subpanel wires back to the main service panel. All the wires will make it to the raceway, where I will splice with new romex to make the remainder of the run to the main panel.

I have done a lot of electrical work, residential and on jet aircraft, I am a licenced electrical PE, and currently design aerospace electronics. I will be having a electrician friend check over all of my work before I get the UL inspection.
 
Re: Butt Splices for Romex

Bob, I still do not feel right about you doing this work. You are trying to do something that most of the licensed master electricians have never done. Your PE doesn't give you practical knowledge to be able to do this work and after it is done, it may look OK but still be dangerous. You are doing the same thing as being a EE and stamping plans that a ME should have done.

BTW, the AHJ does not do a UL inspection. You are raising a huge red flag with that statement. You really need to reconsider what you are doing. :eek:
 
Re: Butt Splices for Romex

butt splcies are a poor choice as a splice anyway.

and whatever splcie you use needs to be accessible.

don't hide it somewhere that it might get yanked on and come loose and have it be somewhere it cannot be easily found and fixed.
 
Re: Butt Splices for Romex

There is a connector that is UL listed for 12 and 14 romex wire, I think you might also be able to get it for ten not sure though. It is self contained and is listed to take the place of a j box. Modulars, prefab and mobiles have been using these for years. Any questions here is the web link http://www.molex.com/cgi-bin/bv/molex/home_init.jsp?BV_SessionID=@@@@1142728241.1109281321@@@@&BV_EngineID=cccfadddlmedjhfcflgcehedffgdfmk.0&mCnt=/family/intro.jsp&superFamOID=-880 4&pageTitle=Introduction&channel=Products&familyOID=-9408&chanName=family&frellink=Introduction
You might want to check with your local offical to find out if they allow them though.

[ February 24, 2005, 05:01 PM: Message edited by: kendog ]
 
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