Burried NM splices without a box

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kornbln said:
In this video from This Old House at about 2 minutes in, what type of splices are those on the NM that they are showing? Are those the infamous Tyco splices that can be buried?
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They really can't be buried, they can be fished-in and that would make them accessible in order to make the connection.
 
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benaround said:
kornbln said:
In this video from This Old House at about 2 minutes in, what type of splices are those on the NM that they are showing? Are those the infamous Tyco splices that can be burried?

They really can't be burried, they can be fished-in and that would make them accessible

in order to make the connection.
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I don't see anywhere in 334.40(B) where they need to be accessible. The splice would only be accessible if you set it up that way but the next EC would not know the splice was fished in the wall.

334.40 Boxes and Fittings.

(B) Devices of Insulating Material. Switch, outlet, and tap devices of insulating material shall be permitted to be used without boxes in exposed cable wiring and for rewiring in existing buildings where the cable is concealed and fished. Openings in such devices shall form a close fit around the outer covering of the cable, and the device shall fully enclose the part of the cable from which any part of the covering has been removed. Where connections to conductors are by binding-screw terminals, there shall be available as many terminals as conductors.
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I watched that entire series about that timberframe home. Those prefabed outside wall panels were double insulated to either R32 or R35. All electrical, alarm and data wiring was in a special pocket on the inside with removable panels.

The roof panels wre 10" thick! The home was very green using much recycled materials.
 
I saw at the BO store they have NM splice devices that they show needing no junction box. They look weenie to me. Can you realy bury those things in a wall??:-?
 
iaov said:
Those look like the same thing or very similar. Any experience with these? Any thoughts about them?
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The only time I've ever seen them is when I work on new modular homes being set in place. The factory puts them on the NM that needs to be connected from one half of the house to the other. Most are in the basement so access is not a problem, although a few are hidden in the attic or roof. The latter is typically the smoke circuit.

So I've never installed any, just clicked 'em together.
 
Next time I'm at the big orange store I'll take a closer look at the packaging and see what what code ref is on there. I remember it said 334 I just don't remember what came after that. I have my doubts about a "slice in" connector. The area of the point of connection between wire and slicer/splicer is extremely small.
 
This was one of the questions that came up at the code meeting in Raleigh and the CMP member who answered the question said it is legal.

In the very little work I have done on modular homes I have already replaced one connector. I would not bury them but apparently they are legal according to much of the info I have read.
 
With these things being sold at the big box store I see the potential for problems. Joe DIYer making making splices and burying them in inaccesable places and having problems. These could be extremely expensive to remediate.
 
On another note I don't understand allowing what looks like a shakey connector to be hidden away but wire nuts, wich I think are a much more positive connection than these cheesy things, have to be in a box wich is accessable.
 
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