Splice behind wall

**zxsmurf** · 10-13-2007, 11:04 AM

1st time on this forum, don't beat me up!
Jw Electric - great trucks- I seen them on rough carp forum.
I'm a general constractor- My dads been wiring for me 19 years. Have a big remodel where we have a few places we need to add onto wires but would not like to put in a junction box. Local supply house- and inspector says they make nothing but I could swear I saw a new product this spring just for this that would pass inspection.
Also, for stapling onto wood studs- do they make any good commercial staplers. His birthday is coming up.
Thanks Rick

**edlee120** · 10-13-2007, 12:15 PM

Originally Posted by zxsmurf

1st time on this forum, don't beat me up!
Jw Electric - great trucks- I seen them on rough carp forum.
I'm a general constractor- My dads been wiring for me 19 years. Have a big remodel where we have a few places we need to add onto wires but would not like to put in a junction box. Local supply house- and inspector says they make nothing but I could swear I saw a new product this spring just for this that would pass inspection.
Also, for stapling onto wood studs- do they make any good commercial staplers. His birthday is coming up.
Thanks Rick

Never tried'em, but here you go:

http://catalog.tycoelectronics.com/T...1394&LG=1&I=13

The NEC reference is to manufactored buildings and such but I believe these or something similiar are approved for use wherever NM is approved.

**zxsmurf** · 10-13-2007, 12:44 PM

Thanks- That saved me alot of time- I think they were advertized in jlc magazine- Any thoughts on the stapler?

**sparkyinak** · 10-13-2007, 05:05 PM

Has any one used theses? I was doubtful at first but they check out. If used correctly, I'm sure it could cut material, labor, costs down. I'm just hesitent to radical new products. No track record to go on just the word of the manufacturer. Kind of like AFCI breakers.

**jwelectric** · 10-13-2007, 06:55 PM

Careful Gentelmen, look closely at the listing of these devices

Product Facts
Voltage rating: 300 VAC RMS
Current rating: 20 amperes
Meets requirements of National Electrical Code, Articles 545, 550, 551

Also let's look at the NEC

300.15 Boxes, Conduit Bodies, or Fittings — Where Required.
Where the wiring method is conduit, tubing, Type AC cable, Type MC cable, Type MI cable, nonmetallic-sheathed cable, or other cables, a box or conduit body shall be installed at each conductor splice point, outlet point, switch point, junction point, termination point, or pull point, unless otherwise permitted in 300.15(A) through (M).

(F) Fitting. A fitting identified for the use shall be permitted in lieu of a box or conduit body where conductors are not spliced or terminated within the fitting. The fitting shall be accessible after installation.

Yes you can use one of these but it must be accessible meaning that it can't be behind a finished wall.

**Speedy Petey** · 10-13-2007, 07:52 PM

Originally Posted by jwelectric

Meets requirements of National Electrical Code, Articles 545, 550, 551

I read that too. No mention of Art. 300 or 334.

**Mark G** · 10-13-2007, 08:19 PM

I use this stapler: http://www.amazon.com/Arrow-Fastener...2324735&sr=8-6

**sparkyinak** · 10-13-2007, 09:11 PM

I saw that too. If you read the listing it was tested under, it states that it meets the requirements of 334.

Tyco listing:
http://database.ul.com/cgi-bin/XYV/t...589&sequence=1

QAAV.GuideInfo Nonmetallic-sheathed Cable Interconnectors:

http://database.ul.com/cgi-bin/XYV/t...589&sequence=1

Outline of Investigation for Nonmetallic Sheathed Cable Interconnectors:

http://ulstandardsinfonet.ul.com/outscope/2256.html

If you this link, it mentions Article 336 which the article for NM when this requirement was written (2001)

The web site the link is from is not a website that would be frequented by residential sparkies. If you dig into the products you will see that at least the ones I read, they are can be used as the NEC applies which allows interconnectors 334.30(C)

**jwelectric** · 10-13-2007, 09:50 PM

Yes this device can be used on NM cable and I am not disputing this.

It can be used on NM cable when as outlined in their listing and labeling which is only for mobile units as outlined in the link of the original post.

For a stick built house the code sections I have posted would rule the installation. The only sections that will allow the Splices and Tap device to be canceled are 545, 550, 551.

If this device is used in a stick built house then the device will be required to be accessible.

**sparkyinak** · 10-13-2007, 10:28 PM

JW, I agree

**Speedy Petey** · 10-14-2007, 08:11 AM

It would seem that 334.40(B) directly allows this. I'm not sure if that tap is what is being described there.
Thing is 300.15(F) takes away any allowance given in 334.40

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