Are splices required to be performed in a junction box?

[larrypark45]

I have scoured the NEC and cannot find anything except in Temporary wiring that says splices must be performed in a junction box.

Hopefully one of you code experts can help point me to the right location in this code book to put my mind at rest - and to finish this report!!

Thanks in advance,
Larry Park

 

[Dennis Alwon]

Check here

300.15 Boxes, Conduit Bodies, or Fittings — Where Required.
A box shall be installed at each outlet and switch point for
concealed knob-and-tube wiring.
Fittings and connectors shall be used only with the specific
wiring methods for which they are designed and listed.
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 (L).

 

[al hildenbrand]

And don't overlook 300.16(A), and 394.56, and 396.56.

 

[petersonra]

I have scoured the NEC and cannot find anything except in Temporary wiring that says splices must be performed in a junction box.

Hopefully one of you code experts can help point me to the right location in this code book to put my mind at rest - and to finish this report!!

Thanks in advance,
Larry Park

Splices don't require a junction box. They generally do require some kind of enclosure though. For instance, you can make splices inside a panelboard.

 

[joebeadg]

no, just have to be "in site of" JB NOT!

 

[JFletcher]

Short answer, no. They are generally required to be enclosed though.

In addition to what has been previously mentioned, chapter 3 splices can also be made in luminaires, and I believe raceways if the LB volume is sufficient. Chapter 8 splices do not require a junction box, and splices for things that are outside the NEC, like overhead service conductors and utility work are frequently made in open-air, and furthermore are not insulated.

Underground splices for cable types like UF also do not require boxes or enclosures.

Welcome to The Forum

Eta: I would have to check with the provisions of article 590, temporary wiring, to see what exceptions are in there regarding splices. I have seen many a homemade lighting stringers on commercial job sites with open-air splices.

 

[LarryFine]

Then there are these:

 

[JFletcher]

Then there are these:

View attachment 21585

Yep. Very familiar with them, they are covered by article 334.40b as well as trailer type wiring devices where the device is also the splice point, no box per se.

 

[tkb]

...

 

[al hildenbrand]

. . .point me to the right location in this code book to put my mind at rest - and to finish this report!!

So, Larry, how's the report going?

I suspect you got way more than you bargained for.

 

[DBoone]

Then there are these:

View attachment 21585

Where are these allowed to be used. What code article mentions them.

 

[packersparky]

Where are these allowed to be used. What code article mentions them.

See post #8

 

[romex jockey]

Then there are these:

View attachment 21585

I've a world of stories about those

none good...:happysad:

~RJ~

 

[LarryFine]

I've a world of stories about those

none good...:happysad:

I've had no issues with them, used the top one mainly to add a receptacle for a TV to an existing circuit.

 

[readydave8]

Then there are these:

View attachment 21585

those look better than the ones I've seen

the ones I've seen had all failed

took a little while to find

 

[DBoone]

those look better than the ones I've seen

the ones I've seen had all failed

took a little while to find

I previously asked about where to use these

I believe I will just avoid them now

 

[JFletcher]

I've had no issues with them, used the top one mainly to add a receptacle for a TV to an existing circuit.

I've never used the saddle or tap style one.. any tips or tricks with it?

For the above poster, they are used to splice NM cable in walls without a junction box. Like any other connector, they have their uses ..

 

[LarryFine]

I've never used the saddle or tap style one.. any tips or tricks with it?

Only that the feed-through cable needs to be bent to match the change in level. With all of them, bending the conductors to the correct shape is a must.

 

[super grandpa]

Open Splices of Class 2 Cct's

Open Splices of Class 2 Cct's

I've been splicing class 2 circuits "open slices" for 38 years. But I really don't know where it says it's okay to do this in the NEC. This has been one of the longest searches I can recall, been to 725, 300 and have found nothing that says it is permitted. I've been teaching for the past 12 years and always tell students to find it in the NEC, but I'm definitely not seeing something!! HELP

 

[infinity]

I have scoured the NEC and cannot find anything except in Temporary wiring that says splices must be performed in a junction box.

Hopefully one of you code experts can help point me to the right location in this code book to put my mind at rest - and to finish this report!!

For temporary wiring with NM cable or cords a junction box is not required.

590.4(G) Splices. On construction sites, a box shall not be required for splices or junction connections where the circuit
conductors are multiconductor cord or cable assemblies, provided that the equipment grounding continuity is maintained with or without the box. See 110.14(B) and 400.9. A box, conduit body, or terminal fitting having a separately bushed hole for each conductor shall be used wherever a change is made to a conduit or tubing system or a metal-sheathed cable system.