Repair on wire existing building.

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gaelectric

gaelectric

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Highlands Ranch, CO
I took a CC exam last Saturday and there was a question that asked if you were to make a repair on a wire in an existing building without a junction what method would be used.

Then it went on to name four possible methods. I cannot figure out if this was the one trick question on the test or if there is actually a way. As in using a UF splice kit or something.

I could not find a code reference saying it was allowable.
 
gaelectric said:
I took a CC exam last Saturday and there was a question that asked if you were to make a repair on a wire in an existing building without a junction what method would be used.

Then it went on to name four possible methods. I cannot figure out if this was the one trick question on the test or if there is actually a way. As in using a UF splice kit or something.

I could not find a code reference saying it was allowable.
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Was one of the choices to pull out the damaged wire and replace it?
Other than that you pretty much need to add a junction box of some sort unless the original wiring is K&T.
 
gaelectric said:
...

I could not find a code reference saying it [ wire repair ] was allowable.
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Not only allowed but required. Code reference is most of Article 110. Specifically 110.7 requires the removal of any short or ground fault. 110.8 is subtle and often overlooked, i.e. the wiring method has to be 'recognized.' The recognized wire types in Article 310 do not include wires with damaged insulation. Some of the cable types in 320 - 332 specify conductors with 'continuous' insulation. 110.14 addresses wire termination, joint, free ends and splices. Specifically 110.14(B) 3rd sentence, "All splices and joints and the free ends of conductors shall be covered with an insulation equivalent to that of the conductors or with an identified insulation device."

Now if you are talking about the actual metal conductor being damage and needing repair then that is a different problem as splices are not allowed in some raceways. The specific article in 320-399 applicable to the given raceway type would have to be consulted.
 
If the test was under 2014 NEC, you can now splice an NM cable in a wall without a box using those manufactured home plastic plug together gizmos. This was supported and submitted by IAEI, no less.

Not in my house!
 
fmtjfw said:
If the test was under 2014 NEC, you can now splice an NM cable in a wall without a box using those manufactured home plastic plug together gizmos. This was supported and submitted by IAEI, no less.

Not in my house!
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Are you talking about those connectors they used between modular sections of modular homes? Yikes!

Sorry just realized you did say manufactured home plastic plug gizmos.
 
It was on the 2014 code. And it was about a single wire.

It said listed interconnect. Twist lock connectors and a couple other things that I can't really remember. NM was mentioned.

Any idea what the code reference might be on that method?
 
manufactured home plastic plug together gizmos

manufactured home plastic plug together gizmos

gaelectric said:
It was on the 2014 code. And it was about a single wire.

It said listed interconnect. Twist lock connectors and a couple other things that I can't really remember. NM was mentioned.

Any idea what the code reference might be on that method?
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334.40 Boxes and Fittings.

(A) Boxes of Insulating Material.
Nonmetallic outlet boxes shall be permitted as provided by 314.3.

(B) Devices of Insulating Material.
Self-contained switches, self-contained receptacles, and nonmetallic-sheathed cable interconnector devices of insulating material that are listed shall be permitted to be used without boxes in exposed cable wiring and for repair wiring in existing buildings where the cable is concealed. 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.

(C) Devices with Integral Enclosures.
Wiring devices with integral enclosures identified for such use shall be permitted as provided by 300.15(E).
 
Check the exact problem with the wire and repair it. Don't try to remove or replace it with other one.
You question is little bit confusing and if you want a suitable answer for you, then please elaborate it.
 
gaelectric said:
It was on the 2014 code. And it was about a single wire.

It said listed interconnect. Twist lock connectors and a couple other things that I can't really remember. NM was mentioned.

Any idea what the code reference might be on that method?
Click to expand...

This is one that you had to look at the answers for a hint on where to find the answer. The reference they were looking for is the one fmtjfw quoted above.
 
Thanks guys. This one had me stumped and probably was what caused me to have to take 8 hours of school on code changes.


ETA This might be helpful someday when a guy needs to extend a switch leg to a dining room light being relocated.:eek:hmy:
 
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George Stolz said:
This is one that you had to look at the answers for a hint on where to find the answer. The reference they were looking for is the one fmtjfw quoted above.
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I had a journeyman ask me about this (as best he could recall the question) . I did not get this question on my CC. But I agree that the key here is the word "interconnector" in 334.40(B) and was part of the NEC changes section of the test. I have to admit that this would be a tough one to find if one did not attend a code changes class that discussed this.
Amazing to me that these devices are allowed in any application. I'm with the others, not in my house.
 
gaelectric said:
Thanks guys. This one had me stumped and probably was what caused me to have to take 8 hours of school on code changes.


ETA This might be helpful someday when a guy needs to extend a switch leg to a dining room light being relocated.:eek:hmy:
Click to expand...

Let's talk about that light relocation. I can just hear the conversation with a smart ass inspector now....
inspector:"you fail because this was not a repair. You just chose to move it and it was not a repair per 334.40(B)".
electrician:"oh yes this was repair. When the owner told us to move it we decided to damage the NM first with a Sawsall and then move the light. So yes, this is a repair and we are compliant".
Sadly the NEC is just getting more of this type of nonsense.
 
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