Tyco NM Connectors

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wyboy

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I’ve been through this 100 times but am getting pushback from an electrician who says Tyco NM Connectors may be used to extend a circuit in an existing dwelling if fished through the wall, (changing baseboard to cove heating in this instance). I say just for repair of damaged NM if the wiring is concealed. The code is a bit ambiguous as to what defines damaged but still I say not for extension of the circuit. Who, if anyone, is correct?
 
In my opinion, it is suitable for concealed use, and not limited to repair purposes. I have used them when they were the only practicable solution. I have never heard of an issue with them. I like the tap version for adding a receptacle to an existing line.
 
In the 2011 NEC, 334.40(B) read ". . . 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."

However, in the 2014 NEC it was changed to ". . . 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."

So the question is whether a circuit extension is "repair wiring".

Cheers, Wayne
 
wwhitney said:
In the 2011 NEC, 334.40(B) read ". . . 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."

However, in the 2014 NEC it was changed to ". . . 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."

So the question is whether a circuit extension is "repair wiring".

Cheers, Wayne
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The substantiation for the 2014 change was:
Substantiation: Rewire is defined as providing new wire. Justification for a concealed splice when rewiring occurs seems to be difficult and the concealed splice seems to be unwarranted. However, rewiring in some cases is a burden to owners because of damage to finished surfaces. A safe repair would be a practical solution for an unsafe, existing condition. A concealed splice would always seem to be a last resort and this change would limit the application to those situations.
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All 14 members of panel 7 voted in favor of the change.
 
wwhitney said:
Is anybody left on the 2011 NEC? If the OP is from Wyoming, as the username somewhat suggests, they are on the 2020 NEC.
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We only lost the option to work under 2011 a couple of years ago. I hope we stay on 2014 forever.
 
My understanding is they are permitted concealed repair or addition on old work, inspector said not on new work that was "oops I forgot to run that". In looking at the product that is available here it's only rated to 300V AC, not sure if that is an issue as most devices and residential wireing rated to 600V
Here is how HD listing it:
"Tyco Electronic's Non-metallic splice and tap kits provide a fast and reliable method for splicing or tapping 2 wire w/ ground and splicing 3 wire w/ground non-metallic cables up to 300 volts. They are designed and approved for use in rework within existing structures. Splice and Tap Kits also eliminate wire nuts for installation and replace the conventional method for adding a splice or tap for non-metallic cable without the need for exposed and unsightly junction boxes. NEC approved Article 334-40b."
 
wwhitney said:
Is anybody left on the 2011 NEC? If the OP is from Wyoming, as the username somewhat suggests, they are on the 2020 NEC.

Cheers, Wayne
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In Illinois, all unincorporated areas as well as municipalities that do not adopt a specific code cycle, default to 2008.
 
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