does code require the removal of abandon wiring

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iwire

Moderator
Staff member
Location
Massachusetts
does the code require the removal of abandon unused wiring

In general no, as the NFPA does not own it and really cannot force it's removal.

There are a few sections for low voltage cables that either have to be removed or marked at each end for future use.

Also you cannot leave dead ended conductors in underfloor raceways like walkerduct etc.
 

gadfly56

Senior Member
Location
New Jersey
Occupation
Professional Engineer, Fire & Life Safety
Really? If it's abandoned, it's no longer hooked up. Is the brand new coil of Romex sitting on the floor of a job site a fire hazard?

Sure. The insulation is considered part of the fuel load from a fire safety perspective.
 

iwire

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Staff member
Location
Massachusetts
Also you cannot leave dead ended conductors in underfloor raceways like walkerduct etc.

So you can't leave future wires? whats the harm and reasoning in this proposal?

You may not be failure with 'walker duct' (AKA Underfloor raceways)

Here is a picture of it before the cement is poured in. (Edit: all that you see will be under the cement, the round portions just a 1/8" to 1/4" below the finish so you can break into them at any time in the future for changes.)

WalkerDuct.jpg

Now if you are making changes to an existing set up and you remove a j-box they don't want you to just stuff the dead ended conductors into the raceway. Think about removing a 4" square from the end of an EMT run, would you pull the conductors back to the next box or would you just stuff them into the EMT and leave them there?

ARTICLE 390
Underfloor Raceways

390.1 Scope.
This article covers the use and installation
requirements for underfloor raceways.

390.2 Definition.
Underfloor Raceway.
A raceway and associated components
designed and intended for installation beneath or
flush with the surface of a floor for the installation of cables
and electrical conductors.


390.8 Discontinued Outlets. When an outlet is abandoned,
discontinued, or removed, the sections of circuit conductors
supplying the outlet shall be removed from the raceway. No
splices or reinsulated conductors, such as would be the case
with abandoned outlets on loop wiring, shall be allowed in
raceways.
 
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Speshulk

Senior Member
Location
NY
Sure. The insulation is considered part of the fuel load from a fire safety perspective.

Um . . . ok. :? I've always interpreted "fire hazard" as meaning "could cause a fire." A disconnected and abandoned wire poses no threat, whatsoever.
 

don_resqcapt19

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Staff member
Location
Illinois
Occupation
retired electrician
Sure. The insulation is considered part of the fuel load from a fire safety perspective.
Yes, it is part of the fire load, but compared to the finishes and furnishings of the building it is, in most buildings, such a small part of the total fire load it doesn't make any real difference.
 

roger

Moderator
Staff member
Location
Fl
Occupation
Retired Electrician
So you can't leave future wires? whats the harm and reasoning in this proposal?
IMO, wires installed for future use are not abandoned conductors, they have never been in use and would not meet the definition of abandoned. They are puposely installed and left for a reason.

Roger
 

stickboy1375

Senior Member
Location
Litchfield, CT
IMO, wires installed for future use are not abandoned conductors, they have never been in use and would not meet the definition of abandoned. They are puposely installed and left for a reason.

Roger

I know and agree, but even if they were used before, they could be used again, just like leaving wires for the future that never get used in the future. :) It's all the same to me, just word games.
 

stickboy1375

Senior Member
Location
Litchfield, CT
You may not be familiar with 'walker duct' (AKA Underfloor raceways)




Now if you are making changes to an existing set up and you remove a j-box they don't want you to just stuff the dead ended conductors into the raceway. Think about removing a 4" square from the end of an EMT run, would you pull the conductors back to the next box or would you just stuff them into the EMT and leave them there?

I've actually worked with "walker duct" before, and thanks for the explanation, makes more sense when you look at it like that.
 
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