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  1. #1
    Join Date
    Oct 2011
    Location
    Lady Lake, FL
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    41

    Default Distribution panel upgrade with lots-o-wire nuts

    Distribution panel in a 1971 home with a 2011 update and it appears all of the old wiring was tied into the breakers via a short length of new wiring and wire nuts. I have seen very few older homes that have been updated and was wondering if this approach is acceptable?

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  2. #2
    Join Date
    Mar 2007
    Location
    Columbus GA
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    3,746

    Default Re: Distribution panel upgrade with lots-o-wire nuts

    There is nothing wrong in using wire nuts and a pigtail to add length to a wire in a panel enclosure.

    ' correct a wise man and you gain a friend... correct a fool and he'll bloody your nose'.

  3. #3
    Garry Blankenship's Avatar
    Garry Blankenship Guest

    Default Re: Distribution panel upgrade with lots-o-wire nuts

    Designated use enclosures are not supposed to be used as junction boxes. That position relates more to conductors feeding through or not germane to the enclosure. The real thrust of this is having adequate space to see / trace wires and it is very loosely enforced. Enforcing it can involve calculating the "cross sectional area"; how much is available, how much is used and after determining all that, is it in compliance ? Your application is fine.


  4. #4
    Robert Meier's Avatar
    Robert Meier Guest

    Default Re: Distribution panel upgrade with lots-o-wire nuts

    Quote Originally Posted by Garry Blankenship View Post
    Designated use enclosures are not supposed to be used as junction boxes. That position relates more to conductors feeding through or not germane to the enclosure. The real thrust of this is having adequate space to see / trace wires and it is very loosely enforced. Enforcing it can involve calculating the "cross sectional area"; how much is available, how much is used and after determining all that, is it in compliance ? Your application is fine.
    IMO it is physically impossible to exceed the 75% maximum fill for splices in a panel.

    312.8 Enclosures for Switches or Overcurrent Devices.
    Enclosures for switches or overcurrent devices shall not be used as junction boxes, auxiliary gutters, or raceways for conductors feeding through or tapping off to other switches or overcurrent devices, unless adequate space for this purpose is provided. The conductors shall not fill the wiring space at any cross section to more than 40 percent of the cross-sectional area of the space, and the conductors, splices, and taps shall not fill the wiring space at any cross section to more than 75 percent of the cross-sectional area of that space.



  5. #5
    Garry Blankenship's Avatar
    Garry Blankenship Guest

    Default Re: Distribution panel upgrade with lots-o-wire nuts

    Quote Originally Posted by Robert Meier View Post
    IMO it is physically impossible to exceed the 75% maximum fill for splices in a panel.
    You're probably right with newer enclosure sizes, but part of making that decision is determining how much, ( what % ), of the enclosure space is already taken by the panel interior/circuit breakers/landing pads/etc or the fused switch guts or whatever. Then you add the wires, any splices, etc and it adds up fast. Especially fast when there is non-device related wiring passing through and/or spliced in there. It is a tough battle to wage. I have seen it called and it was justifyable.


  6. #6
    Rod Corwin's Avatar
    Rod Corwin Guest

    Default Re: Distribution panel upgrade with lots-o-wire nuts

    The main thing to watch for in these type installations is making sure they did not attach 12ga wire to 14ga wire with a 20amp breaker. Would need to be 15amp breaker and preferably 14ga pigtail to eliminate confusion.


  7. #7
    Al Neuman's Avatar
    Al Neuman Guest

    Default Re: Distribution panel upgrade with lots-o-wire nuts

    It's perfectly acceptable to have splices in the panels.

    It's not, however, to have a doorbell transformer. The transformer's primary leads are double tapped off of a breaker. The secondary leads, if standard #18 bell wire, are not insulated for the voltage present in the panel.


  8. #8
    Join Date
    Mar 2007
    Location
    Columbus GA
    Posts
    3,746

    Default Re: Distribution panel upgrade with lots-o-wire nuts

    Quote Originally Posted by Al Neuman View Post
    ...
    It's not, however, to have a doorbell transformer. The transformer's primary leads are double tapped off of a breaker. ...
    Good catch,

    ' correct a wise man and you gain a friend... correct a fool and he'll bloody your nose'.

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