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Thread: Box for the Low Voltage jacks

  1. #1
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    Box for the Low Voltage jacks

    Does the NEC code allow Plaster rings without a box, in a drywall wall in a commercial building?

  2. #2
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    why not. There are listed such devices.
    The only caveat is if it is a fire rated wall or the designer specifies other for reasons as sound or draft.

  3. #3
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    I think that is a building code and not an NEC issue. Unfortunately, I do not know the answer
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  4. #4
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    I have seen plaster rings screwed directly to the stud on interior, non-rated (the wall between the bathroom and bedroom in a hotel for example) walls for thermostats... We never use open back boxes or LV-1 boxes in commercial though, most walls in hotels are rated for fire and sound, and since 95% of our devices or in those walls, or ceilings, you must use a full or closed back box in those cases

    You would need to look at the listing/instructions of the plaster ring to see if screwing it to the stud is permissible by 110 3B. Also have a look at 300.21. the rest of it would be in your local building codes.
    Electricians do it until it Hertz!

  5. #5
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    Building code/Energy code often comes into play on exterior walls. Fire rated walls also make open rings not usable but otherwise ok to my knowledge.


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  6. #6
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    Dec 2010
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    Are you guys calling these plaster rings?


    If so, they are not called plaster rings, they're called low voltage brackets. A plaster ring goes on a box.
    If you aim at nothing, you will hit it every time!

  7. #7
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    Plaster ring.



    Here's another thread. Please do not post the same question twice.

    http://forums.mikeholt.com/showthread.php?t=194491
    Rob

    Moderator

    All responses based on the 2014 NEC unless otherwise noted

  8. #8
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    Hawthorne, New York NEC: 2014
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    Old work and new work. I use the "brackets" (actually Caddy MPLS) for cut-in work. For new work I use a plaster ring or the Caddy MP1S (shown in that other thread). Plaster rings are cheaper.

    -Hal

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