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Thread: Panelboard cover gap

  1. #11
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    Quote Originally Posted by kwired View Post
    Same cabinets are used for both and panelboards mount in same fashion inside them. They also have same outer covers/trims that are sized for the cabinet. Only the inner cover is customized per the panelboard it fits on and comes as part of the panelboard, it always fits or something is bent, damaged, etc. Entire interior may need spaced out in flush installations that aren't quite flush so the outer cover will have a better fit.
    Nope, here is the page from the Square D installation manual. The NF manual shows the thumb wheel you describe.
    elevate.pdf


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  2. #12
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    Quote Originally Posted by Strathead View Post
    Nope, here is the page from the Square D installation manual. The NF manual shows the thumb wheel you describe.
    elevate.pdf
    I will be at site with a NF panel today. It is an outdoor cabinet so the door/trim situation is different, but has same interior panel mounting method as others I have done on indoor installs. I will try to remember to get a picture and post it later.

    The majority of the ones I have installed are 400 amp, maybe something is different with them than with others? They still mount in the same cabinets as those are dependent on the length of cabinet needed more than what goes into them. I line can even use same cabinets for certain units (there are some that only allow one "column of breakers on one side of the bus), but most will require a wider cabinet.
    I live for today, I'm just a day behind.

  3. #13
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    Quote Originally Posted by kwired View Post
    I will be at site with a NF panel today. It is an outdoor cabinet so the door/trim situation is different, but has same interior panel mounting method as others I have done on indoor installs. I will try to remember to get a picture and post it later.

    The majority of the ones I have installed are 400 amp, maybe something is different with them than with others? They still mount in the same cabinets as those are dependent on the length of cabinet needed more than what goes into them. I line can even use same cabinets for certain units (there are some that only allow one "column of breakers on one side of the bus), but most will require a wider cabinet.

    The NF panelboards have a u shaped vertical channel and the thumbwheel behind it. The NQ boards have a z shaped vertical channel and a threaded hole that a 10-32 screw goes in to offset the back.


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  4. #14
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    Quote Originally Posted by Strathead View Post
    The NF panelboards have a u shaped vertical channel and the thumbwheel behind it. The NQ boards have a z shaped vertical channel and a threaded hole that a 10-32 screw goes in to offset the back.
    I have installed more NF than NQ, I thought I remembered them being same thing, but maybe not. Some of the NQ were also 400 amp, and used the same 400 amp main breaker and main breaker kit (I think same kit, definitely same breaker) maybe 400 amp NQ is the same?
    I live for today, I'm just a day behind.

  5. #15
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    Sep 2018
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    Quote Originally Posted by dema View Post
    I am responsible for inspecting an installation. The panelboard covers do not fit. When the outer door is open, there is a gap between the outer cover and the inner cover. I am sure this indicates the panel has not been installed correctly. I would like a code reference that requires this to fit tight. The gap is probably in excess of 1/8". It was more like a quarter inch and they tweaked it and I was sent pictures. Thank you for your help. This is a Siemens single phase 200A surface mount panelboard - new. The 800A panel in the basement also suffers from gaps - perhaps 1/16". Again, the problem was "corrected" and I was sent pictures. I will be going out next week. Thank you.
    Try 314.20 I would consider the panel enclosure to be protecting the surrounding material from an arc or a spark the same as any junction box does. Youve also got 110.3 and 110.12 to argue if that one doesnt work.

  6. #16
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    Quote Originally Posted by dema View Post
    I am responsible for inspecting an installation. The panelboard covers do not fit. When the outer door is open, there is a gap between the outer cover and the inner cover. I am sure this indicates the panel has not been installed correctly. I would like a code reference that requires this to fit tight. The gap is probably in excess of 1/8". It was more like a quarter inch and they tweaked it and I was sent pictures. Thank you for your help. This is a Siemens single phase 200A surface mount panelboard - new. The 800A panel in the basement also suffers from gaps - perhaps 1/16". Again, the problem was "corrected" and I was sent pictures. I will be going out next week. Thank you.
    Can we see the pictures?
    312.4, 110.3(A)(6), 110.12 come to mind.

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