User Tag List

Page 1 of 2 1 2 LastLast
Results 1 to 10 of 16

Thread: Panelboard cover gap

  1. #1
    Join Date
    Nov 2004
    Location
    Indiana
    Posts
    174
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Panelboard cover gap

    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.

  2. #2
    Join Date
    Sep 2018
    Location
    PA
    Posts
    99
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Hi,
    Not sure if this will help with your question. Every panel I have worked with has a panel face that is adjustable to sit tight against the circuit breaker’s. Kind of like an extension ring for electrical device box that sits back into a wall. Have a great day.

    jim

  3. #3
    Join Date
    Dec 2007
    Location
    NE Nebraska
    Posts
    41,346
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by jksmith82 View Post
    Hi,
    Not sure if this will help with your question. Every panel I have worked with has a panel face that is adjustable to sit tight against the circuit breaker’s. Kind of like an extension ring for electrical device box that sits back into a wall. Have a great day.

    jim
    Some have adjustment on the mounting of the panel in the cabinet to bring it forward if needed to fit the cover properly. Usually only need to adjust them if flush mounted and the front of cabinet is recessed a little.
    I live for today, I'm just a day behind.

  4. #4
    Join Date
    Dec 2007
    Location
    NE Nebraska
    Posts
    41,346
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    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.
    I don't know there is any code to cite here. 312.5(A) only applies to openings that conductors pass through. 110.12(A) is about the only other thing that maybe could be cited. Design of some of those covers isn't going to be completely closed at times, nothing in there that says how much gap is acceptable and IMO is a judgement call. I can show you N3R loadcenters with a 3/4" inch or so gap at the top, but outer cover won't hinge properly if they don't leave that much room, and there is no adjusting them, they are made that way.
    I live for today, I'm just a day behind.

  5. #5
    Join Date
    Nov 2004
    Location
    Indiana
    Posts
    174
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Thank you. That helps.

  6. #6
    Join Date
    Dec 2011
    Location
    Ocala, Florida, USA
    Posts
    3,090
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by jksmith82 View Post
    Hi,
    Not sure if this will help with your question. Every panel I have worked with has a panel face that is adjustable to sit tight against the circuit breaker’s. Kind of like an extension ring for electrical device box that sits back into a wall. Have a great day.

    jim
    A perfect example of things most "electricians" fail to realize. I believe part of the reason is that very few actually read through the paperwork that comes with equipment, even once. Square D NF panels have four screws that thread in the corners, you screw them in further to bring the face of the guts out. I rarely see these screws installed.

    One of my favorite examples of this, and I use in in my apprenticeship class, is the instruction that all threaded connections in Bell boxes need Teflon tape or thread seal compound in order to be watertight. It is right there on the little piece of paper you remove from every box.


    I know what I don't know, and I know where to go to find it!

  7. #7
    Join Date
    Dec 2007
    Location
    NE Nebraska
    Posts
    41,346
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Strathead View Post
    A perfect example of things most "electricians" fail to realize. I believe part of the reason is that very few actually read through the paperwork that comes with equipment, even once. Square D NF panels have four screws that thread in the corners, you screw them in further to bring the face of the guts out. I rarely see these screws installed.

    One of my favorite examples of this, and I use in in my apprenticeship class, is the instruction that all threaded connections in Bell boxes need Teflon tape or thread seal compound in order to be watertight. It is right there on the little piece of paper you remove from every box.
    You must buy your NF panels from some other company Mine always had a washer type nut that is supposed to go on the mounting studs before you mount the guts, if the guts need adjusted out you turn those nuts to move the "stop" further forward. If you don't install those nuts before mounting guts, you can't make that adjustment.

    I am aware of bell box requirements, but typically ignore them. If you have raceway entering top you likely to have condensation in the box no matter how well you seal threads. Drainage holes IMO are more important.
    I live for today, I'm just a day behind.

  8. #8
    Join Date
    Jul 2003
    Location
    New Jersey
    Posts
    27,386
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    It's strange that you cannot have more than a 1/8" gap along the edge of the panel but there is no maximum distance that it can be set back.

    312.4 Repairing Noncombustible Surfaces. Noncombustible surfaces that are broken or incomplete shall be repaired so there will be no gaps or open spaces greater than 3 mm (1⁄8 in.) at the edge of the cabinet or cutout box employing a flush-type cover
    .
    Rob

    Moderator

    All responses based on the 2014 NEC unless otherwise noted

  9. #9
    Join Date
    Dec 2011
    Location
    Ocala, Florida, USA
    Posts
    3,090
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by kwired View Post
    You must buy your NF panels from some other company Mine always had a washer type nut that is supposed to go on the mounting studs before you mount the guts, if the guts need adjusted out you turn those nuts to move the "stop" further forward. If you don't install those nuts before mounting guts, you can't make that adjustment.

    I am aware of bell box requirements, but typically ignore them. If you have raceway entering top you likely to have condensation in the box no matter how well you seal threads. Drainage holes IMO are more important.
    Oops I just looked it up. That is NQ panelboards not NF panelboards I was referring to. Thanks for keeping me honest.


    I know what I don't know, and I know where to go to find it!

  10. #10
    Join Date
    Dec 2007
    Location
    NE Nebraska
    Posts
    41,346
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Strathead View Post
    Oops I just looked it up. That is NQ panelboards not NF panelboards I was referring to. Thanks for keeping me honest.
    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.
    I live for today, I'm just a day behind.

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •