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  1. #1
    Join Date
    Mar 2007
    Location
    Washington State
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    579

    Post Square D panel (no bus bar)

    This is a square D panel downstream of main service equipment. I think I may have seen these before but it's been a long time. The panel has no bus bars or main terminals. Breakers have terminals at both sides of the breaker. One side if for power entering and one side for power leaving. Is there a specific name for these types of breakers/panels.

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  2. #2
    Join Date
    Dec 2007
    Location
    Holladay, UT
    Posts
    565

    Default Re: Square D panel (no bus bar)

    I'm really curious how this panel works etc. Any one have any clue.

    Tom Rees / A Closer Look Home Inspection / Salt Lake City, Utah

  3. #3
    James Duffin's Avatar
    James Duffin Guest

    Default Re: Square D panel (no bus bar)

    I would call it a feed-through breaker but they normally don't mount that way.


  4. #4
    Join Date
    Dec 2007
    Location
    Chico,Ca
    Posts
    423

    Default Re: Square D panel (no bus bar)

    Looks like SQ D QOU frame breakers, lug in, lug out.

    Edit: It does not look like a OEM install more like "Field Engineering".


  5. #5
    Join Date
    Mar 2007
    Location
    Washington State
    Posts
    579

    Default Re: Square D panel (no bus bar)

    "Feed-through breakers" that's a good description. The breakers appear to be installed in factory brackets that are screwed to the panel cover. Neutrals and grounds are separated and bundled with wire nuts. This place was built in 1974, one of the most unique and difficult homes I have ever inspected.

    Does anyone know if Square D still makes this type of breaker and would it be allowed to be used today? I really don't understand the purpose of this type of set up. I'm recommending further review by an electrician.


  6. #6
    James Duffin's Avatar
    James Duffin Guest

    Default Re: Square D panel (no bus bar)

    It looks like the panel still has the label in-place. Check it to see if that panel is approved for that type breaker. The model of the breaker should be on the breaker somewhere.


  7. #7
    Join Date
    Dec 2007
    Location
    Chico,Ca
    Posts
    423

    Default Re: Square D panel (no bus bar)

    SQ D QOU breakers are still avail, now they even mount on DIN rail too.


  8. #8
    Paul Johnston's Avatar
    Paul Johnston Guest

    Default Re: Square D panel (no bus bar)

    Quote Originally Posted by Trent Tarter View Post
    This is a square D panel downstream of main service equipment. I think I may have seen these before but it's been a long time. The panel has no bus bars or main terminals. Breakers have terminals at both sides of the breaker. One side if for power entering and one side for power leaving. Is there a specific name for these types of breakers/panels.
    It looks like it is mounted to the front cover.


  9. #9
    Lou Romano's Avatar
    Lou Romano Guest

    Default Re: Square D panel (no bus bar)

    I have never seen this type panel in a residential application but it is fairly common in marine applications. This type breaker mounted to the cover, is used in shore power pedestals and in yacht panels. I have seen feed through breakers mounted in enclosures for commercial and residential applications but they were mounted on a rail or backboard.


  10. #10
    Join Date
    Dec 2007
    Location
    Holladay, UT
    Posts
    565

    Default Re: Square D panel (no bus bar)

    Trent, Did this house have solar panels?

    Tom Rees / A Closer Look Home Inspection / Salt Lake City, Utah

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