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  1. #1
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    Mar 2011
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    Canada, Québec, Brossard
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    Default Electrical entrence on roof

    Hi,

    I came across an electrical entrance that was installed on the roof, going under a roof balcony. it is a contractor who renovated the building and I am not familiar with those kind of installation. I wanted to know is it safe?

    Thank you

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  2. #2
    Join Date
    Jun 2008
    Location
    Maryland
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    Default Re: Electrical entrence on roof

    Was there a service disconnect on the exterior anywhere? Where on the interior was the panel board located and how far does the SEC travel through the interior of the building before reaching the panel board?


  3. #3
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    Mar 2011
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    Canada, Québec, Brossard
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    Default Re: Electrical entrence on roof

    Quote Originally Posted by John Dirks Jr View Post
    Was there a service disconnect on the exterior anywhere? Where on the interior was the panel board located and how far does the SEC travel through the interior of the building before reaching the panel board?
    Hello John,
    There was no service disconnect on the exterior, the panel board was located on the last floor of the building and the SEC was traveling about 10 to 12 feet before reaching the panel board.


  4. #4
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    Default Re: Electrical entrence on roof

    Quote Originally Posted by Eli Smith View Post
    Hello John,
    There was no service disconnect on the exterior, the panel board was located on the last floor of the building and the SEC was traveling about 10 to 12 feet before reaching the panel board.

    Off the top of my head I'm not sure if the exterior routing across the roof is ok or not. However, the SEC should not travel the distance you listed without having a disconnect before it enters the building. And when a disconnect is on the exterior, the panel board then becomes a sub panel and the equipment grounds and neutrals should be separated. They should only be bonded at the exterior main disconnect.


  5. #5
    Join Date
    Mar 2011
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    Canada, Québec, Brossard
    Posts
    30

    Default Re: Electrical entrence on roof

    Quote Originally Posted by John Dirks Jr View Post
    Off the top of my head I'm not sure if the exterior routing across the roof is ok or not. However, the SEC should not travel the distance you listed without having a disconnect before it enters the building. And when a disconnect is on the exterior, the panel board then becomes a sub panel and the equipment grounds and neutrals should be separated. They should only be bonded at the exterior main disconnect.
    Great info, thanks a lot!


  6. #6
    Join Date
    Aug 2008
    Location
    Maryland
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    Default Re: Electrical entrence on roof

    Where was the actual connection at the meter? Did it come up the wall and over the roof?

    All answers based on unamended National Electrical codes.

  7. #7
    Join Date
    Aug 2011
    Location
    Bennett (Denver metro), Colorado
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    1,394

    Default Re: Electrical entrence on roof

    Quote Originally Posted by John Dirks Jr View Post
    Off the top of my head I'm not sure if the exterior routing across the roof is ok or not. However, the SEC should not travel the distance you listed without having a disconnect before it enters the building. And when a disconnect is on the exterior, the panel board then becomes a sub panel and the equipment grounds and neutrals should be separated. They should only be bonded at the exterior main disconnect.
    I disagree. The SEC are in conduit. There is no distance limitations until it actually enters the house. The photos don't show any problems with the service.

    If you choose not to decide, you still have made a choice.

  8. #8
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    Aug 2008
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    Maryland
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    Default Re: Electrical entrence on roof

    Those look more like a feeder or branch circuit instead of a service.

    All answers based on unamended National Electrical codes.

  9. #9
    Join Date
    Jun 2008
    Location
    Maryland
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    Default Re: Electrical entrence on roof

    Quote Originally Posted by Lon Henderson View Post
    I disagree. The SEC are in conduit. There is no distance limitations until it actually enters the house. The photos don't show any problems with the service.
    My point was about the distance of SEC run on the inside of the building. I think you misunderstood what I said.


  10. #10
    Join Date
    Mar 2007
    Location
    Ormond Beach, Florida
    Posts
    26,250

    Default Re: Electrical entrence on roof

    Quote Originally Posted by Lon Henderson View Post
    I disagree. The SEC are in conduit. There is no distance limitations until it actually enters the house. The photos don't show any problems with the service.
    And it entered the hose as soon as it crossed under that deck. From that point on, the disconnect is required to be located 'close to the point of entrance' of the service entrance conductors, i.e., 'close to the point where it goes under the deck'.

    Also, the conductors in those conduits need to be derated for being in conduit and on a roof.

    Jerry Peck, Construction / Litigation Consultant
    Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )
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