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  1. #1
    Join Date
    Jul 2010
    Location
    NC
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    122

    Default Moisture in main panel

    Moisture observed on insulation for 4/0 aluminum service conductor, and could this be corrosion on the main 200 amp breaker? Client did not seem too worried, would you recommend turning off the power until this is corrected?

    Sid Alstad

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  2. #2
    Join Date
    Mar 2007
    Location
    Philadelphia PA
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    3,177

    Default Re: Moisture in main panel

    I don't know about turning off the power, but I sure wouldn't pay any attention to what the client thinks!

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  3. #3
    Join Date
    Mar 2007
    Location
    Spring City/Surrounding Philadelphia area
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    3,473

    Default Re: Moisture in main panel

    That sucker needs help ASAP Sidney. Corrosion and staining from moisture definitely......active moisture penetration. Water is ether finding it's way in through the service cable/meter box or there is a plumbing leak above the panel. I've also seen this happen from a leak through a chimney chase and from a leak around a 1st floor window with bad flashing.

    Isn't it funny how some clients think nothing of significant issues and just kind of poo-pooh them?

    Last edited by Nick Ostrowski; 08-17-2010 at 06:30 PM. Reason: typo
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  4. #4
    James Duffin's Avatar
    James Duffin Guest

    Default Re: Moisture in main panel

    Is that panel mounted on an exterior wall?


  5. #5
    Join Date
    Jul 2010
    Location
    NC
    Posts
    122

    Default Re: Moisture in main panel

    Yes, panel is on an exterior wall above the master bedroom/bathroom. Structure has no chimney and I do not think it is from a plumbing leak as this was another foreclosed property and the water was not on until yesterday. There was a small opening under the deck where the main service wires entered. I will attach a picture.

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  6. #6
    Join Date
    Mar 2007
    Location
    Santa Rosa, CA
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    2,481

    Default Re: Moisture in main panel

    sidney,

    A couple of years ago, I ran into heavy condensation in a service equipment panel. The panel was located on an exterior wall (typical for CA) that backed to the foundation crawlspace area. The crawlspace was poorly vented and had significant moisture condensation issues, which had migrated into the panel.

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  7. #7
    James Duffin's Avatar
    James Duffin Guest

    Default Re: Moisture in main panel

    Quote Originally Posted by Gunnar Alquist View Post
    sidney,

    A couple of years ago, I ran into heavy condensation in a service equipment panel. The panel was located on an exterior wall (typical for CA) that backed to the foundation crawlspace area. The crawlspace was poorly vented and had significant moisture condensation issues, which had migrated into the panel.
    That's what I was thinking too. I would dry it out, clean it up, and see what it looks like.


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