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  1. #1
    Join Date
    Mar 2007
    Location
    Miami, Florida
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    230

    Default Lightning rods on condenser units

    Didnt quite know where to post this one. The lightning rods are attached to the top of the condenser units. What effect, if any, will they have on the units.

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    Bill Siegel
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  2. #2
    Join Date
    Mar 2007
    Location
    Columbus GA
    Posts
    3,741

    Default Re: Lightning rods on condenser units

    When they get hit by lightning, they blow up.

    ' correct a wise man and you gain a friend... correct a fool and he'll bloody your nose'.

  3. #3
    Join Date
    Aug 2007
    Location
    Memphis TN.
    Posts
    4,311

    Default Re: Lightning rods on condenser units

    Quote Originally Posted by Rick Cantrell View Post
    When they get hit by lightning, they blow up.
    Or catch on fire, or melt, Could even Void the Warranty.

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  4. #4
    Join Date
    Jul 2008
    Location
    Utah
    Posts
    383

    Default Re: Lightning rods on condenser units

    Quote Originally Posted by Billy Stephens View Post
    Or catch on fire, or melt, Could even Void the Warranty.
    That's good!


    I know on larger commercial projects where the A/E team includes an EE, lightning protection on all roof mounted equipment and structure is typical. I think it is actually designed to PROTECT the roof mounted equipment. Note the large conductor from the rod to (presumably) the earth.

    I hate sparks from the sky!


  5. #5
    Join Date
    Mar 2007
    Location
    Spring Hill (Nashville), TN
    Posts
    5,829

    Default Re: Lightning rods on condenser units

    The lighting rod is really not for the protection of the HVAC unit, it is for the building. Rick pretty much described what is going to happen, but the current from the lighting strike will hopefully be taken to the the ground and the building will not catch fire, from the strike. It will catch fire from the HVAC unit!

    Unless you are very familiar with lighting arrestor systems, you need to tell your client that they need to have a lighting arrestor contractor inspect the system. They are pretty involved and are not just a bunch of braided cables with spikes on the ends.

    Scott Patterson, ACI
    Spring Hill, TN
    www.traceinspections.com

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