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Thread: metal barn grounding question

  1. #1
    Join Date
    Sep 2004
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    Ohio
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    metal barn grounding question

    Do I having to have a ground rod at all four corners of the barn? The reason I'm asking , on pool the inspector had me bond all sides of the pool.
    gusco

  2. #2
    Join Date
    Dec 2010
    Location
    Tennessee NEC:2008
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    4,074
    The pool bonding was for equipotential bonding, a metal barn has no such requirement.

    Note: unless the barn is close to the pool!

    There is a section for equipotential bonding for agriculture, but just saying a metal barn needs bonding is not a requirement.
    If you aim at nothing, you will hit it every time!

  3. #3
    Join Date
    Jun 2006
    Location
    Ohio
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    20,858
    Quote Originally Posted by guschash View Post
    Do I having to have a ground rod at all four corners of the barn? The reason I'm asking , on pool the inspector had me bond all sides of the pool.
    This is the only requirement that I know of that applies to a metal barn...
    250.104 Bonding of Piping Systems and Exposed Structural
    Metal.

    ....

    (C) Structural Metal. Exposed structural metal that is interconnected
    to form a metal building frame and is not
    intentionally grounded or bonded and is likely to become
    energized shall be bonded to the service equipment enclosure;
    the grounded conductor at the service; the disconnecting
    means for buildings or structures supplied by a feeder
    or branch circuit; the grounding electrode conductor, if of
    sufficient size; or to one or more grounding electrodes used.
    The bonding jumper(s) shall be sized in accordance with
    Table 250.66 and installed in accordance with 250.64(A),
    (B), and (E). The points of attachment of the bonding jumper(
    s) shall be accessible unless installed in compliance with
    250.68(A), Exception No. 2.
    I will have achieved my life's goal if I die with a smile on my face.

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