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Thread: Too much corrosion

  1. #1
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    Too much corrosion

    Is there a code article I can site that requires replacement of corroded switchboard enclosures (bottom completely rusted away)? 110.7 Wiring integrity?

  2. #2
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    Not really, though it may affect what you do replace it with.

    NEC isn't really that much about evaluating what is existing for the purpose of determining if it is safe to continue to use, but such conditions do help set a floor for how corrosive the area may be when it comes to selecting new equipment.

    Now depending on circumstances simply drilling weep holes in what was there could possibly have impacted how long it lasts if the reason for corroding away was mostly due to condensation buildup and not because of high amounts of corrosive agents.
    I live for today, I'm just a day behind.

  3. #3
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    The path forward seems obvious to me, it is time to remove and replace, but, not to the owner. The entire bottom of the switchboard(s) and disconnects are missing due to corrosion. Looks like years of neglect and possible flood damage along with close proximity to salt water.

  4. #4
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    I think it would be a basic violation of 110.3. The equipment is no longer suitable for the intended use.
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  5. #5
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    If the corroded switch board is under the control of technically qualified staff with a safety plan in place, there may not be issue, IMHO.

  6. #6
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    NEC is an installation code not a maintenance code.

    The fact the bottom rusted out doesn't mean any NEC code was violated, just that determining conditions of the application may not have been what designer had expected.
    I live for today, I'm just a day behind.

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