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Thread: Transformer X0 bonding

  1. #11
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    Bonded and done

    Thanks guys! I have always bonded X0 but I'm on another job & noticed no bond so before I open my mind to these guys I thought it best to reach out & verify. Thanks again!

  2. #12
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    for what its worth hood, yes, bond it but i always use a dedicated terminal block for equipments down low attached directly to the chassis, leaving the xo block with just one green bond jumper and a neutral..it also keeps that bare rebar conductor away from those ungrounded lugs... you know, when some one backs a fork lift into the tranny? oh, it happens... also is easy on the inspectors eyes B)

  3. #13
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    Eyes wide shut

    Quote Originally Posted by rambojoe View Post
    for what its worth hood, yes, bond it but i always use a dedicated terminal block for equipments down low attached directly to the chassis, leaving the xo block with just one green bond jumper and a neutral..it also keeps that bare rebar conductor away from those ungrounded lugs... you know, when some one backs a fork lift into the tranny? oh, it happens... also is easy on the inspectors eyes B)
    Yes, I agree, the AHJ always looks at a transformer so when the X0 is bonded they smile! Thanks again guys!!!

  4. #14
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    Quote Originally Posted by Hoodood View Post
    Yes, I agree, the AHJ always looks at a transformer so when the X0 is bonded they smile! Thanks again guys!!!
    You do realize bonding at the first disconnecting means is also an option that is code compliant?
    I live for today, I'm just a day behind.

  5. #15
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    wouldnt that mean a neutral has to be pulled with the primarys? or lines..
    we still want the separate der. neuty bonded, right?

  6. #16
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    Quote Originally Posted by rambojoe View Post
    wouldnt that mean a neutral has to be pulled with the primarys? or lines..
    we still want the separate der. neuty bonded, right?
    EGC with primary yes, neutral only if the primary winding is going to utilize it. Delta primary winding doesn't utilize a neutral conductor.
    I live for today, I'm just a day behind.

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