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Thread: Dry type transformer used as shelf

  1. #1
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    Dry type transformer used as shelf

    Hello,
    I have unsuccessful in finding any code that would prohibit the use of 600V or less, dry type transformer as a shelf/storage. This be placing items such as chemicals, paper, catalog, etc on top. An example is shown in attached picture.
    I cannot find a specific code but feel at the very least not a good practice. Can anyone point me in the right direction?

    Thank you in advance
    Attached Images Attached Images  

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    When I'm cold, I sit on top of them. They warm you right up.

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    If the change made in the first draft report for the 2020 NEC makes it through the process, the following will be added to the end of 450.9
    Transformer top surfaces that are horizontal and readily accessible shall be marked to prohibit storage.
    Don, Illinois
    (All code citations are 2017 unless otherwise noted)

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    Quote Originally Posted by Coppersmith View Post
    When I'm cold, I sit on top of them. They warm you right up.
    You are too far south to have such need.
    I live for today, I'm just a day behind.

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    Quote Originally Posted by kwired View Post
    You are too far south to have such need.
    they are great for warming up the box of donuts. about a half hour is good.
    ~New signature under construction.~
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    Quote Originally Posted by Fulthrotl View Post
    they are great for warming up the box of donuts. about a half hour is good.
    Click image for larger version. 

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    Code references based on 2005 NEC
    Larry B. Fine
    Master Electrician
    Electrical Contractor
    Richmond, VA

  7. #7
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    Well, this facility is trying to improve their electrical safety and risk so questions are being asked about long standing practices/issues/concerns.

    I had thought this would be the correct place to ask this question with all of the experience and diversity here but out of 5 answers only one was serious, valid and helpful. I would have thought that responsible, serious, helpful responses would have been more than 20%.

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    Quote Originally Posted by wbdvt View Post
    Well, this facility is trying to improve their electrical safety and risk so questions are being asked about long standing practices/issues/concerns.

    I had thought this would be the correct place to ask this question with all of the experience and diversity here but out of 5 answers only one was serious, valid and helpful. I would have thought that responsible, serious, helpful responses would have been more than 20%.
    No permanent storage should be permitted. To lay a tool on it temporarily like in your photo, probably not too much of a safety issue.

    More important to maintain needed clearances for ventilation openings IMO, which includes sides and bottom of the unit.
    I live for today, I'm just a day behind.

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    Are we just LOOKING for things to do, now? Is the top of the case part of the designed cooling surface area in some way? Put me in the camp of not caring about anything being set on top as long as it's not so heavy to cause dents, or scratch a nice paint job. Permanent stuff would be an issue if this is considered working space or dedicated space, but for the xformer in and of itself?

    Would we have an issue if a shelf were built over the top of this wasted space? That might be considered permanent, and an issue, though common sense should dictate whether it's an issue or not, if there were discos or switches or panels or something else that you actually needed to get to.

    What about a xformer mounted up on the wall? Can you put a desk under it?

  10. #10
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    It may exists but I have found no Code prohibiting the practice although, as you say, it's a bad idea.
    Since you mentioned safety issues, the picture does not provide depth but I'd be more concerned about required working space for the disconnect located behind (above) the transformer.
    At my age, I'm accustomed to restaurants asking me to pay in advance, but now my bank has started sending me their calendar one month at a time.

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