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December 3, 2009 A Penton Media Publication Vol. VII No. 23



CONTENTS
Pending Code Change Item for 2011 NEC

What's Wrong Here?

Code Q&A

Code Quiz

Calling All Code Writers

Electric West 2010



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    Change Proposals
    Pending Code Change Item for 2011 NEC
    As noted in the NEC Committee Report on Proposals, 2010 Annual Revision Cycle, Code-Making Panel 17 has voted to accept a Code change submitted by Gary L. Siggins, Underwriters Laboratories, Inc. (Log #2357 NEC-P17). The recommendation calls for revising the text of 680.2 as follows:

    "Dry-Niche Luminaire. A luminaire intended for installation in the floor or wall of a pool, spa, or fountain in a niche that is sealed against the entry of pool water."

    As noted in the substantiation summary, this change will clarify that new luminaire designs can also be used in floor mounting applications and in spas. This change also supports deletion of the word "pool" from the summary text, as their application is now more widespread.

    You can download an electronic version of the report via the NFPA Web site.

    Although the comment period is now closed, the results of the committee action on all submitted comments will be published in the NEC Committee Report on Comments, which will be made available to all who request it. The Report on Comments mail date is scheduled for March 29, 2010.


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    Code Challenge
    What's Wrong Here?

    By Brian J. McPartland

    Think you know how this installation violates the NEC?

    Visit EC&M's Web site to see the answer.

    Hint: Raceway-supported box


    Code Q&A
    By Mike Holt
    Q. I recently saw a service disconnect that was being used as a conduit for two feeder circuits. Is this legal?

    Visit EC&M's Web site to see the answer.


    Code Quiz
    By Steven Owen
    A question has arisen related to the installation of a new 112.5kVA dry-type transformer, which is equipped with ventilated openings. The transformer will be located in an electrical equipment room, directly across from a 480V switchboard. The rear of the transformer will be pushed tight against a concrete wall. The distance between the front of the transformer and the front of the switchboard will be 48 in. Why was this proposed installation rejected by the AHJ?

    1. It was turned down because a 112.5kVA dry-type transformer must be installed in a vault or a room of fire-rated construction with a 3-hour fire rating.
    2. It was turned down because the distance between the transformer and the switchboard should have been 60 in.
    3. It was turned down because the transformer was pushed tight to the concrete wall, which will reduce air flow needed to cool the transformer, as required by the manufacturer and the NEC.
    4. The AHJ is wrong. There was no need to reject the installation as it is compliant with the requirements of the NEC.

    Visit EC&M's Web site for the answer and explanation.


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    Code News Update
    Calling All Code Writers
    Don't miss an opportunity to help create the next edition of NFPA 70E, Standard for Electrical Safety in the Workplace. Time is running out! You have between now and Jan. 5, 2010 to submit your proposals for new requirements, revisions to existing requirements, or deletion of existing requirements. But don't just fly by the seat of your pants and submit a poorly worded submission without any technical justification. It's important that you draft your proposal in a clear and simple manner and back it up with technical justification. You must convince the Code committee members that your change makes sense for all parties involved. You can download a proposal form directly from the NFPA Web site.


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    Shows and Events





    Electric West 2010

    The Electric West Show, to be held March 16-18, 2009 at the Las Vegas Convention Center, is the perfect place to brush up on the latest NEC topics — and earn continuing education credits in the process. Geared toward electrical contractors, consulting & specifying engineers, electricians, and plant facility personnel, the conference program will offer the following NEC seminars, presented by industry experts such as Mike Holt, Keith Lofland, and Edward Gorginian.
    • Analysis of 2011 NEC Changes
    • Understanding Important NEC Requirements
    • Dwelling Calculations
    • Advanced NEC Calculations
    • Grounding vs. Bonding
    • Swimming Pools and Similar Installations
    For more information, visit our Web site, or click here to register.



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