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May 16, 2008 A Penton Media Publication Vol. VI No. 10

CONTENTS
Cast Your Vote Now!

Article 100: Definition of “Neutral Point”

What’s Wrong Here?

Code Q&A

Code Quiz

Learn About the Changes in the 2008 National Electrical Code



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About this Newsletter
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  • Provide information on upcoming Code® seminars and shows.
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    EC&M Product of the Year Competition







    Cast Your Vote Now!

    Do you want the opportunity to win a $100 gift check? If you’re an EC&M subscriber, we invite you to help us select this year’s Product of the Year winner. The deadline for voting is June 22, 2008. To make your voice heard, visit the EC&M Home page anytime before now and then. Click on “vote now and become eligible for a $100 gift check,” located in the center of the page. You can click on a link for each of the 24 category winners to read a brief description of the product features and view a photo. Once you’re finished with your review, you can click on the "vote here for your favorite" link, which allows you to enter in your contact information, choose your favorite product, and click submit. As an added incentive to capture your vote, five lucky voters will be randomly selected to receive one of five $100 gift checks ― so don’t delay. Vote today!

    The competition has honored innovation and excellence in product development in the electrical industry for the past seven years.


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    Top 50 NEC Rules















    Article 100: Definition of “Neutral Point”

    By Mike Holt
    This new term was added to Art. 100. The definition reads as follows:

    “The common point on a 4-wire, 3-phase, 120/208V or 277/480V wye-connected system, the midpoint of a 3-wire, 120/240V single-phase system, or the midpoint of the single-phase portion of a 120/240V 3-phase delta-connected system.

    FPN: The potential of the vectorial sum of the nominal voltages from all other phases that utilize the neutral, with respect to the neutral point, is zero volts.”

    Rather than attempting to include all the concepts needed for the definition of the term “neutral” in a single definition, the Task Group of the Technical Correlating Committee chose to use two interdependent definitions. The definition of “neutral point” describes the point to which the neutral conductor is connected at the source.


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    Code Challenge
    What’s Wrong Here?

    By Joe Tedesco

    Think you know how this installation violates the NEC?

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

    Hint: Box-less devices?


    Code Q&A
    By Mike Holt
    Q. Can the lights in a dwelling unit bathroom be on the same circuit as the bathroom receptacles?

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


    Code Quiz
    By Steven Owen
    Q. When connecting a surge protective device (SPD) grounding conductor of a Type 1 SPD at the service, which of the following connections is permitted? Note: the SPD may be a surge arrester or TVSS.

    1. Equipment grounding terminal in the service equipment.
    2. Grounding electrode for the service.
    3. Grounding electrode conductor.
    4. Grounded service conductor
    5. All of the above are permitted.

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


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    Shows and Events

    Learn About the Changes in the 2008 National Electrical Code
    In two informative and interest-filled days with Mike Holt, you'll learn about major NEC changes that will impact your work, whether you're an electrician, contractor, engineer, designer, or plant/facility maintenance person. You'll also earn continuing education hours and professional development hours.

    Two conferences are scheduled for later this year:
    --September 4-5 in Portland, Ore.
    --September 8-9 in San Antonio

    For more information and to register online, go to http://CodeChangeConferences.com



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