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May 20, 2010 A Penton Media Publication Vol. VIII No. 10



CONTENTS
Cast Your Vote for the EC&M Product of the Year!

What's Wrong Here?

Code Q&A

Code Quiz

Selective Coordination Guide



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About this Newsletter
This twice-a-month
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CodeWatch will:

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  • Help you brush up on your ability to apply the Code®.
  • Test your knowledge of the Code® with a Q&A format.
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    Important Notice
    Cast Your Vote for the EC&M Product of the Year!
    Would you like to help pick the prestigious EC&M Product of the Year winner and qualify for a chance to win $100? If you're an EC&M subscriber, make your vote count by visiting the 2010 EC&M Product of the Year category winners list. To review the products, click on the links for each of the 33 category winners to read a brief description and view a photo. Once you're finished with your review, visit the polling page, enter your contact information, choose your favorite product from the drop-down menu, and click submit.

    Your selection will help us identify the 2010 EC&M Product of the Year Platinum, Gold, and Silver award winners. As an added incentive, three lucky voters will be randomly selected to receive a $100 gift check.

    The voting poll will remain open through 5 p.m. on June 18, 2010. Please, only one vote per EC&M subscriber. Any votes received from manufacturers, PR firms, or non-EC&M readers will be discarded.


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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 website to see the answer. Hint: Isolated or non-isolated?


    Code Q&A
    By Mike Holt
    Q. Can I use SER cable in a 4-story multifamily dwelling?

    Visit EC&M's website to see the answer.


    Code Quiz
    By Steven Owen
    When are low-voltage control equipment, relays, motors and the like permitted to be installed in compartments with exposed high-voltage energized parts or high-voltage wiring with respect to equipment that is operating at over 600V?

    1. When the access means is interlocked with the high-voltage switch or disconnecting means to prevent the access means from being opened or removed.
    2. When the high-voltage switch or disconnecting means is in the isolating position.
    3. Option A or B is permitted
    4. It is never permitted to do this in applications over 600V nominal

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


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    Code News Update
    Selective Coordination Guide
    The National Electrical Manufacturers Association (NEMA) has published ABP 1-2010 Selective Coordination. The new white paper provides guidance on how to comply with the 2008 NEC requirements outlined in Articles 620, 700, 701, and 708. Manufacturers have provided detailed technical information on how to select and verify that the overcurrent protective devices offered in the market today can be used to satisfy the requirements of the system specifications and the intent of Code.

    ABP 1 can be downloaded at no charge by visiting the NEMA website.


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