View this email as a Web page Please add Code Watch to your Safe Sender list.

January 10, 2008 A Penton Media Publication Vol. VI No. 1


CONTENTS
408.7 Unused Openings

What's Wrong Here?

Code Q&A

Code Quiz

Michigan Electrical Code Requirements

Electric West


About this Newsletter
This twice-a-month
e-newsletter is brought to you from the publisher of EC&M magazine.

CodeWatch will:

  • Let you know what could be changing in the Code®.
  • Help you brush up on your ability to apply the Code®.
  • Test your knowledge of the Code® with a Q&A format.
  • Provide information on upcoming Code® seminars and shows.
  • Give you an opportunity to sound off on Code®-related issues.

    We want to make sure we're providing you with the content you need to better manage your business or enhance your technical skills. E-mail us and let us know what you want to see in future issues of this e-newsletter. We will do our best to address your request in a future issue of CodeWatch.


    • Subscriptions
    To unsubscribe from this newsletter go to: Unsubscribe

    To subscribe to this newsletter, go to: Subscribe

    To get this newsletter in a different format (Text or HTML), or to change your e-mail address, please visit your profile page to change your delivery preferences.


    Back Issues
    Missed an issue? Visit the CodeWatch archive on EC&M's Web site.

    Tell a friend about CodeWatch
    Do you know of someone who'd like to receive CodeWatch? Visit the subscriber site, enter their e-mail address and spread the wealth!


    Advertising
    To find out how to advertise in this newsletter, e-mail David Miller or call him at (312) 840-8487.

    The designations "National Electrical Code” and “NEC” refer to the National Electrical Code®, which is a registered trademark of the National Fire Protection Association.
     
    ADVERTISEMENT

    ADVERTISEMENT


    ADVERTISEMENT
    Top 50 NEC Rules















    408.7 Unused Openings
    By Mike Holt
     Unused openings for circuit breakers and switches must be closed using identified closures, or other means approved by the authority having jurisdiction, that provide substantially equivalent to the wall of the enclosure.

    Editor's note: This information was extracted from Mike Holt's textbook, Understanding the National Electrical Code

    ADVERTISEMENT
    The Fluke 1735 Power Logger is the ideal electrician or technician's power meter for conducting energy studies and basic power quality logging. Set the Power Logger up in seconds with the included flexible current probes and color display. The power quality meter measures most electrical power parameters, harmonics, and captures voltage events. www.fluke.com/codewatch

    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: Silly support.
    Code Q&A
    By Mike Holt
     Q. Section 110.14(C) requires the use of the 60°C column for 100A or less and the 75°C column for above 100A for conductor sizing. What is the value of THHN rated 90°C if the ampacity cannot be used for conductor sizing?

    Visit EC&M's Web site to see the answer.
    Code Quiz
    By Steven Owen
     Q. Excluding exceptions, which one of the following locations does not require GFCI protection for 15A and 20A, 125V single-phase receptacles?

    1. bathroom (anywhere)
    2. within 6 feet of a sink in a commercial or industrial facility
    3. electric drinking fountain
    4. outdoors on a commercial building
    5. cord-and-plug connected vending machines
    6. outdoors and in or on a floating building or structure within the electrical datum plane
    7. within 20 feet of a decorative fountain
    8. in aircraft hangars where electric diagnostic equipment, electrical hand tools or portable lighting equipment are used
    9. in commercial garages where electric diagnostic equipment, electrical hand tools or portable lighting equipment are used
    10. dwelling unit attics, in accordance with 210.63

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

    ADVERTISEMENT
    Need help defining the parameters of your facility's next Arc Flash Hazard Evaluation? ESA's electrical engineers have written a detailed specification to help you determine what you need for your study. This Arc Flash tool is provided in a Word document that can be easily customized to include your facility's unique requirements. Request your Free Arc Flash Study Specification: Click here.

    Code News Update
    Michigan Electrical Code Requirements
    In late November 2007, Michigan adopted the 2005 Michigan Electrical Code. According to the December 2007 issue of NEMA's electroindustry, the state exempted the following sections of the 2005 NEC: 501.30(B), 502.30(B), 503.30(B), 505.25(B), 506.25(B), 547.1 to 547.10, and Annex G. It also amended the following sections of the 2005 NEC: 230.40, 230.71(A), 250.118, 300.3(B), 334.10, 348.60, and 350.60. It's important to note that Michigan does not allow flexible metal conduit or liquidtight flexible metal conduit to serve as an equipment conductor. The full text of the amended sections may be viewed in this PDF file.

    ADVERTISEMENT
    Cool Electronic Cabinets
    Stop electronic control downtime due to heat, dirt and moisture. EXAIR Cabinet Coolers produce 20 degree Fahrenheit air from an ordinary supply of compressed air to cool electrical controls. Thermostat control minimizes air usage. UL Listed. Maintains the NEMA 4, 4X (stainless steel) and 12 rating of the enclosure. Web site offers detailed information, downloadable drawings and PDF literature.
    www.exair.com/15/540_01a.htm

    Shows and Events




    Electric West
    Year after year, electrical contractors, consultants, engineers, plant managers, and other electrical professionals make it their business to stay on top of the latest industry developments by attending the Electric West Conference program, schedule for Las Vegas from Feb. 27-29. It provides the tools you need to become more efficient, work faster, more profitably and stay ahead of the competition. Categories include:
    • Code Changes & Standards

    • Safety

    • Lighting

    • Residential Applications

    • Industrial Applications

    • Business Practices

    • Home Automation

    For 2008, the Power Quality segment will be expanded into its own separate conference. For more information and to register, visit the Electric West Web site.

    ADVERTISEMENT
    Eliminate Red Tags
    It takes more than the UL Mark on a product to satisfy code requirements. Before your next installation, use UL's Code Compliance Database to identify the correlation between model codes and UL Certified products, as well as find manufacturers of certified products.

    Click here today to find up-to-date UL Listed products at the UL Code Correlation Database.

    You are subscribed to this newsletter as #email#

    For questions concerning delivery of this newsletter, please contact our Customer Service Department at:
    Customer Service Department
    EC&M
    A Penton Media publication
    US Toll Free: 866-505-7173
    International: 847-763-9504
    Email:ecmweb@pbinews.com

    Penton Media | 249 W. 17th Street | New York, NY 10011

    Copyright 2007, Penton Media, Inc. All rights reserved. This article is protected by United States copyright and other intellectual property laws and may not be reproduced, rewritten, distributed, re-disseminated, transmitted, displayed, published or broadcast, directly or indirectly, in any medium without the prior written permission of Penton Media, Inc.