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May 7, 2009 A Penton Media Publication Vol. VII No. 9

Comments Sought on Proposed TIA

What's Wrong Here?

Code Q&A

Code Quiz

Enroll In EC&M University's Online Arc Flash Courses


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    Code News Update
    Comments Sought on Proposed TIA
    As published in the May issue of NFPA News, the following Tentative Interim Amendment (TIA) has been proposed to the NFPA.

    NFPA 30A-2008, Code for Motor Fuel Dispensing Facilities and Repair Garages
    TIA Log No. 956
    Reference: Table 8.3.1
    Submitter: Marshall A. Klein, Marshall A. Klein & Associates, Inc.

    Action: Revise Table 8.3.1 on pages 2-4.

    Submitter's substantiation: Extend the utility of this table by incorporating the European Zone system of designating hazardous (classified) locations and noting the wiring methods and electrical utilization devices that can be used in them. This should be done quickly so that the revised table can be proposed for incorporation into the 2011 edition of the NEC.

    Technical validity: The Technical Committee on Automotive and Marine Service Stations has revised the table to show the proper Zone designations. These new Zone designations correlate with NEC Art. 505. The reorganized and simplified table also features several new footnotes and highlights relationships to NEC Articles 511 and 514.

    To review the "Emergency Nature" text and view the Revised Table 8.3.1 for this proposed TIA, click here and review the text on pages 1 through 5.

    This TIA has been published for public review and comment. Comments should be filed with the Secretary, Standards Council by June 12, 2009. No form is required, but your comments should be submitted on company letterhead. Please identify the TIA number when submitting your comments. The Standards Council will review the technical committees' ballot results, the public comments, and any other information that has been submitted when it considers the issuance of the TIA at its August 4-6, 2009 meeting.


    Have a UL White Book but not sure how to use it?Discover why the UL White Book is Part 2 of the NEC and how it will help you avoid "Red Tagged" jobs. Click here to learn how to use the White Book online FREE (or to order a copy).

    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: A real tap dancer

    Code Q&A
    By Mike Holt
    Q. We are being told that we can't use PVC conduit underground to provide power to the gasoline pumps we are wiring. Is this true?

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

    Code Quiz
    By Steven Owen
    With respect to hazardous (classified) locations, including Class I Group Classifications -- only one group has a single chemical listed. This chemical can be very challenging to handle, as it has a minimum igniting current (MIC) ratio of 0.28 and a minimum igniting energy (MIE) of 0.017 mJ. Can you name the group letter designation and chemical?

    1. Group A, Acetylene
    2. Group B, Hydrogen
    3. Group C, Hydrogen Sulfide
    4. Group D, Pentane

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

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

    Shows and Events
    Enroll In EC&M University's Online Arc Flash Courses
    Need Arc Flash prevention training and continuing education, but don't have a travel budget? That's no problem. EC&M University's e-Training Center is the answer! Just link to these live, online training courses directly from your computer. Each course will be presented in a concise and easy-to-understand manner by an industry acknowledged expert.
    • Mitigation of Arc Flash Hazards Using Fuses
      May 12, 2009
    • Arc Flash Testing Updates
      June 16, 2009
    • Arc Flash Hazard Mitigation Case Studies
      June 25, 2009
    For more information, go to To register online, go to

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