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August 21, 2008 A Penton Media Publication Vol. VI No. 16

Overcurrent Device Location

What's Wrong Here?

Code Q&A

Code Quiz

Learn About the Changes in the 2008 National Electrical Code

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    Top 2008 Code Changes

    Overcurrent Device Location

    By Mike Holt
    A new subsection of 240.24 addresses the installation of overcurrent devices in stairways.

    "240.24(F) Not Located Over Steps. Overcurrent devices shall not be located over steps of a stairway."

    This change prohibits the installation of overcurrent devices over steps in stairways. Clearly, it's difficult for electricians to safely work on electrical equipment that is located on uneven surfaces such as stairways. However, said overcurrent devices can be located over landings adjacent to stairways.

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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: Float like a butterfly. Sting like a bee.

    Code Q&A
    By Mike Holt
    Q. What is the smallest size wire you can use for a lighting fixture whip?

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

    Code Quiz
    By Steven Owen
    Q. When bonding a swimming pool perimeter surface, where structural reinforcing steel is encapsulated in a nonconductive compound, the following conditions apply:

    • the conductor shall follow the contour of the perimeter surface
    • only listed splices shall be permitted
    • the required conductor shall be 18 to 24 inches from the inside walls of the pool
    • the required conductor shall be secured within or under the perimeter surface (4 to 6 inches) below the subgrade, and
    • the minimum conductor size and type shall be _____________.
    1. minimum 8 AWG, tinned, stranded copper
    2. minimum 8 AWG, bare, solid copper
    3. minimum 8 AWG, covered, stranded copper
    4. minimum 6 AWG, solid copper

    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

    Cool Electronic Cabinets
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