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October 8, 2009 A Penton Media Publication Vol. VII No. 19

Pending Code Change Item for 2011 NEC

What's Wrong Here?

Code Q&A

Code Quiz

2008 Michigan Electrical Code

2008 NEC Adoption Process Update in Florida

State Electrical Regulations


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    Change Proposals
    Pending Code Change Item for 2011 NEC
    As noted in the NEC Committee Report on Proposals, 2010 Annual Revision Cycle, Code-Making Panel 8 has voted to accept a Code change submitted by David A. Williams, Delta Township, (Log #3622 NEC-P08). Williams recommended adding a second sentence to 392.7(A) that would read as follows: "Metal cable tray containing non-power conductors (communication, data, signal, etc.) shall be electrically continuous, through listed connections or the use of an insulated stranded bonding jumper not smaller than a 10 AWG." He notes, "The NEC presently does not require cable trays with non-power conductors to be properly bonded. The NECA/NEMA 105-2007 Standard for Installing Metal Cable Tray Systems provides bonding requirements in Section for installations of only non-power conductors. This needs to be covered in the NEC." He adds, "Most contractors do not have access to the NEIS standards."

    The document is open for public review and comment through October 23, 2009. You can download an electronic version of the report via the NFPA Web site.

    All interested parties are urged to read this report and submit their comments on the forms provided in the report. Each comment received on or before the closing date of the comment period will be considered and acted upon by the NEC Code Committee. The results of the committee action will be published in the NEC Committee Report on Comments, which will be made available to all who request it. The Report on Comments mail date is scheduled for March 29, 2010.

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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 Web site to see the answer.

    Hint: Wiring methods permitted with plastic boxes

    Code Q&A
    By Mike Holt
    Q. We do a lot of generators for residences, and only recently have been getting written up on our transfer switches. The inspectors are saying that if I use the transfer switch to transfer the entire house — and I put it between the meter and the service disconnect — then the transfer switch must be "service rated." Can you help me understand the rules, please?

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

    Code Quiz
    By Steven Owen
    A question has arisen related to whether a storage battery installation has the required working space in accordance with the 2008 National Electrical Code. The depth of the battery rack supporting the batteries is 12 in. It's installed tight against a concrete wall. Directly across from the battery rack is electrical switchgear rated at 600V, with a nominal operating voltage of 480V.

    Based on these facts, what is the required minimum depth of the working space in the direction of live parts?

    1. 36 in. from the back edge of the battery rack to the front edge of the electrical switchgear.
    2. 42 in. from the front edge of the battery rack to the front edge of the electrical switchgear.
    3. 48 in. from the front edge of the battery rack to the terminals inside of the electrical switchgear.
    4. 48 in. from the front edge of the battery rack to the front edge of the electrical switchgear.

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

    Avoid Safety Violations
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    Code News Update
    2008 Michigan Electrical Code
    The 2008 Michigan Electrical Code will take effect on Dec. 2, 2009. The new Code is based on the 2008 National Electrical Code, with some additions, deletions, and amendments. The changes to the 2008 NEC are outlined in this PDF, which is posted on the Michigan Department of Energy, Labor & Economic Growth Web site.

    2008 NEC Adoption Process Update in Florida
    According to a recent Code Alert issued on Sept. 28, 2009 by the National Electrical Manufacturers Association (NEMA), the state of Florida began implementation of the 2008 NEC on Oct. 1, 2009, with one amendment to safety. As noted in an amendment to Chapter 27 of the 2007 Florida Building Code, Section 2705 will now read as follows:

    Section 2705 Equipotential Bonding GFCI Protection

    2705.1 NFPA 70 - 08: National Electric Code, Article 680 (Swimming Pools, Fountains, and Similar Installation), Section 680.22(B), GFCI Protection, is amended to read as follows:

    (B) GFCI Protection. Outlets supplying pool pump motors from branch circuits with short circuit and ground-fault protection rated 15A or 20A, 125V or 240V, single-phase, whether by receptacle or direct connection, shall be provided with ground-fault circuit interrupter protection for personnel.

    Exception: One- and two-family dwellings.

    Click here to read NEMA's analysis on how this change came about.

    PowerTest 2010, February 15-18, 2010 in Long Beach, CA
    The InterNational Electrical Testing Association (NETA) will host the 2010 PowerTest Electrical Maintenance and Safety Conference February 15-18 at the Hyatt Regency in Long Beach, CA. Highlights include: Safety, Equipment, Reliability, Renewable Energy, and IAEI paper tracks, NERC/FERC symposium, three panels, seminars, and an outstanding tradeshow. For more information visit

    Electrical Resources
    State Electrical Regulations
    Looking for a guide to state electrical codes, enforcement agencies, and contractor/electrician licensing requirements? Then check out the State Codes and Licenses page on the NECA Web site. This reference can come in handy when venturing out into a new geographic work area or taking up residence in a new state. But that's not all. The site also offers detailed information on low-voltage licensing requirements and contact information for enforcement agencies overseeing the installation of these types of systems (i.e., fire alarm and security).

    Why do you need the 2009 UL White Book? For electrical product information you can design around for Code compliant installations. To reduce red tags on jobs. To pick a Code Section and find the right product for the right installation. Download the 2009 UL White Book now!

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