March 13, 2006 A Prism Business Media Publication Vol. IV No. 5

The Hollow Ground Connection

What's Wrong Here?

Code Q&A

Code Quiz

NFPA 70E Standard: Speak Now, or Forever Hold Your Complaints

NEC Sessions Scheduled for 2006 NFPA World Safety Conference & Exposition

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    Nightmare Installations
    The Hollow Ground Connection
    I was called to perform some work in an area containing a small building and six tennis courts, which were scheduled for demolition. The feeder conductor was 3/0 copper, and it was connected to a 200A breaker in a separate building. After disconnecting the feeder to the subpanel, I saw what looked like a No. 4 ground wire connected to a ground rod. I grabbed my intermediate size cutters and was surprised at how easy it was to snip it. I then took a closer look at the "acorn" on the ground rod and the connection at the ground bar and noticed that the ends of this "wire" were flattened. The original installer had used a piece of 1/8-inch copper water tubing for the connection!
    Mike Walker
    Columbus, Ohio

    Achieve Your
    Performance Goals

    Anticipate, prevent and troubleshoot motors, electrical and equipment maintenance with fast, accurate non-contact temperature measurements with Fluke infrared thermometers.

    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: Is this a new type of splice box?

    Code Q&A
    By Mike Holt
    Q. Can we install coaxial cables inside the duct work of an existing building?

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

    Code Quiz
    By Steven Owen
    Q. The installation of fire alarm circuits (Art. 760), communication circuits (Art. 800), CATV and radio distribution systems (Art. 820), and network powered broadband communication systems (Art. 830) installed in the hollow space above a suspended ceiling does not require secure support independent of the existing wires used to support the ceiling for which of the following?
    A) fire alarm systems
    B) communication systems
    C) community antenna television systems / radio distribution systems
    D) network powered broadband communication systems (voice and data)

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

    10 Steps of an Effective Arc Flash Hazard Safety Program from ESA
    Developing and implementing an arc flash hazard program that meets the requirements of IEEE 1584, NFPA 70E, and OSHA Standard 29 is challenging. Meeting these requirements on a constrained budget and with limited manpower assets requires proper planning and execution. Our informative guide, "10 Steps of An Effective Arc Flash Hazard Safety Program," is the perfect resource to help you get started.
    Offer code: WA0517

    Code News Update
    NFPA 70E Standard: Speak Now,
    or Forever Hold Your Complaints

    In accordance with the Regulations Governing Committee Projects, the NFPA committee for the Standard for Electrical Safety in the Workplace (NFPA 70E-2004) is now accepting proposals for recommendations on content. So if you've got a beef with the current wording in this document, or feel some additional information needs to be added, then speak up now and let your voice be heard. The committee will act on proposals received by 5 p.m. ET on Sept. 15, 2006, and that action will be published in the committee's report. All proposals must be submitted to Codes and Standards Administration on proposal forms available in the back of all NFPA documents or from NFPA headquarters.

    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.

    Shows and Events
    NEC Sessions Scheduled for 2006 NFPA World Safety Conference & Exposition
    The 12 sessions that make up the necforum are designed to help you consider new electrical design issues, analyze maintenance programs, review best practices in the electrical contracting arena, learn effective inspection techniques, and implement practical safety programs. If these topics interest you, then make plans to fly to Orlando in early June and take part in this year's event, which will be held from June 2-8, 2006. Visit the NFPA World Safety Web site for additional details.

    Connected & Protected
    IDEAL's new WeatherProof™ Wire Connectors are the fastest, easiest and safest way to connect wires in damp or wet locations. Pre-filled with a silicone-based sealant and UL listed to 486D, these connectors protect conductors from moisture, humidity and other corrosive elements. Visit to request a free sample.

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