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April 14, 2009 A Penton Media Publication Vol. V No. 7



CONTENTS
Cast Your Vote for the EC&M Product of the Year!

Cable Testing Programs

Electrical Troubleshooting Quiz

Bottleneck Motor Repairs, Part 7

NEC in the Facility

Safety


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

MRO Insider addresses topics such as:

  • Working with management and supervision
  • National Electrical Code® on the production floor
  • Safety procedures and programs
  • Troubleshooting techniques
  • Equipment maintenance and testing tips
  • Managing motors and generators
  • Trends in training and education
  • Managing energy use


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

     
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    Product of the Year Competition
    Cast Your Vote for the EC&M Product of the Year!
    Would you like to help pick the prestigious EC&M Product of the Year winner and qualify for a chance to win $100? If you’re an EC&M subscriber, make your vote count by visiting the 2009 EC&M Product of the Year Poll. To review the products, click on the links for each of the 29 category winners to read a brief description and view a photo. Once you're finished with your review, enter your contact information, choose your favorite product from the dropdown menu, and click submit.

    Your selection will help us identify the 2009 EC&M Product of the Year Platinum, Gold, and Silver award winners. As an added incentive, three lucky voters will be randomly selected to receive a $100 gift check.

    The voting poll will remain open through 5 p.m. on June 19, 2009. Only one vote per EC&M subscriber, please. Any votes received from manufacturers, PR firms, or non-EC&M readers will be discarded.


    Maintenance
    Cable Testing Programs
    A good cable testing program has many benefits. It can help you reduce energy losses, prevent unplanned production shutdowns, and avert catastrophic failures. We asked Ron Widup of Shermco Industries, an electrical services company based in Irving, Texas, for some insight on cable testing.

    To read Widup's tips, visit EC&M's Web site.


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    Repair
    Electrical Troubleshooting Quiz
    Occasionally, a drive motor speeds up and slows down with no change of control input. But the production process depends on exact speed, and this problem is causing excess scrap rates. What steps should you take to troubleshoot this?

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


    Bottleneck Motor Repairs, Part 7
    Are repair techs actually using your procedures for the repair of critical equipment (e.g., bottleneck motors)? If not, try using those procedures yourself in a mockup repair situation to see why.

    Don’t let your written procedures provide a torturous path for returning the equipment to service. Look for these deficiencies:

    To read more on this story, visit EC&M's Web site.


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    Operation
    NEC in the Facility
    Intrinsically safe installations lose that status if you don’t separate intrinsically safe conductors from nonintrinsically safe conductors [504.30(A)]. This concept of conductor separation is the major thrust of Art. 504. About half of the Article consists of the details of achieving this separation. Caution: Don’t separate the equipment grounding (bonding) conductors from those of nonintrinsically safe systems, because that would cause a difference of potential.


    Safety
    Do you know who has access to maintenance department equipment? It might seem fine to let Joe from ACME Electric use your conduit bender. After all, your company has a long and beneficial relationship with ACME.

    But what if another contractor assumes your company has an open use policy? Carl’s never seen a conduit bender before and thinks it’s perfect for bending pieces of rebar. Joe’s been running EMT and the bender is set up for this thin tubing. Carl bends a length of rebar and walks off. Joe comes by a few minutes later to bend a stick of EMT and is injured when the cracked shoe shatters.

    To read more on this story, visit EC&M's Web site.


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