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August 4, 2011
Vol. IX, No. 15


   EC&M's CodeWatch
  Today's Headlines
 Release of 2012 NESC
 State of Maine Now Referencing 2011 NEC
 What's Wrong Here?
 Code Q&A
 Code Quiz

Code News Update

A new version of the "other" national electrical code hit the streets this week. On Monday, the IEEE announced availability of the 2012 edition of the National Electrical Safety Code (NESC).

According to a press release issued by the IEEE, the scope, application, and definition rules of the document were extensively revised to help clarify when and where the NESC or NEC applies. In addition, grounding rules were added to help achieve effective grounding connections in new installations. New work rules added options for determining appropriate arc ratings for apparel to be worn while working on energized lines. Revisions were also made to the minimum approach distances (MADs) to meet the requirements of IEEE 516-2009.

Full details of the revisions made in the 2012 edition can be found at the IEEE Standards Association (IEEE-SA) NESC web page.

On July 13, 2011, the governor of Maine signed legislation that updates the Electric Installation Standards used by the state. Installation standards now reference the 2011 edition of the National Electrical Code. The 2011 NEC, with amendments, became effective on July 19.

According to a recent Code Alert issued on July 19 by the National Electrical Manufacturers Association (NEMA), the previous version of the electrical standard (based on the 2008 NEC) had 18 amendments. Many of these amendments were deleted with this change as they are now covered by revisions made in the 2011 edition of the NEC. However, six technical amendments were retained. They relate to the following sections of the Code: 210.5(C), 215.12(C), 334.10(3), 334.12(A)(2), 338.12(B)(1) and (2), and 702.4.

Visit the NEMA website for a more detailed review of this adoption news.

Code Violations

What's Wrong Here?

By Joe Tedesco

Think you know how this installation violates the NEC?

Visit EC&M's website to see the answer.

Hint: An accident waiting to happen

Code Quandaries

Code Q&A

By Mike Holt

Q. Is it acceptable to install communication cable in the same lighting pole that is being used as a raceway for lighting conductors?

Visit EC&M's website to see the answer.

Code Challenge

Code Quiz

By Steven Owen

When installing a messenger-supported wire, which of the following cable types are permitted to be installed?

  1. MV, MC, and MI cables.
  2. Multiconductor service entrance cable, which may use the messenger as a grounded conductor, as well as multiconductor underground feeder and branch circuit cable.
  3. Power and control tray cable, and power-limited tray cable.
  4. Other factory-assembled, mulitconductor control, signal, and power cables identified for the use.
  5. All of the above.

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

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