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Some of you have completed our Online Continuing Education Courses which include video instruction and know this is a very fast way to obtain your CEU credits from the comfort of the chair you're sitting in. For the rest of you we are sending a weekly series of newsletters featuring an instructional page complete with videos.

To view the videos you will need to download the free Real Player Download Real Player plugin for your browser - if you don't already have it. After installing Real Player, you can view the videos by clicking on one of these icons:

  • Click on this icon Hi Res - Cable/DSL if you have a cable or DSL connection.
  • Click on this iconLow Res - Modem if you have a Dial-up connection.

Below is the full course page which includes these videos:


Article 600 Low Res - Modem Hi Res - Cable/DSL        Page 2 of 2
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600.21 Ballasts, Transformers, and Electronic Power Supplies

This subsection was revised to read:

(F) Suspended Ceilings. Ballasts, transformers, and electronic power supplies are permitted to be located above suspended ceilings, provided their enclosures are securely fastened in place and not dependent on the suspended ceiling grid for support. Ballasts, transformers, and electronic power supplies installed in suspended ceilings cannot be connected to the branch circuit by flexible cord. Figure 600–1

Intent: This change correlates with 400.8(2) and (5) which prohibit flexible cords within the space above a suspended ceiling.


Figure 600–1
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