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May 19, 2011
Vol. IX, No. 10


   EC&M's CodeWatch
  Today's Headlines
 Vote for the 2011 Product of the Year and Qualify for a Chance to Win $100!
 What's Wrong Here?
 Code Q&A
 Code Quiz

Important Notice

Your vote will help us identify the 2011 Platinum, Gold, and Silver Product of the Year award winners. EC&M subscribers, simply review the products from the 2011 EC&M Product of the Year category winners list, and then choose your favorite from the drop-down menu. Three lucky voters will be randomly selected to receive $100.

The voting poll will remain open through 5 p.m. on May 20. Please, only one vote per EC&M subscriber. Any votes received from manufacturers, PR firms, or non-EC&M subscribers will not be counted.

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: These "wire capsules" are not available for purchase.

Code Quandaries

Code Q&A

By Mike Holt

Q. When can power distribution blocks be installed in junction boxes?

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

Code Challenge

Code Quiz

By Steven Owen

When installing feed-through conductors in switch and overcurrent device enclosures, what new requirement was added in the 2011 edition of the NEC?

  1. A warning label shall be applied to the enclosure that identifies the closest disconnecting means for any feed-through conductors.
  2. The total area of all conductors, splices, and taps installed at any cross section of the wiring space must not exceed 75% of the cross-sectional area of that space.
  3. The total area of all conductors installed at any cross section of the wiring space must not exceed 40% of the cross-sectional area of that space.
  4. Feed-through conductors of any circuit are not allowed to be placed in any switch or overcurrent device enclosure.

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

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Understanding NEC Requirements for Solar Photovoltaic Systems
EC&M partnered with NEC expert Mike Holt to present a one-hour webinar covering the most important Code requirments for solar PV systems. This event is now available on demand here via the EC&M website.

Avoid Safety Violations
A dangerous shock hazard exists when electronics operate with the panel door open. Avoid the danger and OSHA fines. EXAIR’s low cost Cabinet Cooler® Systems are CE compliant and stop electronic control downtime with cold 20 degree Fahrenheit air and maintain the NEMA 4, 4X and 12 rating of the enclosure. Web site offers detailed information, video.


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