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October 20, 2011
Vol. IX, No. 20


   EC&M's CodeWatch
  Today's Headlines
 What's Wrong Here?
 Moving Violations
 Code Q&A
 Code Quiz

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: Lack of continuity.

Caught by the inspector!

Check out our newest Moving Violations video.

In this episode, Joe addresses sloppy workmanship and identifies a clamp installed improperly.

Code Quandaries

Code Q&A

By Mike Holt

Q. When a metal water pipe is used as a grounding electrode, is the concrete encased electrode satisfactory as the supplemental electrode, or is a ground rod still required?

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

Code Challenge

Code Quiz

By Steven Owen

What are the requirements you must follow when grounding information technology equipment, where signal reference structures are installed?

  1. The signal reference structure(s) shall be bonded to an external ground ring with a maximum resistance-to-ground reading of 2 ohms.
  2. The signal reference structure(s) shall be bonded to any of the electrodes in the area of the information technology equipment (i.e., a structural metal member or metal water pipe system).
  3. The signal reference structure(s) shall be bonded to the equipment grounding conductor provided for the information technology equipment.
  4. There are no requirements for grounding or bonding in this situation.

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

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