| CONTENTS
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Article 100:
Definition of “Ground”
What's Wrong
Here?
Code Q&A
Code Quiz
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Top 2008 Code Changes
Article 100: Definition of
“Ground”
By Mike Holt
The NEC Grounding Task Group revised the definition for
“ground” as follows to improve the usability of the NEC.
“The earth or some conducting body that serves in place of the
earth.”
The revised definition is a good improvement because it provides a
simple description. Previous language, “some conducting body that
serves in place of the earth” was deleted, as the phrase left Code
users wondering what this really meant.
Coordinating changes were made throughout the NEC to reflect the new
definition.
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Code Challenge
What's Wrong Here?
By Joe Tedesco
Think you know how this installation violates the
NEC? Visit EC&M's
Web site to see the answer.
Hint: Overcrowding?
Code Q&A
By Mike Holt
Q. I was told that a back-fed breaker needs to be
bolted into the panel. Is this correct?
Visit EC&M's Web
site to see the answer.
Code Quiz
By Steven Owen
Q. What is the minimum cubic inch area required
for a terminal housing supplied with a generator? The conductors
installed within the terminal housing are as follows: four No. 6 AWG
THHW branch-circuit conductors and four No. 8 AWG MTW insulated
conductors.
- This calculation does not apply to a terminal housing supplied with
the generator.
- 20 cubic inches minimum. This applies only to the branch circuit
conductors.
- 12 cubic inches minimum
- 32 cubic inches minimum
Visit EC&M's
Web site for the answer and explanation.
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