Definition of “Ground”
About this Newsletter
e-newsletter is brought to you from the
publisher of EC&M magazine.
Let you know what could be changing in the Code®.
Help you brush up on your ability to apply the Code®.
Test your knowledge of the Code® with a Q&A format.
Provide information on upcoming Code® seminars and shows.
Give you an opportunity to sound off on Code®-related issues.
We want to make sure we're providing you with the content you need to
better manage your business or enhance your technical skills. E-mail us and let us know
what you want to see in future issues of this e-newsletter. We will do
our best to address your request in a future issue of CodeWatch.
To unsubscribe from this newsletter go to: Unsubscribe|
To subscribe to this newsletter, go to: Subscribe
To get this newsletter in a different format (Text or HTML),
or to change your e-mail address, please visit your profile
page to change your delivery preferences.
issue? Visit the
CodeWatch archive on EC&M's Web site.|
Tell a friend about CodeWatch
Do you know
of someone who'd like to receive CodeWatch? Visit the subscriber site, enter
their e-mail address and spread the wealth!|
To find out
how to advertise in this newsletter, e-mail David Miller or call him at
The designations "National Electrical Code and NEC refer to the
National Electrical Code®, which is a registered trademark of the
National Fire Protection Association.
Top 2008 Code Changes
Article 100: Definition of
By Mike Holt
The NEC Grounding Task Group revised the definition for
“ground” as follows to improve the usability of the NEC.
or some conducting body that serves in place of the
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
The Fluke 1735 Power Logger is the ideal electrician or technician's
power meter for conducting energy studies and basic power quality
logging. Set the Power Logger up in seconds with the included flexible
current probes and color display. The power quality meter measures most
electrical power parameters, harmonics, and captures voltage events. www.fluke.com/codewatch
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.
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.
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
- This calculation does not apply to a terminal housing supplied with
- 20 cubic inches minimum. This applies only to the branch circuit
- 12 cubic inches minimum
- 32 cubic inches minimum
Web site for the answer and explanation.
Registration Closes April 21, 2008! Streamline
the implementation of your Arc Flash and Electrical Safety Program; what
used to take days, now takes mere seconds! EasyPower delivers the
easiest-to-use, most accurate Windows® -based tools for designing,
analyzing, and monitoring electrical power systems. See for yourself:
EasyPower training will be in Cincinnati, Ohio May 5 - 9, 2008. Download a brochure
and register by April 21st!
Shows and Events
Don't Miss This Important And Informative Webinar!
April 24th, 2:00PM Eastern, 11:00AM Pacific: Arc Flash Hazard -
Can HRG Technology Play a Role in Prevention? presented by
Sergio Panetta, vice president of Engineering, i-Gard.
This webinar will provide a short summary of solidly-grounded and
high resistance grounding (HRG) systems, with particular emphasis on the
prevalence of the solidly-grounded system and the inherent arc flash
hazard associated with this option. It will also provide information as
to the root causes of arc flash hazard and then discuss the following
statement on HRG from the IEEE Std 141-1993 (Red Book):
"7.2.2 There is no arc flash hazard (with high resistance
grounding systems), as there is with solidly grounded systems, since the
fault current is limited to approximately 5A."
Finally, the webinar will provide the rationale and technical
understanding of how HRG technology can mitigate and reduce the arc
flash hazard as well as important design considerations when specifying
and installing an HRG system. For more information, click
Cool Electronic Cabinets
Summer will be here soon! Prevent hot weather failures. EXAIR's compact
Cabinet Coolers are the low cost way to purge and cool electronic
controls with 20 degree Fahrenheit air. All models are UL Listed and
maintain the NEMA 4, 4X or 12 rating of the enclosure. Many cooling
capacities are available. Web site offers detailed information,
downloadable drawings and PDF literature. EXAIR Corporation
You are subscribed to this newsletter as #email#
For questions concerning delivery of this newsletter, please contact our
Customer Service Department at:
Customer Service Department
A Penton Media publication
US Toll Free: 866-505-7173
Penton | 1166 Avenue of the Americas, 10th Floor | New York, NY 10036
Copyright 2014, Penton. All rights reserved. This article is
protected by United States copyright and other intellectual property
laws and may not be reproduced, rewritten, distributed, re-disseminated,
displayed, published or broadcast, directly or indirectly, in any medium
without the prior written permission of Penton Media, Inc.