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Learn About the
Changes in the 2008 National Electrical Code
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EC&M Product of the Year Competition
Do you want the opportunity to win a $100 gift check?
you’re an EC&M subscriber, we invite you to help us select
year’s Product of the Year winner. The deadline for voting is June
2008. To make your voice heard, visit the EC&M Home page anytime before now and
then. Click on “vote now and become eligible for a $100 gift
located in the center of the page. You can click on a link for each of
the 24 category winners to read a brief description of the product
features and view a photo. Once you’re finished with your review, you
can click on the "vote here for your favorite" link, which allows you
enter in your contact information, choose your favorite product, and
click submit. As an added incentive to capture your vote, five lucky
voters will be randomly selected to receive one of five $100 gift
― so don’t delay. Vote today!
The competition has honored innovation and excellence in product
development in the electrical industry for the past seven years.
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
Top 50 NEC Rules
By Mike Holt
The rule on “simultaneous disconnecting means”
requirements for multiwire branch circuits was expanded. Section
210.4(B) reads as follows: “Each multiwire branch circuit shall have
means to simultaneously disconnect all ungrounded conductors at the
point where the branch circuit originates.”
Multiwire branch circuits can offer unexpected shock hazards when
work is being done on them ― unless all ungrounded conductors from
multiwire branch circuit are disconnected simultaneously. This revised
section requires each ungrounded conductor of a multiwire branch
to be disconnected simultaneously by common trip 2-pole or 3-pole
circuit breakers or single-pole circuit breakers with an identified
handle tie. Individual single-pole circuit breakers with handle ties
identified for the purpose, or a breaker with a common internal trip,
can be used for this application [240.15(B)(1)].
Caution: This rule is intended to prevent people from working
on energized circuits they believe are disconnected.
Streamline the implementation of your Arc Flash and
Electrical Safety Program; what used to take days, now takes mere
seconds! Watch EasyPower in action through our online videos http://www.easypower.com/videos.php
Experience the most accurate Windows®-based tools for
analyzing, and monitoring electrical power systems: EasyPower
training will be in Portland, Oregon July 28 – August 1,
2008. This seminar fills up quickly; download a brochure
register by July 14th! http://www.easypower.com/support_training.php
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: No, those are not pool pump hoses.
By Mike Holt
Q. I have a building that has two services from
the utility. Do I have to use the same grounding system for both?
Visit EC&M's Web
site to see the answer.
Q. Which of the following wiring methods is the
only one permitted to be installed under the roof decking in an
industrial building without a minimum 1½-inch spacing from the bottom
edge of the roof decking?
- Metal clad (MC) cable
- Electrical metallic tubing (EMT)
- Rigid nonmetallic conduit (RNC)
- Rigid metallic conduit (RMC)
Web site for the answer and explanation.
Cool Electronic Cabinets
Beat the summer time heat and prevent hot weather failures. UL Listed
Cabinet Coolers from EXAIR produce 20 degree Fahrenheit air from an
ordinary supply of compressed air to cool electrical controls.
Thermostat control minimizes air usage. Maintains the NEMA 4, 4X
(stainless steel) and 12 rating of the enclosure. Web site offers
detailed information, downloadable drawings and PDF literature.
Code News Update
Comments Sought on Proposed
As published in the May issue of NFPA News, the
following Tentative Interim Amendment (TIA) has been proposed to the
NFPA 70-2008, National Electrical Code
TIA Log No. 925
Submitter: William Burke, American Power Conversion
Revise 645.17 as follows: “645.17 Power Distribution Units.
Power distribution units that are used for information technology
equipment shall be permitted to have multiple panelboards within a
single cabinet, provide that
each panelboard has no more than 42
overcurrent devices and the power distribution unit is utilization
equipment listed for information technology application.”
Substantiation: This is a resubmitted version of TIA 904 that
was recently processed through the NFPA system. TIA 904 sought to
the entire text of 645.17. It was suggested during the processing of
904 that a more appropriate action [suggested by Mr. Quave (CMP 12),
Kovacik (TCC), Mr. Daly (TCC), and Mr. Troglia (TCC)] for the TIA would
be to only delete the text associated with the 42 circuit limitation on
the panelboards. That is what this TIA proposes.
TIA 904 did pass CMP 12 on both Technical Merit and Emergency
It did not pass the TCC on Technical Merit by a single vote and did not
pass on Emergency Nature by three votes. This revision will address a
number of the comments made during the processing of TIA 904 and
addresses those concerns in a manner that should make the TIA
This TIA has been published for public review and comment. Comments
should be filed with the Secretary, Standards Council by May 2, 2008.
You should identify the TIA number when submitting your comments. The
Standards Council will review the technical committees’ ballot
results, the public comments, and any other information that has been
submitted when it considers the issuance of the TIA at its July 22-24,
It takes more than the UL Mark on a product to satisfy code
requirements. Before your next installation, use UL's Code Compliance
Database to identify the correlation between model codes and UL
Certified products, as well as find manufacturers of certified
Click here today to
find up-to-date UL Listed products at the UL Code Correlation Database.
Shows and Events
Learn About the Changes in the 2008 National Electrical Code
In two informative and interest-filled days with Mike Holt,
you'll learn about major NEC changes that will impact your work,
you're an electrician, contractor, engineer, designer, or
maintenance person. You'll also earn continuing education hours and
professional development hours.
Two conferences are scheduled for later this year:
--September 4-5 in Portland, Ore.
--September 8-9 in San Antonio
For more information and to register online, go to http://CodeChangeConferences.com
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