| CONTENTS
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Pending Code Change
Item for 2011 NEC
What's Wrong
Here?
Code Q&A
Code Quiz
Calling All Code
Writers
Electric West
2010
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Change Proposals
Pending Code Change Item for 2011
NEC
As noted in the NEC Committee Report on
Proposals, 2010 Annual Revision Cycle, Code-Making Panel 17 has
voted to accept a Code change submitted by Gary L. Siggins,
Underwriters
Laboratories, Inc. (Log #2357 NEC-P17). The recommendation calls for
revising the text of 680.2 as follows:
"Dry-Niche Luminaire. A luminaire intended for installation
in
the floor or wall of a pool, spa, or fountain in a niche
that is sealed against the entry of pool water."
As noted in the substantiation summary, this change will clarify
that
new luminaire designs can also be used in floor mounting applications
and in spas. This change also supports deletion of the word "pool" from
the summary text, as their application is now more widespread.
You can download
an electronic version of the report via the NFPA Web site.
Although the comment period is now closed, the results of the
committee action on all submitted comments will be published in the
NEC Committee Report on Comments, which will be made available
to
all who request it. The Report on Comments mail date is
scheduled
for March 29, 2010.
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Code Challenge
What's Wrong Here?
By Brian J. McPartland
Think you know how this installation violates the
NEC?
Visit EC&M's
Web site to see the answer.
Hint: Raceway-supported box
Code Q&A
By Mike Holt
Q. I recently saw a service disconnect that was
being used as a conduit for two feeder circuits. Is this legal?
Visit EC&M's Web
site to see the answer.
Code Quiz
By Steven Owen
A question has arisen related to the installation of a
new 112.5kVA dry-type transformer, which is equipped with ventilated
openings. The transformer will be located in an electrical equipment
room, directly across from a 480V switchboard. The rear of the
transformer will be pushed tight against a concrete wall. The distance
between the front of the transformer and the front of the switchboard
will be 48 in. Why was this proposed installation rejected by the
AHJ?
- It was turned down because a 112.5kVA dry-type transformer must be
installed in a vault or a room of fire-rated construction with a 3-hour
fire rating.
- It was turned down because the distance between the transformer and
the switchboard should have been 60 in.
- It was turned down because the transformer was pushed tight to the
concrete wall, which will reduce air flow needed to cool the
transformer, as required by the manufacturer and the NEC.
- The AHJ is wrong. There was no need to reject the installation as
it
is compliant with the requirements of the NEC.
Visit EC&M's
Web site for the answer and explanation.
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Code News Update
Calling All Code Writers
Don't miss an opportunity to help create the next
edition of NFPA 70E, Standard for Electrical Safety in the Workplace.
Time is running out! You have between now and Jan. 5, 2010 to submit
your proposals for new requirements, revisions to existing
requirements,
or deletion of existing requirements. But don't just fly by the seat of
your pants and submit a poorly worded submission without any technical
justification. It's important that you draft your proposal in a clear
and simple manner and back it up with technical justification. You must
convince the Code committee members that your change makes sense for
all
parties involved.
You can download
a proposal form directly from the NFPA Web site.
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Shows and Events
Electric West
2010
The Electric West Show, to be held March 16-18, 2009 at
the Las Vegas Convention Center, is the perfect place to brush up on
the
latest NEC topics — and earn continuing education credits in the
process. Geared toward electrical contractors, consulting & specifying
engineers, electricians, and plant facility personnel, the conference
program will offer the following NEC seminars, presented by industry
experts such as Mike Holt, Keith Lofland, and Edward Gorginian.
- Analysis of 2011 NEC Changes
- Understanding Important NEC Requirements
- Dwelling Calculations
- Advanced NEC Calculations
- Grounding vs. Bonding
- Swimming Pools and Similar Installations
For more information, visit our Web
site, or click here
to register.
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