Item for 2011 NEC
Louisiana One Step
Closer to Adoption of 2008 NEC
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The designations "National Electrical Code" and "NEC" refer to the
National Electrical Code®, which is a registered
trademark of the National Fire Protection Association.
Pending Code Change Item for 2011
As noted in the NEC Committee Report on
Proposals, 2010 Annual Revision Cycle, Code-Making Panel 6 has
to accept a Code change proposal generated by the NFPA/CSA NEC/CEC
Ampacity Harmonization Task Group and submitted by representative James
M. Daly (Log #635 NEC-P06). The recommendation calls for revising the
first column heading in Table 310.15(B)(2)(a) from "Number of
Current-Carrying Conductors" to "Number of Conductors (See Note 1)" and
adding a note below the table before FPN No. 1 to read: "Number of
Conductors is the total number of conductors in the raceway or cable
adjusted in accordance with 310.15(B)(4) and (5)."
As noted in the substantiation summary, this Table was originally
added to the Code in 1940, and the column heading remained as "Number
Conductors" until 1993. During the 1993 NEC revision cycle, the column
headings in Table 310.15(B)(2)(a) and Table B.310.11 were editorially
changed to "Number of Current-Carrying Conductors." However, there was
no Proposal, Comment, or Panel Action to make the change. This
reinstatement of the original column heading permits the user to take
the total number of conductors in the cable or raceway and subtract the
neutral conductors not required to be counted under 310.15(B)(4) and
grounding or bonding conductors not required to be counted under
310.15(B)(5). The result is the number of conductors that may be
simultaneously energized — this number would be used to select the
adjustment factor from the Table. The correction to the column heading
also correlates with the column headings in Table 400.5 in the NEC and
Table 5C in the 2006 Canadian Electrical Code, Part I.
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
all who request it. The Report on Comments mail date is
for March 29, 2010.
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What's Wrong Here?
By Brian J. McPartland
Think you know how this installation violates the
NEC? Visit EC&M's
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Hint: Fixtures permitted in clothes closets
By Mike Holt
Q. When are tamper-resistant receptacles
Visit EC&M's Web
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By Steven Owen
In single-family and multi-family dwellings, what are
the minimum and maximum lengths permitted for the grounding conductor
network-powered broadband communications systems network interface
that contain protectors? Ignore any possible exceptions noted.
- Minimum — as short as practicable / maximum — 20 ft
- Minimum — 2.5 ft / maximum — 6 ft
- Minimum — 4 ft / maximum — 10 ft
- Minimum — as short as practicable / maximum — 6
Web site for the answer and explanation.
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Code News Update
Louisiana One Step Closer to Adoption
of 2008 NEC
According to a recent Code Alert issued on October 30,
2009 by the National Electrical Manufacturers Association (NEMA), an
administrator for the Louisiana State Uniform Construction Code Council
(LSUCCC) recently announced the official implementation date for the
2008 NEC in the state of Louisiana is Jan. 1, 2010. The LSUCCC
originally adopted the 2008 NEC without amendment on April 14, 2009.
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Shows and Events
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
latest NEC topics — and earn continuing education credits in the
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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.
For more information, visit our Web
site, or click here
- Analysis of 2011 NEC Changes
- Understanding Important NEC Requirements
- Dwelling Calculations
- Advanced NEC Calculations
- Grounding vs. Bonding
- Swimming Pools and Similar Installations
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