Pending Code Change
Item for 2011 NEC
Comments Sought on
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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 4 has
to accept a Code change submitted by Lanny G. McMahill of Phoenix. (Log
#454 NEC-P04). The recommendation calls for adding a new exception to
230.24(A), which reads as follows:
"Exception No. 5: Where the voltage between conductors does not
exceed 300 and the roof area is guarded or isolated, a reduction in
clearance to 900 mm (3 ft) shall be permitted."
As noted in the substantiation summary, this new exception will
correlate with allowances in the National Electrical Safety Code
McMahill points out that there is currently a minor conflict with the
exceptions in the NEC and the NESC. This change will better correlate
the two documents.
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.
Imagine the possibilities.
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What's Wrong Here?
By Brian J. McPartland
Think you know how this installation violates the
Web site to see the answer.
Hint: Think clearances
By Mike Holt
Q. What are the bonding requirements for
Visit EC&M's Web
site to see the answer.
By Steven Owen
Fill in the blank
When installing disconnecting means for multi-wire branch circuits
temporary installations, the disconnecting means must disconnect all
ungrounded conductors at the power outlet or panelboard where the
circuit originates. The power outlet may be __________.
- an enclosed assembly that may include circuit breakers
- an enclosed assembly that may include fuseholders
- an enclosed assembly that may include fused switches
- all of the above
Web site for the answer and explanation.
Have a UL White Book but not sure how to use
Discover why the UL White Book is Part 2 of the NEC and
how it will help you avoid "Red Tagged" jobs. Click here to learn how to
use the White Book FREE online or to order a copy.
Code News Update
Comments Sought on Proposed
The following Tentative Interim Amendment (TIA) has
issued by the NFPA.
NFPA 70E-2009, Standard for Electrical Safety in the
TIA Log No. 981
Reference: 130.3, Exception No. 1
Submitter: Daleep Mohla, DCM Electrical Consulting Services, Inc.
1. Delete Exception No. 1 to Section 130.3, Arc Flash Hazard
Analysis, which presently reads as follows:
Exception No. 1: An arc flash hazard analysis shall not be
required where all of the following conditions exist:
(1) The circuit is rated 240 volts or less.
(2) The circuit is supplied by one transformer.
(3) The transformer supplying the circuit is rated less than
2. Renumber Exception No. 2 as Exception.
To review the submitter's reason substantiation and emergency nature
text for this change, click
This TIA has been published for public review and comment. Comments
should be filed with the Secretary, Standards Council by February 1,
2010. 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 March 2-3,
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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
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.
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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