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Marne and
Associates NESC and OSHA Newsletter addresses
issues relevant to power and communication
utilities.
In This
Issue:
2012 NESC Proposed
Change:
"K" Factor (additive
constant)
The change proposals for the 2012 NESC have
been published to gather industry comments.
Comments are due by May 1, 2010.
Change proposal CP3454 applies to two NESC
rules, NESC Rule 230B (in the clearance section)
and NESC Rule 251B (in the loadings section).
Both rules contain values for an additive
constant which is commonly referred to as a "K"
factor. The change proposal involves deleting
the additive constant and using a greater wind
pressure. For example, for the Medium Loading
District (Clearance Zone 2) instead of 15°F,
0.25 in of ice, 4 lb/ft² of wind, and an
additive constant of 0.20 lb/ft, the constant of
0.20 lb/ft would be deleted and the wind would
increase to 8 lb/ft².
Industry comment is needed to review this
proposed change. To get your voice heard, the
first step is to purchase the Preprint Proposals
for the 2012 Edition of the NESC (unfortunately
this document is not available for free). The
second step is to follow the electronic revision
process to submit your comments to the Code
committees.
To order a copy of the Preprint Proposals
for the 2012 Edition of the NESC click
here. We only have two (2) left in
stock!
2012 NESC Proposed
Change:
60'
Extreme Wind Exemption
The change
proposals for the 2012 NESC have been published
to gather industry comments. Comments are due by
May 1, 2010.
Change
proposal CP3423 applies to NESC Rules 250C
(extreme wind loading) and 250D (extreme ice
with concurrent wind loading) which contain an
exclusion for structures or supported facilities
less than 60 feet above ground or water level.
The change proposal is to eliminate the 60
ft exclusion (therefore requiring all poles to
meet extreme wind and extreme ice with
concurrent wind loading). This change proposal
was rejected but continues to be a source of
controversy.
Industry
comment is needed to review this proposed change
(in this case, rejection of the proposed
change). To get your voice heard, the first step
is to purchase the Preprint Proposals for the
2012 Edition of the NESC (unfortunately this
document is not available for free). The second
step is to follow the electronic revision
process to submit your comments to the Code
committees.
To order a copy of the Preprint Proposals
for the 2012 Edition of the NESC® click
here. We only have two (2) left in
stock!
Reminder: There is one
week remaining to register for Marne and
Associates NESC Live Web Seminar Series which
begins again on January 20,
2010.
Marne and Associates new cycle of NESC live
web seminars begins again on January 20,
2010.
This is a great low cost, no travel, and
easy way to get NESC training for your
engineering or operations personnel. More
Info. |
View a demo
of Marne and Associates OSHA 1910.269 (Power
lineman) or OSHA 1910.268 (Communication
Lineman) eLearning
Course.
NESC LIVE WEBINAR
Our NESC
Live Web Seminar titled, Applying the
National Electrical Safety Code to Day-to-Day
Utility Work starts again in January
2010.
SOFTWARE
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