Our NESC Live Web Seminar titled, Applying the National Electrical Safety Code to Day-to-Day Utility Work starts again in January 2010.
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Experts in Electrical Code
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| NESC® and OSHA Newsletter | April 7, 2010 |
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Marne and Associates NESC and OSHA Newsletter addresses issues relevant to power and communication utilities.
In This Issue:
Underground power to gas line separation
The change proposals for the 2012 NESC have been published to gather industry comments. Comments are due by May 1, 2010
(less than one month from today!).
Change proposal CP3092 applies to NESC Rule 320B5. Change proposal CP3090 applies to NESC Rule
354A2. Both rules contain wording related to the separation required between
underground power lines and buried gas lines. CP3092 (NESC Rule 320B5) applies to
conduit systems (e.g., conduits, manholes, vaults, etc. under a big city).
This change proposal involves adding a 12" separation requirement
between a conduit system and a gas line.
Currently the Rule does not have a hard number, but it does have wording
for sufficient separation for pipe maintenance equipment. CP3090 (NESC Rule
354A2) applies to single ducts that are not part of a conduit system (e.g., a single
conduit feeding a residential service). This change proposal involves adding
an exception to allow less than 12" of separation between a supply cable in
a duct operating at not more than 300V between conductors and a gas line.
Approval of this change proposal involves accepting test results.
Industry comment is needed to review these proposed changes. 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
one (1) left in stock!
Bonding of pad mounted power and
communication equipment
The change proposals for the 2012 NESC have been published to gather industry comments. Comments are due by May 1, 2010
(less than one month from today!).
Change proposal CP3175 applies to NESC Rule
384C. This change proposal is to clarify that the bonding requirement
between above ground metallic power and communication apparatus (separated
by 6' or less) applies to the metallic enclosure, not the metallic parts
contained in the enclosure. Currently there is confusion related to the
bonding requirement
when a fiberglass enclosure contains metallic apparatus inside. Hopefully, this
proposed change will remove the confusion.
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
one (1) left in stock!
Marne and Associates new cycle of NESC live web seminars begins again on
May 5 or 19, 2010.
This is a great low cost, no travel, and easy way to get NESC training for your engineering or operations personnel. More Info.
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 View a demo of Marne and Associates OSHA 1910.269 (Power lineman) or OSHA 1910.268 (Communication Lineman) eLearning Course.
NESC LIVE WEBINAR
 Books & References
 Purchase McGraw-Hill's NESC 2007 Handbook, the NESC, and other books and references from the Code Store. SOFTWARE
Purchase software to help aid your overhead and underground line design calculations or request a demo.
 Marne and Associates provides expert witness services relating to the National Electrical Safety Code and OSHA.
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If you have a question for our newsletter, please send an email to kirstin@marneassociates.com with a concise description of your NESC or OSHA question. We attempt to answer every question received, but the volume and type of questions limits us.
Disclaimer: The content of this newsletter should be considered general information only. It is not intended to be consulting engineering advice, legal advice, or an official interpretation of the NESC® or OSHA requirements.
Information and diagrams contained in this document attempt to show common situation where the 2007 NESC Code applies. Diagrams and photos are intended to be used as visual aids to the reader of the Code and are not intended to be a replacement for the comprehensive nature of the Code as it is written.
Any figures and/or photos used in this document derived from McGraw-Hill's NESC® Handbook were used with permission from the publisher, McGraw-Hill Companies, Inc.
Copyright © 2009 Marne and Associates, Inc.
Information and diagrams contained in this document attempt to show common situation where the 2007 NESC Code applies. Diagrams and photos are intended to be used as visual aids to the reader of the Code and are not intended to be a replacement for the comprehensive nature of the Code as it is written.
Any figures and/or photos used in this document derived from McGraw-Hill's NESC® Handbook were used with permission from the publisher, McGraw-Hill Companies, Inc.
Copyright © 2009 Marne and Associates, Inc.
