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WodyM
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Post subject: Proposed NESC Table 410 Provisions  Posted: Mon May 05, 2008 6:34 pm |
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Joined: Tue Apr 15, 2008 10:03 am
Posts: 5
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I heard that NESC is considering revising either Table 410-1 or 410-2 or both in the near future. Has anyone else heard this and do you have any more information?
Thanks
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Catcher13
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Post subject: Posted: Mon May 12, 2008 3:21 pm |
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Joined: Sun Aug 05, 2007 5:00 pm
Posts: 21
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Wow! That's quite a pretty nasty rumor.  If it is true it will certainly confuse the utility side of things even more. Where did you hear this?
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acobb
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Post subject: Posted: Mon May 12, 2008 8:01 pm |
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Joined: Sun Dec 23, 2007 1:44 pm
Posts: 348
Location: Charlotte, NC
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Table 410 Revision
First I have heard! It is my understanding that the NESC had gone to a 5 year revision cycle (hence 2012), so if this is true then someone involved in the process needs to let us know that early revisions are forthcoming! Could make a huge difference in the advice that we give to our clients today!!!!!
Alan
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Catcher13
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Post subject: Posted: Tue May 13, 2008 7:48 am |
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Joined: Sun Aug 05, 2007 5:00 pm
Posts: 21
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That's going to be huge. There is so much confusion as it is between the NESC tables, IEEE methods, the physics models of ArcPro and Duke programs, 3 phase vs. 1 phase on overhead lines etc. As soon as anyone knows any info, please let us all know.
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apowerengr
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Post subject: Posted: Thu Aug 14, 2008 7:15 pm |
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Joined: Thu Aug 14, 2008 5:00 pm
Posts: 10
Location: Wisconsin
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I just saw the draft changes yesterday which involve only the recommendations under 1000 volts. Not sure if something will be released as a TIA before the next code cycle or not. I have to admit I don't find the NESC confusing at all - is there something in particular you have questions about?
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acobb
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Post subject: Posted: Thu Aug 14, 2008 8:16 pm |
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Joined: Sun Dec 23, 2007 1:44 pm
Posts: 348
Location: Charlotte, NC
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Confusion?
I do not find the NESC confusing at all. If fact it is so simple that I have wondered if the arc flash portion was nothing more than an after thought.
Alan
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stevenal
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Post subject: Posted: Thu Feb 12, 2009 10:23 am |
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Joined: Tue Jan 13, 2009 5:00 pm
Posts: 631
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Too different subjects seem to be getting confused here. The [url="http://grouper.ieee.org/groups/nesc/TIA_5Sept2008.pdf"]TIA[/url] has been released, dealing with the miscalculations originally done on table 2. Not sure why this was a TIA, and not errata.
I've attached a proposed 2012 table 1, dealing with secondary voltages. Presumably the '07 tables will be renumbered for 2012.
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Test 1.jpg [ 56.24 KiB | Viewed 4492 times ]
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acobb
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Post subject: Posted: Fri Feb 13, 2009 5:00 pm |
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Joined: Sun Dec 23, 2007 1:44 pm
Posts: 348
Location: Charlotte, NC
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Stevenal,
Be sure to check you private messages
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Electric John
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Post subject: Posted: Tue Mar 03, 2009 2:57 pm |
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Joined: Wed Mar 05, 2008 7:42 am
Posts: 16
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