[RE-wrenches] current carrying conductor
Marco Mangelsdorf
marco at pvthawaii.com
Thu May 13 22:23:58 PDT 2010
How about some clear definitions-for-dummies of 1) linear loads and 2)
non-linear loads?
marco
Marco:
Will non-linear loads be expected? If so, the neutral is considered to be a
current carrying conductor and needs to be counted. If no non-linear loads,
then the neutral is not counted.
Code citation below (2008):
310.15(4) Neutral Conductor.
(c) On a 4-wire, 3-phase wye circuit where the major
portion of the load consists of nonlinear loads, harmonic currents
are present in the neutral conductor; the neutral conductor
shall therefore be considered a current-carrying conductor.
William Miller
PS: Who's buying dinner, you or your partner?
Wm
At 09:17 PM 5/13/2010, you wrote:
Content-Type: multipart/alternative;
boundary="----=_NextPart_000_02F9_01CAF2C8.8607F590"
Content-Language: en-us
xmlns:ns0="urn:schemas-microsoft-com:office:smarttags">
Thanks for sending that link, William.
OK.let's try it from a different perspective.
When you're running, say, three three-phase hot conductors from point A to
point B with a neutral conductor, should that neutral be considered "current
carrying" from the perspective of more than three "current carrying"
conductors in a raceway? And thereby necessitating de-rating the current
carrying capacity of the hot conductors?
marco
No virus found in this incoming message.
Checked by AVG - www.avg.com
Version: 9.0.819 / Virus Database: 271.1.1/2870 - Release Date: 05/13/10
08:26:00
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20100513/6aead3f9/attachment-0003.html>
More information about the RE-wrenches
mailing list