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
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