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 Marco: You have opened a can of worms. I hope you are happy! Are you looking for the legal definition or to discover if the neutral conductor actually carries current? The answer to the legal definition is in 310.15(B)4 (2002), and the answer is: It depends (on the type of service). This on-line article sums it up well: http://ecmweb.com/nec/code-basics/electric_conductor_size_matters/ William Miller PS: In my opinion, the neutral is a current carrying conductor in any system. Disconnect it at your peril. William At 02:41 PM 5/13/2010, you wrote: Content-Type: multipart/alternative; boundary="----=_NextPart_000_0078_01CAF291.3BA43F40" Content-Language: en-us I have a disbelieving business partner who believes that the neutral conductor in a standard 120/240VAC service is a current carrying conductor. Could someone please disabuse him of that notion? Thanks, 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: 05/12/10 20:26:00
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