[RE-wrenches] current carrying conductor

[Marco Mangelsdorf]

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:



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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
 

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