ungrounded conductors

[ron macdonald]

The NEC doesn't permit the use of white or gray conductor insulation for ungrounded conductors in a raceway, even if the conductors are permanently re-identified 2008 NEC 200.7 (c) I would like to have this explained in layman's terms but the background for this is, I installed a 240 volt heater with a single phase thermostat. I put in a 20 amp double pole breaker and ran 12/2 wiring to the heater. Excuse me if I get any of the terminology wrong. As far as I understand it I don't have a neutral, the neutral is now an ungrounded conductor as well as the black. I ran it from the main panel thru a conduit(raceway) into the basement. Does the code I quoted have reference to anything I've done and should not have done. If it is something I should not have done, how do I correct it seeing that I have to run the wire thru a conduit. Also, the NEC also makes reference to a disconnect near the heater. What type of disconnect would satisfy the NEC for this size heater?

 

[ActionDave]

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