Question about Fahrenheat Electric Hydronic Baseboard Heater, 240 Volt

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I have 2-240V (4.2V) basebaord heaters, Need Wiring Diagram

Hello, Buddy of mine ran 10/3 Wire for 2-240V baseboard heaters & Has a 120/240V 2-Pole 20AMP Breaker. Question for you ? He shouldn't of used 10/3 Wire for this 240V equip. The Red wire is not going to be used, correct ? As far as the 2-Pole Breaker, I will be attaching the white wire in the 2nd slot on the 2-pole breaker ? Do you have a Wiring Diagram ?

Posted by chris bil on

  • chris bil Mar 22, 2009

    What about at the breaker, tie red & black into 2-Pole Breaker, Attach Ground. What about Neutral ?

  • chris bil Mar 22, 2009

    Thanks, You have been a great help.

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You get 120V from any phase (black OR red) to neutral
you get 240V from phase to phase (between black and red) and in this scenario you don't need the white wire.
So for you, connect the black to 1 pole of the breaker and the red to the other pole, connect the green wire to the ground strip and you are done.
A white wire is NEVER connected to a circuit breaker anyway, it is a grounded wire, it would be like connecting a green wire to a black wire, bad idea.
the National electrical code specifies red and black wire color for 240VAC circuits.
As Ask Hank mentionned, nothing wrong with 10/3 wire.

Posted on Mar 22, 2009

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HANK MCNEIL

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Nothing wrong w/ 10/3 @ 20A. use the red and black and don't use the white. dosent matter which is which (blk and red).

Posted on Mar 22, 2009

  • HANK MCNEIL Mar 22, 2009

    no neutral w 240V - 2 hots and ground

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