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I am wiring a 240 volt, 30 amp 2 pole receptacle for a construction heater. I am using 3 wire romex. i hooked up the ground, red and black wire and capped to white nuetral wire. i hooked up the red and black and ground in the 100 amp subpanel and also capped the white in the panel end. when i put it on i get the light on the heater but nothing else. i thought it was the heater but bought a new one so i must have something wired wrong but not sure. does it matter what side the red and black are on, i did switch them around but the same issue. confused.

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  • 1,378 Answers

Thank you for posting your question here on Fixya.com.


The only thing that would make sense is you have the two lines somehow on the same bus bar in the box or a supply issue either to the sub-panel or in it. When you power up the circuit are you getting 120 or 240 across the red and black wire? Double check the 240 in the sub panel if you only get 120. If you are getting 240 all the way to the heater then you are missing something within the heater or its instructions.


If this answer does not fix your problem, please comment with additional details prior to rating the answer. You may also contact me thru our website at www.arrowmotor.net. Positive feedback is appreciated once your problem is solved!


John

Posted on Jan 04, 2011

Testimonial: "sometimes even the little things can hold you up, glad there are thoses willing to share information and help a newbie out. Awesome!"

  • xc700coyote Jan 04, 2011

    Great checked a few things like you said. had 240 coming in an was reading 0 at the plug across the red and black 120 at the black and ground. i did have it on the same bus bar. dumb mistake but totally makes sense now.
    Thanx much :)

  • John Prohaska
    John Prohaska Jan 04, 2011

    Glad it's fixed...please take a moment to rate the answer. We work on a volunteer basis and keeping our ratings up helps make it worth while :)

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