electric baseboard heater

Discussion in 'HVAC Heating & Cooling' started by hids2000, Jul 15, 2007.

  1. hids2000

    hids2000 New Member

    May 31, 2006
    Belleville NJ
    I am thinking of installing three electric baseboard heater in my living room.
    They are 240v 1500watt each.

    Can I run all three heater from one circuit? 240V 20amp
    Or do I have to run three separate circuits?

  2. leejosepho

    leejosepho DIY scratch-pad engineer

    Nov 23, 2006
    disabled-retired industrial fabricator
    200 miles south of Little Rock
    1500 / 240 = 6.25 amps each

    6.25 * 3 = 18.75 total amps

    20 * .8 = 16 amps max for safety

    30 * .8 = 24 amps max for safety

    With the safety buffer figured in, I believe 18.75 amps would be too much for a 20-amp circuit, so you would have to have a 30. And, your thermostat and/or relay must also be able to handle that kind of load.
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  4. hids2000

    hids2000 New Member

    May 31, 2006
    Belleville NJ
    ok thanks. I forgot about the 20% allow for safety.
  5. geniescience

    geniescience Homeowner

    Nov 27, 2005
    humid summers hot, humid winters cold
    electronic thermostat. $50.

    use smaller baseboards, and let an electronic thermostat keep them warm all the time. Using the old on-off thermostat, they get turned on full blast and they send hot air up to the ceiling.

    It does still warm the place up, but not the best way according to the ASHRAE comfort standard. Heated air rises, while heat in objects radiates wamth in all directions not just upwards. The old way of ON-OFF thermostat made baseboards convectors.

    With an electronic thermostat, warm baseboards become radiators, and they can still act as convectors too. Saves money (and that has been proven in the field) because a slight heat continually on is more efficient than a large heat turned on every so often.

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