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    cejames1's Avatar
    cejames1 Posts: 2, Reputation: 1
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    #1

    Oct 22, 2010, 07:17 AM
    can I run 3 x 2.0 kW panel heaters from a 13 amp circuit safely
    Can I run 3 x 2.0 kW panel heaters from a 13 amp circuit safely
    donf's Avatar
    donf Posts: 5,679, Reputation: 582
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    #2

    Oct 22, 2010, 07:25 AM

    What is the voltage that is required?

    For example, a 120VAC/15 amp circuit can only handle a max of 1800 Volt/Amps (or Watts).

    That provides an immediate answer of "No". 2,000 Watts cannot be carried at 15 amps so obviously 13 amp is to small.

    However, a 120VAC/20 amp circuit can carry up to 2400 Volts/Amps (Watts).

    You really need to give us more descriptive information about what you are planning.
    tkrussell's Avatar
    tkrussell Posts: 9,659, Reputation: 725
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    #3

    Oct 22, 2010, 07:35 AM
    They use 13 amp circuits in the Europe. The voltage is 230 to 240 volts +/-.

    I suspect this is where the poster is from.

    Here is Ohm's Law, plus you will need to confirm any derating values for circuits from your local Building Standards.
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    cejames1's Avatar
    cejames1 Posts: 2, Reputation: 1
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    #4

    Oct 22, 2010, 07:40 AM
    Pannel heater installation
    Hi, I want to run three monterey panel heaters as background heat in a small flat, the heaters start at 0.5kW,0.75kW, 1.0kW, 1.5kW and 2.0kW. Is this possible and which ones should I choose please
    I want to just bascally plug them into adjacent existing sockets...
    donf's Avatar
    donf Posts: 5,679, Reputation: 582
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    #5

    Oct 22, 2010, 08:48 AM


    I am not familiar with the voltages and amperage's in the UK (I'm guessing that's where you are from), but let's exercise Ohm's Law a little bit. I believe that 3000 Watts or 3.0 kWatts is the max allowed on a 13 Amp circuit.

    0.5 Watts equals 500 Watts. 500/230 (wall outlet voltage?) = 2 amps.

    2.0 KWatts is 2000 Watts using the same principle, 2000/230 = 9 Amps. You cannot use this heater on a 13 Amp general branch circuit with multiple receptacles. Very risky because of its load. It would be fine on a dedicated 13 amp circuit.

    A 1.5 KW heater would require a 7 amp circuit. It would be risky to use this on a 13 amp multiple use circuit.

    1KW will require 4 amps.

    So it looks to me as if you really have three choices. Heaters from 0.5 through 1.0 KW. But I am not really familiar with the standards of UK branch circuits.
    donf's Avatar
    donf Posts: 5,679, Reputation: 582
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    #6

    Oct 22, 2010, 09:12 AM

    CeJames,

    Please re-read my response. I had to correct some glaring error in it.
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