Amps to Watts conversion please

Discussion in 'Anything DIY Related' started by viper357, 1 Jun 2009.

  1. viper357

    viper357 Admin MASA Contributor

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    Can anybody help me to convert amps to watts?

    I have a temperature controller that says it can handle 240v 10 amps max, how many watts of heaters does that equate to?

    Also would there be a sort of spike when all the heaters get switched on?

    Thanks.
     
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  3. scubaninja

    scubaninja

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    amps times voltage in watts. i think you need to have at least double the total heater wattage in your power supply if i remember correctly. so you can 1200W or heaters, not sure though. lighty couple help
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  4. Alan

    Alan Admin MASA Contributor

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    Yip thats correct W= AxV. For heaters i would go 2000w no problem its not like a motor that has a start up current.
     
  5. Stressed Eric

    Stressed Eric

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    As far as the spike goes, nuh uh, nothing to be concerned about there, the current is linear in most heaters and will be barely noticeable if at all. I agree with the guys above, stick to less than 2kW but ensure that your electrical infrastructure can handle it first (your wiring diameter, MCB's, etc) this is when looking at your entire load. Good luck.
     
  6. viper357

    viper357 Thread Starter Admin MASA Contributor

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    Thanks guys :thumbup:
     
  7. lIghty

    lIghty

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    Watts = Volts x Amps

    Amps = Watts / Volts

    There are 2 main types of devices, Resistive and Inductive.

    Resistive devices is like "filament" light bulbs, acts as a "Linear" device, no current surge.

    Inductive devices, like Magnictic ballasts, motors, pumps, pretty much anything that has a coil, does NOT act linear, and DOES cause a power surge on startup.

    In your case, you could run 2400watts of heaters (as they are resistive), but like Alan said, rather not run more than 2000w and giving it a "safety" factor, if it was an inductive device, I would not go more than 500w, unless you know the exact specs of the device.

    Hope that helps:)
     
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  8. viper357

    viper357 Thread Starter Admin MASA Contributor

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    Definitely, thanks.:)
     
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