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Popper with long extension cord

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  • robusto
    replied
    Re: Popper with long extension cord

    Adding to the nayes.... extension cords here will not produce an effective voltage drop.

    -Robusto

    Leave a comment:


  • Thundergod
    replied
    Re: Popper with long extension cord

    I saw this thread too late to comment, but I started with a 30m lead before Id heard of this subject.
    Changing down to a 2m one made no difference, as youve explained above.

    Leave a comment:


  • niallpedlow
    replied
    Re: Popper with long extension cord

    Thanks guys. I knew there would be some knowledge around.

    It really doesnt sound like it will be worth it.

    By the time I buy a 200 metre extension cord, Id be well on my way to a Gene Cafe or Hottop.

    Leave a comment:


  • nunu
    replied
    Re: Popper with long extension cord

    14 gauge extension lead has a resistance of .00258 ohms/foot.

    Per metre the resistance is about 0.00079 ohms.

    Over a 20m extension lead, the resistance will be 0.01573 ohms.

    Say you have a 1000W popper: current = 1000 / 240 = 4.16667 amps

    Voltage drop = 0.01573 * 4.16667 = 0.06554 volts

    Youd have to have at least 200m of extension lead to see an appreciable difference, and were only talking around the order of a 0.65 volt drop.

    Leave a comment:


  • JavaB
    replied
    Re: Popper with long extension cord

    Originally posted by Kaffee Schnüffler link=1169073343/0#4 date=1169081628
    Is there some way of calculating the voltage loss? I assume it is dependant on the resistance of the lead, but there probably is some average value that could be used for resistance for a typical power lead?
    The only way is to measure the resistance of the power lead (with a multimeter) and then multiply that value by two....(active and neutral both drop voltage) and then multiply it by the current drawn by the popper (power/voltage on the popper name plate e.g. 1200 Watts = 1200/240 = 5 amps)...

    This method will be far more effective in America (110 volts and twice the current = twice the voltage drop and a 10 volt voltage drop is a 10% change....

    In Australia 240V with the same lead length you would get a 5V drop which is only a 2.5% change....

    I really dont believe it is practical.... you wont drop much and with the fan reducing as well..... you wont get much (if any) change in roast time.

    Leave a comment:


  • niallpedlow
    replied
    Re: Popper with long extension cord

    Is there some way of calculating the voltage loss? I assume it is dependant on the resistance of the lead, but there probably is some average value that could be used for resistance for a typical power lead?

    Leave a comment:


  • nunu
    replied
    Re: Popper with long extension cord

    You could always slow it down by reducing the ambient temperature.

    Roasting inside an esky full of ice blocks springs to mind as a possibility.

    Leave a comment:


  • JavaB
    replied
    Re: Popper with long extension cord

    Originally posted by nunu link=1169073343/0#1 date=1169075671
    Extension leads are widely used in the US to slow down roasts, but I dont think the practice will work here.

    If youre going to do it, go much longer than 20m. You might see some results. But youll more than likely slow the fan as well.
    Yep, I think the loss in voltage by this method would slow the fan as much as reduce the heat.....

    Less fan speed = less air movement = higher temperature
    Less heater voltage = lower temperature

    The two effects will more or less cancel out

    Leave a comment:


  • nunu
    replied
    Re: Popper with long extension cord

    Extension leads are widely used in the US to slow down roasts, but I dont think the practice will work here.

    If youre going to do it, go much longer than 20m. You might see some results. But youll more than likely slow the fan as well.

    Leave a comment:


  • niallpedlow
    started a topic Popper with long extension cord

    Popper with long extension cord

    Ive been thinking a little about extending roast times with popcorn makers.  The one I have now does decent times, not too quick, but I know its not going to last forever.  Hopefully someone out there with a little more electrical experience/theory can help with the specifics.

    If I was to plug in a popcorn maker to a long, say 10metre plus, maybe 15 or 20m, extension cord, how much of a voltage drop could I expect at the popcorn maker, and how much difference to the temperature of the heating element would this make?

    I know that I would need to make sure the cord was not rolled up while I used it.

    Maybe its just time to go and get my multimeter and check it for myself.

    Anyone got any thoughts?

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