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Using a Variac to heat a flexible rope heater

  1. Apr 3, 2009 #1

    I want to use a variac that i've got (4A rating) to power one of these:


    but a 240V version. The problem is I can't figure out if the variac that i've got has sufficient grunt to do it (without frying me, the variac or the heater).

    Any suggestions?

  2. jcsd
  3. Apr 3, 2009 #2
    The 240 volt models will draw 4.3 amps at 240 volts, so you need to limit the voltage you use out of the variac to perhaps 90% of full voltage (220 volts).

    This is a dangerous personnel hazard, even with the variac. Rope off an area around this expeiment so no one can accidentally touch it. I have seen people electrocuted before, so beware.
  4. Apr 3, 2009 #3


    User Avatar

    Staff: Mentor

    Yeah, and from the Omega website:

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