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Using a Variac to heat a flexible rope heater

  1. Apr 3, 2009 #1
    Hi,

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

    http://www.omega.co.uk/ppt/pptsc.asp?ref=FGS_FGH_FWH&Nav=heam02

    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?

    Phil
     
  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

    berkeman

    User Avatar

    Staff: Mentor

    Yeah, and from the Omega website:

     
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