By testing a GFI, do you mean proving that it will trip, OR proving that it will trip at a current that won't be lethal to you??? We did this thread a few years ago. I need a Wiggy volunteer since I can't find a good spec. sheet for one. Test an outlet with your Wiggy in series with a Fluke on AC mA, and let me know how much current you're drawing. If its substantially greater than the value at which your GFCI should trip, (I'll bet it is.), then you're not performing a useful test. I tested an outlet at work once. 120V/10mA=12kohms. Ckt would dissipate 1.2W. I think I used a 12K, 2W resistor in series with a 50K pot, set to max., in series with my Fluke on AC mA. Going Hot to Ground, I decreased resistance slowly until the outlet tripped. I seem to recall that it was at about 7mA, a little more than I expected, but still safe. I was wondering what the spread would have been on several devices of the same part number.
Joe