Bob,
A few months ago, a gentleman suggested just using a Wiggy Hot to Gnd to check a GFCI. I thought that a solenoid type tester might draw too much current to indicate proper function of a GFCI. We could search to find my old results, but I seem to recall that the current was about 8 times the trip spec. If this is the case, a solenoid type tester might well place a greater burden on the so called "phantom", or "residual", or "voodoo that you do so well" voltage, compared to a human. I know that my body will never see more voltage across it than my meter will at the same two points. Not so for a Wiggy.
Whatever TNSunny's needs might be, he already owns a high quality Fluke DMM. To invest in another tester just to put a greater load on a circuit isn't the way to go IMHO. I use just about every function on my 187 so a Wiggy wouldn't cut it for me. I might well suggest buying a Wiggy over a Fluke to someone, depending on the planned usage. Why pay the extra bucks if you don't need the extra function?
As a specific answer to your question, motor starts come to mind. What were the minimum voltages present on my phase loss monitor when the lead pump started? Do I have enough lower margin dialed in or will we just be doing repetitive pre-lubes from here on out. That UPS is non-synced. What is my input voltage and frequency? If I kill my alternate, am I free running at 60 Hz? Is my battery float at 133V and Equalize at 140V?
Finally, I like to play, "Sledgehammer" while driving finishing nails with a claw or ball peen hammer. "Solsbury Hill" goes better with troubleshooting except for the "boom, boom, boom" part. "Shock the Monkey" should probably be kept out of the rotation.
Joe
