On 9/4/2011 11:35 AM, Dave wrote:
On Sun, 04 Sep 2011 11:14:52 -0400, tiredofspamnospam.nospam.com
wrote:

I have my whole shop on GFI, I don't trip any on startup.
GFI is specifically for ground fault.
So if you are tripping them, either the gfi is bad or you have a problem
with your end equipement / or wiring of the equipment.

Ok, one more question. What if it's just a two pronged plug (no ground
plug) as is the case with that fan in the bathroom that I mentioned?
Could a two pronged plug produce false GFI trips?

Absolutely. A GFCI does not need a ground conductor at all in order to
trip. They work by sensing *only* an imbalance in the supply and return
currents (in the black and white wires, respectively). *Anything* that
causes those currents to differ by more than 20mA will trip a GFCI,
regardless of the presence or absence of an equipment grounding
conductor either in the appliance cord or the premises wiring.