In article , Terry wrote:
On Dec 28, 9:14=A0pm, (Doug Miller) wrote:

Whether it collapses 60, 120, or a thousand times a second when running is not
relevant, because when the fan is running, both wires are connected to the
GFCI. With power to the fan routed through a single-pole switch so that only
the hot conductor is opened by the switch, only *one* wire is connected to the
GFCI, thus making it possible for the collapsing field to cause imbalanced hot
and neutral currents at the GFCI.

With only "one" wire connected to the GFI there is no difference of
potential either. It kind of makes induced currents impossible too,
but run with it.

Maybe you ought to spend a little more time thinking about that...

Want to bet on the double pole switch?

Sure.

--
Regards,
Doug Miller (alphageek at milmac dot com)

It's time to throw all their damned tea in the harbor again.