pipedown wrote:

GFCI trip current is designed to be low and fast enough to minimize the jerk
reaction from a shock. They recognize already that most shock injuries are
secondary from the reaction.

Lets all hear it for plastic power tools and double insulation. Eliminates
the need for a ground.

But a lot of double-insulated tools have a large exposed metal area
that the user will likely hold during operation. An example is the
metal gear case of a corded electric drill. Doesn't that defeat the
double insulation? I don't use double-insulated tools with 2-prong
cords, except in GFCI-protected AC outlets, and then I test the GFCI
immediately before use.

I've had two plug-in GFCI's fail, one by shutting off the current, the
other -- its replacement, by leaving the current on all the time. The
second replacement is still OK.