1) I picket it up at a BIG BOX hardware store (Lowe's)
2) Brand name seems to be "Cooper Wiring Devices." VGFS15V-M-L
3) Made in China (Red China, I suppose)
4) The device itself isn't marked with a model number, etc. (I guess it's
marketed thru several different companies.)
When I wired my bath 25 years ago I put the outlet and lights (which had
outlets on them) on a switch. The circuit is Switch -> GFCI -> Lights.
This was done so the outlets on the lights would be GFCI protected. It has
worked well for 25 years with no false trips.
You are close but what I'm thinking may be the reason could have to
do with the way a GFCI works. If you short the neutral and ground
on a GFCI outlet, the GFCI will trip. If power were to accidentally
energize the neutral on the circuit that the GFCI outlet is on and
the power to the electronic control is off, the outlet would not
trip. A GFCI will trip under all fault conditions, not just power
to ground. You should try to trip one by shorting the neutral to
ground and you'll see what I mean.
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