Everything over a view volt diode drop gets Conducted to safety groundBecause it defeats the basic purpose of the Safety Ground system!
that's why it has fast blowing fuse in addition to your regular fuse and GFCI.In a Ground Fault (short circuit) failure it may be required to carry be required to carry 1000 Amps for a fraction of a second unit the circuit breaker trips.
Properly selected diodes can handle the current for a short period of time without doping more then a view Volts.
I don’t know can i see the the UL list somewhere?and does it have the required 'UL' or other safety agency listing?
Is it legal to sell it in the US if not?