Recently, a young man was electrocuted in his bath while using his=20
cellphone connected to his mains charger. What that told me was the=20
power supply manufacturer did not isolate the wall charger supply from=20
the "hot" line. the circuit was in an  insulating case, right? Should=20
have been save, right? I guess not. I know you do not want to design for=20
a lawsuit or a criminal charge.

The capacitor in the circuit does not necessarily limit the current to a=20
safe level. Also, if the "hot" and the "neutral" or ground get reversed=20
by accident by an inattentive electrician or amateur, someone can be=20
killed. It is a good idea to design for safety by using a UL or other=20
tested and approved isolation transformer. Even better, purchase an UL=20
approved isolated wall transformer. Take a few apart to make sure the=20
manufacturer knows what they are doing. I hope this helps.

--=20
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