@tubetime
so, as it's a game of taking the best case...
Let's say the USB cable used is shielded
AND
It's connected to one of these badass gaming rig, metallic case, multicolored leds... and the USB A plug shield touches the rig case
AND
the electrical installation is top specs, with a nice crossed earth pin that actually delivers some juicy 110V or 220V

Do I want to inject 220V 50Hz in my project board? and reinject it in my badass gaming rig?