On: Why Does the U.S. Have Three Electrical Grids?

[kelnos]

I'm (mostly) with you on the plastic casing, but in general (in the US at least) you only see GFCI in kitchens and bathrooms.

Meanwhile I'm sitting 2 feet away from a nearly completely metal lamp with a two-prong plug.

[lucioperca → kelnos]

Find this very scary not having RCD on some plugs even with 120 Volts. Sure 240v with RCD will give you a massive shock but still will very unlikely kill you. No RCD on the other hand can be fatal on 120V: https://edition.cnn.com/2017/07/18/health/teen-bathtub-elect...