[MayeulC]

Hmm, I didn't experiment much with that, but most houses are wired with 30 mA differential circuit breakers. If there is a difference of more than 30 mA between phase and neutral, it means there is a leak to ground somewhere, so the breaker trips. Well below 80 mA (though not instantly).

If you're wet though, your impedance is lower, so a lot more current can flow through you. That makes it much more dangerous to touch electrical stuff. Same with being barefoot.

Our bodies also have capacitance (complex impedance), which makes us more sensitive to AC than DC.

What I don't get is why do we still use differential circuit breakers while connecting neutral with ground instead of monitoring line impedance a thousand times a second. You'd trip the circuit breaker when connecting (including touching) neutral or phase to ground, without endangering the user (currently we only detect a user touching phase via the current flowing through them).

Have the circuit self-test multiple times a second, and use 10kV (like livestock fences) with very low capacity to measure impedance: give a serious jolt to the person touching a wire, with no danger.