Leakage switch above the rated residual current of 30ma will not be too large, will the human body electrocution instead of tripping!

It is still relatively safe, because the AC 50Hz sine wave alternating current for a normal person's fatal current is 50mA, that is, 0.05A. 10mA is to get rid of the current, 1mA is the perceived current. And, leakage is not necessarily electrocution, for the general grounded equipment, once the leakage of electricity, will immediately trigger the trip, not that people must be touched after the leakage circuit breaker will be triggered to trip.