Well, according to IEC-International Eletrotechnical Commission, 30 mA should be regarded as a sort of an "alert borderline", AC or Dc it doesn' matter.
At 50 km/h in case of an accidental contact with live parts, considering a body impedance of approx 1500 Ohm, you might be interested by a direct contact with 50 V exposed parts sufficient to produce in turn a current of 30 mA, or even more.