If current kills, not voltage, then why do scary “high voltage” signs exist?
High voltage signs exist to warn people of the potential danger of electric shock by contact or proximity.
The numerical definition of high voltage depends on context.
Two factors considered in classifying a voltage as high voltage are the possibility of causing a spark in air and the danger of electric shock by contact or proximity.
Any voltage above 30 is generally considered to be capable of delivering dangerous shock currents.