Beyond 20,000 RPM!
Is 3 phase lower amp? I know house 240v can kill.......3 phase 440v but low amp wont do much damage to human. Will feel the zap lah.
Engineering manager told us very lucky becos few of us kena zap by voltage leak into electrical panel.
Ok, just read on it, the higher the voltage, the lower the need of current to flow.....