waheeda said:
hi friends
plz tell either DC or AC 40 amp current is felt by human body.
Either one can shock if the magnitude is sufficiently high.
40amps of current flowing in human body will definately be felt.
There is much controversy of what safe levels are but this is typical.
Voltages under 42Vrms or 60VDC are considered "low" voltage and safe to work with.
Currents as low as 20mA if flowing through the human heart can cause defibrillation(cardiac arrest). 100uA can be felt.
Although static electricity charges can build up to several _thousands_ of volts like 10kV, 25kV and even 50kV are common, they are not dangerous because the discharge does not last long and the energy levels are not so high.
AC mains voltage at 120Vrms , 220Vrms or higher at 50/60Hz can be DEADLY.
Capacitors charged up to high voltage such as in a microwave or some TV's can be DEADLY.
High current capability doesnt necessarily mean dangerous if the voltage is low. Example, car battery.
High voltage capability doesnt necessarily mean dangerous if the current is limited and low. Example, static electricity, shock box etc..
Generally, assessing the danger level is not as simple as voltage or current but more about amount of energy delivered and where to and for how long.
To play it safe, stay away from anything over 60VDC.