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Electric Shock

Electric shock is when a current flows through the human body.

Ventricular fibrillation

Prevention of the heart to act as an effective pump. Stops blood circulation to all parts of body. Causes death in a very short time.

Degree of danger

Depends on

  • Value of the body current
  • Time for which the current flows

Zones

The below chart shows the time/current zones of effects of 50 Hz current on the human body:

Electric shock zones

ZoneDescription
Zone 1No sensation
Zone 2Perceptable. Not harmful. 10mA is the threshold of let-go
Zone 3Mascular contractions and difficulty in breathing. Usually no danger of ventricular fibrillation. (0.5% possibility)
Zone 4Probability of ventricular fibrillation increases. (a - up to 5%, b - up to 50%, c - more than 50%)