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