Electrical safety
- Current, not voltage (ie the amps, not the voltage) is the actual danger. A dangerous level of current is possible even with a 9 V battery.
- 1-10-100 Rule: You can feel 1 mA. 10 mA can put muscles into involuntary spasm. 100 mA can interfere with your heart and kill you.
- V = i x r : voltage equals current times amps
- At a given voltage, current increases and resistance drops.
- The human body under ideal conditions (small area of dry skin) has a resistance of 500 K-ohms.
- Moisture on skin drops this nearer to 5 K ohms.
- Immersed bodypart in water could drop this to 100 ohms.
- See All ABOUT CIRCUITS for more info
