Dangers of Electricity
In our modern era a few individuals live without contact with the phenomenon of electricity. The concept emphasizes the dual nature of the phenomenon of electricity - as necessary for life, and deadly. Daily use of electricity reduces the feeling of risk. Electricity is dangerous when passing through human body, due to the thermal effect, effect on the chemical composition of the blood and nervous system and especially due to disturbance of heart and respiratory organs. The consequences of this action depend on current intensity, duration of and the path through body.
- According to research current of 20mA causes painful muscle spasms.
- Current of 30mA can be withstood for only a few seconds, with hand muscle spasms and inability to let go of conductors.
- Current of 50 mA leads to loss of consciousness.
- Current of 100 mA has deadly consequences.
- Under existing regulations, the touch voltage must not exceed a value of 65 volts (V).
The longer the time of the passage of electricity through body the less is the tolerance of an organism. The most dangerous is the path of energy through an area of the heart, and it is the case of closing the circuit through both arms, or one arm and a leg.
Measures of protection against electrical shock:
- Before using electrical equipment it is necessary to inspect device for damage,
- Electrical appliances and equipment must be maintained regularly, and periodically checked and tested by professionally qualified and authorized person
- When you disconnect a device pull the plug out of the socket using the body of the plug and not the cord,
- When working in wet areas (cleaning, washing) only portable electrical devices with low operating voltage may be used,
- Do not put connection cables on the ground (mowers, blenders, etc.), before adequately protecting them from damage,
- In electrical installations use current protection switches to protect against contact voltage
- Replace defective fuse links only with equivalent new cartridges,
- Use only portable lamps in which all parts are protected by insulation, and lamps are not at risk of immediate damage,
- In case of lightning, unplug major electrical appliances and in particular electronic devices,
- Household wiring must be properly installed (protective grounding, neutralization)
- Fuses should be controlled periodically, blown inserts should be replaced with new original parts (without putting any strings, etc.),
- All feeder cables to devices must have undamaged insulation, and sockets and switches without mechanical and thermal damage,
- In rooms where humidity is higher the risk of electric shock is greater.