Which current is more dangerous?

The nature of the electric current is of two kinds: constant and variable. Experts still can not come to a consensus on what kind of current is more dangerous for humans.

Types of current

• Alternating current. The higher the frequency of its stress, the less harm it has on the body. At a frequency of more than 1000 Hz a person may not feel that his body is piercing current: power up to 2 kW at a frequency of 10 kHz and a voltage of 10 kW does not cause discomfort or discomfort. The current of high frequencies is used in medicine and is not at all dangerous to human life. But if the frequency is less than 300-500 Hz, then such an AC impact is deadly. Alternating current is used in everyday life and "hides" in ordinary outlets.

• D.C. Unlike the variable, the higher the DC current, the more detrimental its impact on health and life. The current, dangerous to life and health, is already 6 mA, it is noticeable for the skin; a current of 10 mA causes muscle cramps; with 50 mA, asphyxia begins (respiratory failure and airway cramps); from 300 mA, the blood begins to curl and cardiac arrest is possible. The longer the time of exposure to the body of a person, the more actively internal organs are destroyed. The constant current "lives" in industrial, transport installations.

It can be concluded that the alternating currentharmless permanent, but it is not - alternating current is dangerous because its frequency is close to the frequency of contraction of the heart muscle, which leads to cardiac arrest. What kind of current is dangerous for a person is difficult to say, everything depends on the voltage, duration, direction and frequency of the current.