When the human body is electrocuted, the higher the current into the body and the longer the duration of the current, the more dangerous it is. The degree of danger can be roughly divided into three stages: perception - get rid of - ventricular fibrillation.

①Phase of perception. Into the current is very small, the human body can feel (more than 0.5mA), does not pose a danger to people;

② Get rid of stage. Refers to the hand electrode electrocution, can get rid of the large current value (greater than 10mA), this current is dangerous, but can get rid of their own, basically does not constitute a fatal danger. When the current increases to the extent that the electrocuted person will be due to muscle contraction, spasm caused by the electrocuted person to grasp the electrified body, can not get rid of their own.

Ventricular fibrillation stage. With the increase in current and electrocution time is prolonged (greater than 50mA and ls), will lead to the occurrence of ventricular fibrillation, not immediately disconnect the power supply, will lead to death. It can be seen that ventricular fibrillation is the main cause of death from electrocution in humans. The protection of human beings, commonly used not to cause ventricular fibrillation, the basis for determining the characteristics of electric shock protection.

After the installation of electric shock protector, once the leakage fault occurs, the protector will be through the leakage disconnecting device, so that the switch automatically cuts off the power supply within 0S, thus playing a role in protecting the safe operation of various household appliances, as well as the personal safety of family members. Installation of one or several electric shock protectors next to the meter can effectively prevent the occurrence of electric shock accidents, but also to prevent household appliances due to voltage rise, which causes damage to household appliances. It also prevents home fire accidents caused by excessive loads, which result in short-circuiting of wires due to heating.

In order to eliminate the hidden dangers of electricity, grass-roots power supply offices in the rectification of the user to connect the household line at the same time, we must pay attention to the user's indoor line, take a look at the user's home there is no installation of qualified household residual current action protector and the knife gate, indoor line is not in line with the safety of electricity to ensure that the leakage of fill in the blanks, so as to truly realize the rural safety of electricity, the maximum elimination of hidden dangers of electricity, pay attention to the safety.