How big is the current allowed by human body? The human body is generally insensitive to the power frequency current below 0.5 mA. The experimental data show that the minimum current that causes sensation to different people is different. The average current of adult males is about 1.0 1 mA, and that of adult females is about 0.7 mA, which is called the perceived current. At this point, the human body will feel a slight tingling due to nerve stimulation. Similarly, the maximum current that different people can get rid of power independently is also different. The average adult male is 16 mA, and the average adult female is 10.5 mA, which is called deswelling. In general, the power frequency current below 8- 10 mA and the direct current below 50 mA can be used as the safe current allowed by the human body every year, but it is also dangerous for these currents to pass through the human body for a long time. Under the condition of installing electric shock protection device, the allowable power frequency current of human body is about 30 mA. In the air, in places that may cause serious secondary accidents, the allowable power frequency current of human body should be considered as 5 mA, without strong convulsions. Generally speaking, frequent contact with small current is not good for human body.