o由于接触带电部件而导致的人员流动
电流通过人体。影响包括：
-强直化：受电流影响的肌肉不自主收缩
松开被夹住的导电部件是困难的。注：非常高的电流
通常不要诱发肌肉强直，因为当身体接触时
这样的电流，肌肉收缩是如此持续，以至于
肌肉运动通常会使受试者远离传导
部分
-呼吸停止：如果电流流过控制呼吸的肌肉
这些肌肉的不自主收缩改变了正常的呼吸
过程和受试者可能因窒息而死亡或遭受后果
窒息造成的创伤；
-心室颤动：危险的影响是由于叠加
通过产生
不受控制的收缩会引起心动周期的改变。这种异常现象
可能成为不可逆转的现象，因为即使在
刺激已经停止；
-灼伤：它们是由于电流通过焦耳效应产生的热量引起的
穿过人体。
标准IEC 60479-1“电流对人和牲畜的影响”是
关于通过人体的电流影响的指南
电气安全要求的定义。本标准显示
时间-电流图，四个区域，交流对其的生理影响

o persons due to contact with live parts is caused by the flow of the current through the human body. The effects are: - tetanization: the muscles affected by the current flow involuntary contract and letting go of gripped conductive parts is difficult. Note: very high currents do not usually induce muscular tetanization because, when the body touches such currents, the muscular contraction is so sustained that the involuntary muscle movements generally throw the subject away from the conductive part; - breathing arrest: if the current flows through the muscles controlling the lungs, the involuntary contraction of these muscles alters the normal respiratory process and the subject may die due to suffocation or suffer the consequences of traumas caused by asphyxia; - ventricular fibrillation: the most dangerous effect is due to the superposition of the external currents with the physiological ones which, by generating uncontrolled contractions, induce alterations of the cardiac cycle. This anomaly may become an irreversible phenomenon since it persists even when the stimulus has ceased; - burns: they are due to the heating deriving, by Joule effect, from the current passing through the human body. The Standard IEC 60479-1 “Effects of current on human being and livestock” is a guide about the effects of current passing through the human body to be used for the definition of electrical safety requirements. This Standard shows, on a time-current diagram, four zones to which the physiological effects of alternating