Generally for the human body, the safe voltage is 36 volts or less, so more than 36 volts of the human body energized may bring harm. Voltage is also known as the potential difference, the general safety voltage for the human body is not higher than 36 volts, so more than 36 volts of the human body energized on the possible hazards, and the degree of harm to the human body voltage, mainly depends on the size of the current through the human body and energized for a long period of time, the greater the intensity of the current, the greater the risk of fatal, and can even lead to death. Daily attention should be paid to the prevention of electric shock, carefully study the knowledge of safe use of electricity, such as household electrical equipment failure must be asked to specialize in the maintenance of technical personnel, not blindly self-maintenance, or private pull, connecting lines. Field work or play, pay attention to stay away from high-voltage power lines.