Why is the underwater lamp voltage lower than 36V?
The "safe voltage" that allows continuous contact under normal environmental conditions is 36V. The industry stipulates that the safe voltage is not higher than 36V, the continuous contact safe voltage is 24V, and the safe current is 10mA. Therefore, in order to prevent safety accidents and avoid the tragedy of electrocution, the voltage of underwater lights should be lower than 36V.
The greater the current intensity, the greater the fatal danger; the longer the duration, the greater the possibility of death. The minimum current value that can be felt by people is called sensing current, AC is 1mA, DC is 5mA. The maximum current that a person can get rid of after an electric shock is called escape current, AC is 10mA, DC is 50mA. In a short period of time, the life-threatening current is called lethal current. For example, a current of 100mA passing through the human body for 1s can be enough to kill a person, so the lethal current is 50mA. In the case of a protective device to prevent electric shock, the current allowed by the human body can generally be considered as 30mA.
The reason why people are electrocuted is because a large amount of current passes through the body, because the safety of electricity is expressed by the amount of current. And it is not easy to identify in daily life, so the general regulation is to convert the safe current into a safe voltage. When the human body is normally dry, the resistance is about 1700 ohms. Generally, our daily electricity consumption is 220V, and the current is about 130mA. Direct contact with electricity will lead to death. If the voltage is lowered below about 40-50V, the current can be controlled within a safe range, that is, below 30mA. Therefore, many countries stipulate 40-50V as a safe voltage. The safety tripping current of the general leakage protection switch is 30mA. Once an electric shock occurs, the circuit will be powered off within 0.1 seconds to achieve the purpose of protecting personal safety.
The underwater lamp is immersed in water. Although there are certain conditions, the current passing through the lamp sometimes reaches 1000-2000mA, but because the voltage supply is only up to 24V, the resistance of the human body is large enough. and the current through the human body cannot produce a fatal high current when an electric shock occurs. , so there is no danger. For example, the battery car we use in our daily life is powered by a 48V battery, and the output current is about 2000mA. At this time, the human body will not be in danger of electric shock.
Therefore, the voltage of the underwater lamp should be lower than 36V to prevent the occurrence of safety accidents. After all, water is also a good conductor, which is more prone to accidents. Therefore, when purchasing underwater lights, in order to further ensure safety, be sure to remember to equip with a transformer.
If you have any needs or questions, you can contact us through the contact information below!
Whatsapp and Wechat: +8613168568972
