The main reasons for using low voltage in automobile electrical system are as follows.

The main reason for using low voltage in automobile electrical system is that it can completely meet the use of vehicle electrical system and electrical appliances, and the low voltage is safe enough.

Low voltage has different definitions in different countries. According to the standards of the International Electrotechnical Commission (IEC), low-voltage electricity refers to alternating current of 50 to 1000 root mean square volts or direct current of 120 to 1500 volts.

Extended data

national standard

1, UK

According to British standard BS767 1, low-voltage electricity refers to alternating current with a voltage of 50 to 1000 root mean square volts or direct current with a voltage of 120 to 1500 volts between two conductors. Or between the conductor and the ground, the voltage is 50 to 600 root mean square volts AC or 120 to 900 volts DC. Extra-low voltage is the voltage between conductors or between conductor and ground, which does not exceed 50 volts root mean square AC or 120 volts DC.

2. Hong Kong

In Hong Kong, the definition of low voltage in the Electricity Code of Practice (Wiring) Regulation and the Electricity Ordinance (Chapter 125). 406) is the same as that in the British standard.

3. America

In the United States, the national electrical code defines low-voltage electricity as 0 to 49 volts.

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