According to the Catalogue of Special Operations, electrical work refers to the operation, maintenance, installation, overhaul, transformation, construction and debugging of electrical equipment (excluding grid-connected operation of power system).
High-voltage electricity industry: operation, maintenance, installation, overhaul, transformation, construction, debugging and testing of high-voltage electrical equipment of 1 kV and above, and testing of insulation tools and appliances;
Low-voltage electrical work: installation, debugging, operation, maintenance, overhaul, transformation and test of low-voltage electrical equipment below 1 kV;
Explosion-proof electrical operation: installation, overhaul and maintenance of various explosion-proof electrical equipment. It is suitable for explosion-proof electrical operation except underground coal mine.
Extended data
Voltage can be divided into high voltage, low voltage and safe voltage.
The difference between high voltage and low voltage is based on the voltage value of electrical equipment to ground. The voltage to ground is higher than or equal to 1000 volts. The voltage to ground is lower than 1000 volts.
Among them, safe voltage refers to the voltage that the human body contacts for a long time without the danger of electric shock. According to the national standard "GB3805-83", safe voltage stipulated the voltage series provided by specific power sources to prevent electric shock accidents. China has stipulated the following five grades for power frequency safe voltage, namely, 42V, 36V, 24V, 12V and 6V.
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