Class o electrical appliances: 220v50hz TV, computer, etc. O 1 electrical appliances: refrigerators, induction cookers, etc. Class II electrical appliances: generally not suitable for indoor motors driven by 220 volts. Electrical appliances driven by 380 volts three-phase electricity are generally suitable for large and medium-sized enterprises.
Extended data:
Anti-electric shock protection category:
1 0 device.
Refers to the equipment that relies on basic insulation as electric shock protection. Once the basic insulation fails, the safety of the equipment depends entirely on the surrounding environment. This requires the equipment to be used in a "good insulation" environment. Such as wooden floors, wooden walls, dry places around and so on. This kind of equipment, which has strict requirements on the use environment, has limited scope of use.
2. First-class equipment.
It means that the equipment is protected from electric shock not only by basic insulation, but also by connecting the accessible conductive part with the protection (grounding) wire in the fixed wiring of the facility. In this way, once the basic insulation fails, the user's safety is guaranteed because the accessible conductive part has been connected with the grounding wire.
3. Category II equipment.
Refers to the protection of equipment from electric shock not only by basic insulation, but also by additional insulation and other safety measures. Once the basic insulation fails, the additional insulation can ensure the safety of users. If it is double insulation, it is equivalent to the level of basic insulation plus additional insulation.
4. Class 4.III equipment.
Refers to equipment powered by safe ultra-low voltage. The voltage appearing in this kind of equipment cannot be higher than the safe ultra-low voltage. Class III equipment is safe away from power supply.
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