The American market uses UL 62368, UL 1012 and UL 1310. UL 1012 and UL 1310 are local national standards in the United States and Canada and are not applicable to other countries. Only products that meet class 2 can apply for UL 1310. The European market mainly uses EN 61558-1/EN 61558-2-16.

CLASS I: This type of equipment refers to the protection against electric shock through the use of basic insulation, and also provides a protective grounding impedance connected to the building. When the basic insulation fails, this grounding impedance will be subject to dangerous voltage to the ground. That is to say, the switching power supply of CLASS I will provide a pair of ground connection terminals. CLASS II: This type of equipment not only relies on basic insulation to prevent electric shock, but also must provide additional safety protection measures of double insulation or reinforced insulation, and does not rely on grounding protection. That is to say, the switching power supply of CLASS II does not provide a pair of ground connection terminals. LPS: Its main purpose is that when the electronic circuit is powered by LPS, the current and energy of this circuit can be below the specified standard value according to the requirements of IEC 62368-1 Table Q.1 standard, and the risk of fire caused is greatly reduced. Therefore, the spacing on this circuit and the fire protection level of the parts are also reduced a lot, so the shell material of these circuits can be HB-level plastic material to achieve the purpose of cost saving. It mainly comes from information audio and video products (IEC/EN/UL 62368-1). Class 2: Its main purpose is that when the electronic circuit is powered by Class 2, the current and energy of the circuit can be below the specified standard value according to the requirements of UL 1310 Table 30.1 standard, and the risk of fire is greatly reduced. Therefore, the spacing and fire protection level of the components on this circuit are also reduced a lot, so the shell material of these circuits can be HB-level plastic material to achieve the purpose of cost saving. It mainly comes from UL class 2 Power units (UL 1310).

ENEC (European Norms Electrical Certification) is a safety standard mark in Europe. Its scheme is based on the European full certification scheme of ISO-type5. The scheme was first established in 1991. There are a total of 24 member certification bodies participating in the scheme (including the common TUV, VDE, DEMKO, NEMKO). At first, it was only applicable to various types of lamps. After the efforts of the European Industry and Consumer Organization, the scope of application has now covered ◎ lighting products and their accessories ◎ switches, controllers ◎ connectors, couplers, plugs ◎ consumer electronics/audio-visual equipment ◎ information technology equipment ◎ household appliances ◎ safety isolation transformers ◎ electrical appliances, filters and other products. Therefore, ENEC is a more valuable and reliable certification mark. The difference between LED power supply application ENEC and TUV is that ENEC not only needs to meet the safety regulations EN 61347-1 & EN 61347-2-13, but also needs to meet the Performance EN 62384 requirements. For example, the LED power supply will be required to perform a normal burn-in for 200 hours in a tc environment to ensure the suitability of the product Tc declaration.

Not necessarily. Generally, the location of the power supply in the system, the arrangement of the wire group, and the system grounding design will all have some degree of influence. The same power supply will often have different results in different usage environments or applications. Our test results are based on the settings in the EMC test report.