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The national standard for LED lighting, which was led by the National Lighting Standardization Committee, is currently in the trial stage. The industry expects LED lighting national standards and industry standards to be introduced soon. In the focus of the industry, the reporter interviewed the executive director of the China Lighting Society, which is involved in the development of standards, and the deputy director of the China Lighting Society's Metrology and Testing Professional Committee, member of the National Lighting Standardization Committee, Hangzhou Yuanfang Optoelectronic Information Co., Ltd. Chairman and Technical Director Pan Jiangen is a professor-level senior engineer.
Since 1985, Professor Pan has been engaged in the design of optoelectronic testing technology and equipment for optics, color and electronics. As the representative of China of the International Commission on Illumination (CIE) Light and Radiation Measurement Division (D2), he participated in the discussion, drafting and voting of CIE's various technical committee standards and was elected as the spectral sensitivity of CIED2R2-38 photometric detector. The person in charge of the special method of measurement method, as an academic leader, completed two national high-tech research and development plans (863 plan) projects.
Reporter: At present, the LED industry is eagerly awaiting the introduction of LED lighting national standards. When will it be officially introduced? How long does the LED lighting national standard last from the start of planning to the current trial stage?
Professor Pan: China's national semiconductor lighting project was launched in 2003. With the participation of relevant departments and experts from the Ministry of Science and Technology and LED lighting, China has made a master plan for the standardization of LED lighting at the end of 2003. By the end of 2008, this work Great progress has been made. The National Lighting Standardization Committee has 12 standards for LED lighting that have passed the basic certification. The LED lighting standard working group of the Ministry of Industry and Information Technology has passed 7 basic LED standards. If the progress is smooth, these standards will be relevant. After further approval by the department, it is expected to be implemented in 2009.
Reporter: In the standard review draft, Hangzhou Yuanfang participated in the formulation of the three standards of "LED test methods for general lighting", "performance requirements for LEDs for general lighting" and "performance requirements for LED modules for general lighting". Talking about the importance of these three standards?
Professor Pan: It should be said that the industry trusts distant companies and myself. The distant companies have the honor to participate in the formulation of these three standards, but they also feel tremendous pressure. Because these three standards are the more basic standards in LED lighting, they will have a great impact on the future development of LED lighting. The standardization work of LED lighting in major developed countries and international organizations such as CIE and IEC is also in the discussion stage. There are some standards introduced, but they are rare and cannot be easily quoted. Therefore, these standards can indeed be said to be the most challenging since I have been engaged in standardization for more than ten years.
To this end, the company also recruits more than a dozen doctoral and master students from Zhejiang University and Zhejiang University of Technology. With the support of the National 863 Program, it specializes in technical issues related to LED lighting standardization, and also with the International Commission on Illumination (CIE). The International Semiconductor Lighting Alliance (ASSIST), the National Institute of Standards and Technology (NIST), and international authoritative organizations and famous experts from Germany, Japan, and Taiwan have conducted in-depth exchanges and closely monitored the latest developments in LED lighting standardization. We know the difficulty and importance of this work, so we dare not relax, work together with other participating units and relevant industry leaders and senior experts, and finally have the standard draft of the current three projects. These three standard drafts are the crystallization of everyone's wisdom.
Reporter: What impact will the introduction of LED lighting standards have on the industry?
Professor Pan: LED lighting itself is in the dynamic development. The domestic and foreign industries have realized that it is very difficult to standardize LED lighting at present. However, everyone is more aware that if there is no standard for LED lighting, the development of LED lighting will be more difficult. The mixed situation of fish and dragons, the unevenness of resources and the waste of resources will be more serious. It is difficult for the entire LED lighting industry to enter a benign and sustainable development.
The generation of any standard needs to be continuously developed and improved in the future practice. However, these LED standards have been discussed, debated, and debated by many experts and companies. The final written articles are comprehensive and comparatively pertinent and comprehensive, and basically reflect the current status of LED lighting, reflecting the industry, enterprises, The common interests and long-term interests of users, I believe that the introduction of standards will be more conducive to the development of the LED industry in a benign direction. 
Building wires can also be divided into three types according to the hardness of conductors.
H05V-U/H07V-U voltage class 300/500 or 450/750V. It is the most commonly used connection line for household wiring, mainly used for power supply, lighting, sockets, air conditioners and other daily household lines
H05V-R/H07V-R voltage grade is 450/750V, which can be used for home lighting lines. It is good to use when the wiring is soft and the circuit turns too much, which is convenient for electricians to wear pipes.
H05V-K/H07V-K voltage class 300/500V or 450/750V household decoration is generally not used, and it is suitable for flexible installation sites with strict requirements, such as electrical control cabinets, distribution boxes and various low-voltage electrical equipment.
What is a flexible copper cable?
Copper flexible cables are commonly used to connect portable equipment and appliances. Their flexibility allows them to withstand the movements or vibrations present in a particular application.Flexible copper cables are made from multiple strands of fine copper wire. The conductor is made of normal annealed copper of category 4 and 5. The cable has more than 6 different coloured cores. The insulation and sheath material must have the usual electrical and physical properties. Flexible copper wire is also soft, oil resistant, low temperature resistant and flame retardant.
Construction
Conductor: Multistrand copper wire
Insulation: PVC
Sheath: PVC
Associated voltage: 450/750V
Jacket colour: black, grey, white
Applications and features.
Power cables are suitable for use in wet and dry areas, conduits, pipes, slots, trays, antennas supported by messengers, and where excellent electrical performance is required. These cables are capable of continuous operation at conductor temperatures up to 90°C (normal operation in wet and dry locations), 130°C (emergency overload) and 105°C (short circuit conditions). 1/0 AWG and larger are rated for CT use.