5.2.1 The individual elements of the two terminals with two consecutive numbers to distinguish the odd number should be less than an even number, chassis, power supply lines, such as a single intermediate element and 2.5.2.2 use numbers to distinguish each terminal, the best increasing the number of natural sequence of numbers. For example: 3,4,5, etc. In the middle of the terminals on both sides of the digital selection of more than digital terminals, chassis power cable prices, and should be close to the terminals at the start flag smaller numbers, such as the middle of a two sides of elements 1 and 2 terminals of each terminal with 3,4,5 and other digital signs. Both sides terminals and two intermediate terminals 5.2.3 If several similar elements are combined into a group, the terminal can be connected to various components of the following methods to mark: a. 5.2.1 Digital preceded by letters and by regulation 5.2.2 to distinguish between each of the terminals on both sides of the terminal and intermediate, for example: With each phase terminal U, V, W flag three-phase AC system equipment; fixed not only as an insulating effect bad insulator, usually provide precise alignment and extending protection to the contact, and also has a mounting position, the locking function is fixed on the device. Fixed bad, the light caused by power outages affect access to reliable, chassis power line shorted, is the product of serious disintegration. Disintegration means mating terminals in the state, between the structure is not reliable due to the plug and socket due to material, design, technology and other causes, is not normally separated motherboard chassis power line between the pin and the socket will cause power transmission and signal control system to control severe consequences interruption. As the design is not reliable, error selection process quality poor, poor choice molding process, heat treatment, mold, assembly, welding and other assembly is not in place, and this will result in fixed bad. In addition, since the coating from the skin, corrosion, bumps, molded fins, cracked, contact processing rough, poor appearance deformation causes, due to positioning the locking with the size of the ultra-poor, poor processing quality consistency and total separation force is too Adverse exchange and other factors caused, but also common diseases. These types of failures are generally able to detect and eliminate the use of the inspection process. : With the start of the 3C certification system, the state of safety of electrical products, electromagnetic compatibility requirements put forward higher requirements, associated standards: GB16836-2003 "General requirements for measuring relays protection safety design" GB / T14598.3-1993 "insulation testing for electrical relays", JB / T 9568-2000 "power system relay protection and automatic devices General technical conditions", the international standard IEC60255-27 (CD: 2002) "Measuring relays and protection product safety requirements means "where GB16836-2003 related to safety items include: mechanical structure, housing protection, insulation coordination, fever, fire tests, electric shock, safety signs and safety instructions. Colorful chassis power lines, Xu Chong-electronic products factory, the chassis power cord from Dongguan City, Shi Jie Xu Song electronic products factory provided. Dongguan Shijie Xu Chong-electronic products plant (chuangxs.1688.com) (www.chuangxs.1688.com) Dongguan, Guangdong, connectors leaders, over the years, the company is implementing the scientific management, innovation and development, honesty and trustworthiness policy, and satisfy customer needs. Song Chong-wook in electronic products factory leadership with the staff warmly welcome all inquiries negotiations to create electronic products factory Song Chong-wook better future.