: 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. Many production of metal materials, manufacturers are these efforts, conductivity and temperature directly affect contact resistance, chemical elements and material quality of elasticity, elastic modulus, hardness, tensile strength related to the elastic modulus of selecting material mechanics The formula to calculate the fourth strength theory. The greater the conductivity of the material, the more lower contact resistance small temperature rise, and plug the relationship between force and contact resistance quadratic curve, the motor wire specifications, the contact resistance is divided into: compression resistance, the film resistance, volume resistance (conductor resistance itself). 70 to 80% of the total resistance of the film resistors, electrical wire, is also a major factor in the impact of the life of the connector, should be given full attention, electrical wire factory outlets, with regard to the terminals to more than Gold and silver plating, electrical conductivity although silver higher than gold, but not gold good chemical stability, resistance film caused far greater than gold, so find out the relationship between the above there is the choice of materials for our guidance, it is a prerequisite for product design. Pass test crimping wires when the electrical equipment is often found in core crimp individual wire feeding is not in place, or to the position after not lock motor wire standard material, the contact unreliable. Analyze the reasons for individual installation at a burr hole thread stuck or dirty. Particularly the use of plants have been installed electrical equipment to the last few holes of a plug seat, found the flaws after the other hole had been installed crimped wire discharged one by one, to replace the plugs and sockets. Further, since the wire diameter and crimping aperture select a mismatch, or due to operational errors crimping process, crimp terminal will result in an accident is not strong. For this reason, the production plant in front of the finished product to plug (seat) for the delivery of all the mounting holes through the sample test, which uses handling tools crimped wire pins or jack-bit simulation to check whether locked. Based on technical conditions prescribed for by the root crimped wire pull-off force of inspection. Electrical wire factory direct _ Xu Song Chong electronic products factory _ electrical wire provided by the Dongguan City, Shi Jie Xu Song electronic products factory. Dongguan Shijie Xu Chong-electronic products plant (chuangxs.1688.com) (www.chuangxs.1688.com) quality of service and products, continue to receive the recognition and trust of new and old customers and the industry. Our company is a certified member of the whole alliance network operators, business alliance customer service icon on the page, you can talk directly with our customer service staff, to our future cooperation happy!