This standard is applicable to the mechanical performance test of copper, aluminum and their alloy round wires, flat wires, profiled wires and stranded wires. GB 4909.1-1985 General rules for bare wire test methods GB4909.1-1985 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Test methods for bare wireswwW.bzxz.Net
General
UDC 621.315.14
GB 4909.185
The provisions of this standard are consistent with the relevant provisions of international standards ISO and IEC, and refer to the relevant ASTM and BS standards.
1 Scope of application
This standard is applicable to the mechanical and physical properties test of products such as copper, aluminum and their alloy round wires, flat wires, shaped wires and stranded wires. 2 General provisions
2.1 The ambient temperature during the test is generally 10~35℃, and 23±5℃ when there is a control requirement, and it should be specified in the corresponding standards. 2.2 Unless otherwise specified in the corresponding standards, the specimens should be selected from the whole plate or the whole thunder sample. 2.3 The drawings of test instruments and equipment in the test method standard are schematic diagrams of an instrument that may be used in the test. Various test instruments and equipment must be inspected regularly in accordance with regulations to maintain good use conditions. 2. Test conditions not specified in this standard should be supplemented in the product standard. $ General description of the test ||tt || 3.1 Type tests (code T) Type tests are tests conducted by the manufacturer before providing a certain product in the product standard. The characteristic of type tests is that they are not repeated after being done once, but they must be repeated when the materials, structures and main processes used in the conductor have changed and affect the performance of the conductor, or when there are other provisions in the product standard, such as regular conduct, etc., they should also be repeated as specified. ||tt || 3.2 Sampling tests sample tests (code S) Sampling tests are tests conducted by the manufacturer to extract coils or discs of conductors or products according to the manufacturing batch and cut samples or components from them. 3. $ Routine tests Routine tests (code R) Routine tests are tests conducted on all finished conductors during manufacturing. 3.4 Normal vision
Normal vision refers to 1.0/1.0 vision, which can be corrected with glasses when necessary. Additional notes:
This standard was proposed by the Ministry of Machinery Industry of the People's Republic of China. This standard was approved by the Shanghai Cable Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Shanghai Cable Research Institute of the Ministry of Machinery Industry and others. The persons in charge of this standard are Shen Jianhua and Wu Musheng. Issued by the State Bureau of Standards on January 31, 1985
Implementation on December 1, 1985
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