JB/T 8735.3-1998 This standard is a supplement to GB 5023.-~5023.7-1997 "Polyvinyl chloride insulated cables with rated voltages of 450/750V and below". The main technical parameters, basic test conditions and performance indicators of the products in this standard are in line with the provisions of GB 5023.1~5023.7-1997. This standard specifies the models, specifications, technical requirements and inspections of rubber insulated braided flexible wires. This standard is applicable to rubber insulated braided flexible wires for indoor lighting fixtures and household appliances with an AC rated voltage U0/U of 300/300V and below. In addition to meeting the technical requirements specified in this standard, cables should also meet the requirements of JB 8735.1. JB 8735.3-1998 Rubber insulated flexible cords and flexible cables with rated voltage up to and including 450/750V Part 3: Rubber insulated braided flexible wires JB8735.3-1998 Standard download decompression password: www.bzxz.net

JB8735.1~8735.3—1998
This standard is a supplement to GB5013.1~5013.7—1997 Rubber insulated cables with rated voltages of 450/750V and below. The products covered by this standard were originally specified in GB5013.2-85 and GB3958-83, but GB5013.1-5013.3-85, GB5013.4-87 and GB3958-83 have been revised. The revised GB5013.1~5013.7—1997 is equivalent to using Parts 1 to 7 of the IEC245 standard. Therefore, some products have not been included despite the demand in the domestic market and export trade. The main technical parameters, basic test conditions and performance indicators of the products in this standard are in line with the provisions of GB5013.1~5013.7--1997.
This standard is proposed and managed by the National Wire and Cable Standardization Technical Committee. The drafting unit of this standard is Shanghai Cable Research Institute, Ministry of Machinery Industry. The main drafters of this standard are Zhu Hao, Zeng Quan and Zhu Yizhen. 1 Scope
Machinery Industry Standard of the People's Republic of China
Rubber insulated cords and flexible cables of rated voltages up to and including 450/750V Part 3: Rubber Insulated braided cords This standard specifies the models, specifications, technical requirements and inspections of rubber insulated braided cords. JB 8735. 3—1998
This standard is applicable to rubber insulated braided flexible cords for indoor lighting fixtures and household appliances with an AC rated voltage U./U of 300/300V and below.
In addition to meeting the technical requirements specified in this standard, the cables shall also meet the requirements of JB8735.1. 2 Reference standards
The following standards contain clauses that constitute the clauses of this standard by reference in this standard. At the time of publication of the standard, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T2951-1997 General test methods for cable insulation and sheath materials (idtIEC811-1993) GB5013.2-1997 Test methods for rubber insulated cables with rated voltages of 450/750V and below (idtIEC245-2--1994) JB8735.1-1998
3 Usage characteristics
Rubber insulated cords and cables with rated voltages of 450/750V and below Part 1: General provisions 3.1 The rated voltage U./U is 300/300V.
3.2 The long-term allowable operating temperature of the flexible wire should not exceed 60℃. 4 Model
The model of the cable is shown in Table 1.
Table 1 Model and name
5 Specification
The cable specifications shall comply with the provisions of Tables 2 to 4. Approved by the Ministry of Machinery Industry on 1998-05-28
Rubber insulated braided flexible wire
Rubber insulated braided twisted pair flexible wire
Rubber insulated rubber protective layer total braided round flexible wire 1998-11-01 Implementation
Nominal cross section
Single wire in conductor
Maximum diameter
Insulation thickness
Specified value
JB8735.3-1998
Table 2RX type rubber insulated braided flexible wire
Average outer diameter
Note, for specifications of 0.75~1.5mm2, see 245IEC51 (RX) type braided flexible wire in GB5013.4. Table 3 RXS type braided twisted pair flexible wire
Single wire in conductor
Nominal cross section
Nominal cross section
6 Technical requirements
6.1 Conductor
Maximum diameter
Single wire in conductor
Maximum diameter
Insulation thickness
Specified value
Insulation thickness
Specified value
Each braided insulated wire core
Maximum average outer diameter
Table 4 RXH type total braided round flexible wire
Average outer diameter
6.1.1 The number and structure of conductor cores shall comply with the provisions of Table 2~4. 6.1.2 The single wire in the conductor may be tinned or not. 6.2 Insulation
Conductor resistance at 20℃
Maximum value
Tinned copper core
Conductor resistance at 20℃
Tinned copper core
Conductor resistance at 20℃
Maximum value
Tinned copper core
JB 8735. 3—1998
6.2.1 The insulation shall be a rubber mixture with code IE1. If extrusion is not used, the insulation shall consist of at least two layers, and there shall be no delamination between the two layers of insulation.
6.2.2 The insulation thickness shall comply with the provisions of Tables 2 to 4. 6.2.3 The insulated core of two-core braided flexible wire shall be light blue or brown. 6.3 Twisting
6.3.1 The insulated cores of RX and RXH flexible wires shall be twisted into cables, and the gaps between the cables shall be filled with cotton yarn or other materials with equivalent softness to make them round. RXS type flexible wires shall be twisted after the insulated core is braided. 6.3.2 The cable pitch of RX type flexible wires shall not exceed 5.5 times the calculated value of the cable outer diameter, and the cable pitch of RXH and RXS type flexible wires shall not exceed 8 times the calculated value of the cable outer diameter. 6.3.3 The twisting direction shall be right-handed.
6.4 Protective layer
6.4.1 After the RXH type flexible wires are twisted into cables, a thin layer of rubber shall be extruded. The braid shall be half-embedded in the rubber protective layer. 6.4.2 The braid shall be made of filament regenerated fiber, waxed cotton yarn or other similar materials. 6.5 Overall dimensions
The average outer diameter of the flexible wire shall comply with the provisions of Tables 2 to 4. 6.6 Origin marking
The origin marking of rubber insulated braided flexible wires can be selected from the following two methods. 6.6.1 Use a single-color or multi-color marking line that has been registered and filed exclusively for the manufacturer. 6.6.2 The manufacturer’s name or trademark shall be printed on the surface of the insulated wire core. 7 Inspection
Product inspection items, test types and test methods shall be in accordance with the provisions of Table 5. Table 5 Inspection
Inspection items
Electrical performance test
Conductor resistance
Finished cable 2000V voltage test
Structural dimension inspection
Structural inspection
Insulation thickness measurement
Outer diameter measurement
Average value
Insulation machine combing performance
Tensile test before aging
Tensile test after air oven aging
Tensile test after oxygen bomb aging
Hot extension test
Heat resistance of textile braided layer
Test type
RX, RXS. RXH
300/300V
Test method
2.1 of GB5013.2-1997
2.2 of GB5013.2—1997
GB5013.1 and GB5013.2bzxz.net
Inspection and manual test
1.9 of CB5013.2—1997
1.11 of GB5013.2—1997
9.1 of GB/T 2951.1—1997
4 of GB5013.2—1997
4 of GB5013.2—1997
CB/T 2951. 5-1997, 9
GB5013.2-1997, 6
Inspection items
Mechanical strength of finished cable
Flexing test and after test
Water immersion 2000V voltage test
Abrasion test
Marking rub test
JB 8735.3-1998
Table 5 (end)
Test type
RX. RXS, RXH
300/300V
Test method
GB5013.2—1997, 3.1 and 2.2
GB5013.2—1997, 3.3
GB5013.2—1997, 1.8
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