This standard specifies the models, specifications, technical requirements and inspections of flexible wires for connection. This standard applies to copper core polyvinyl chloride insulated flexible wires for connection used in household appliances, instruments and power lighting with an AC rated voltage Uo/U of 300/300V and below. In addition to meeting the technical requirements specified in this standard, the wires shall also meet the requirements of JB 8734.1. JB 8734.3-1998 Polyvinyl chloride insulated cables, wires and flexible cords with rated voltages of 450/750V and below Part 3: Flexible wires for connection JB8734.3-1998 Standard download decompression password: www.bzxz.net

JB8734.18734.51998
This standard is a supplement to GB5023.15023.7-1997 "Polyvinyl chloride insulated cables with rated voltages of 450/750V and below". The products covered by this standard were originally specified in GB5023.1~5023.3-85 and GB5023.4~5023.5-86, but GB5023.1~5023.3-85 and GB5023.4~5203.5-86 have been revised. The revised GB5023.1~5023.7-1997 is equivalent to using Parts 1 to 7 of the IEC227 standard. Therefore, some products have not been included despite the demand for export trade in the domestic market. The main technical parameters, basic test conditions and performance indicators of the products in this standard are consistent with the provisions of GB5023.1~5023.7--1997.
This standard is proposed and managed by the National Technical Committee for Standardization of Electric Wires and Cables. The drafting unit of this standard is Shanghai Electric Relay Research Institute of the Ministry of Machinery Industry. The main drafters of this standard are Wu Zengquan and Zhu Cuizhen. 1 Scope
Machinery Industry Standard of the People's Republic of China
Rated voltage 450/750V and below
Polyvinyl chloride insulated cables and wires and cords
Part 3: Flexible wires for connecting
Polyvinyl chloride insulated cables and wires and cordsof rated voltages up to and Including 450/750 VPart 3, Cords for connectingThis standard specifies the models, specifications, technical requirements and inspections for flexible wires for connecting. JB 8734. 3—1998
This standard applies to copper core polyvinyl chloride insulated flexible wires for connecting household appliances, instruments and meters, and power lighting with an AC rated voltage U/U of 300/300V and below.
In addition to meeting the technical requirements of this standard, the wires shall also meet the requirements of JB8734.1. 2 Referenced Standards
The following standards contain provisions that constitute the provisions of this standard through reference in this standard. When the standard is published, the versions shown are valid. All standards will be revised, and the parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T2951-1997
GB 5023.2-—1997
GB 12666.2—90
JB 8734. 1--1998
3 Usage characteristics
General test methods for cable insulation and sheath materials Polyvinyl chloride insulated cables with rated voltages up to and including 450/750V Part 2: Test methods Burning test methods for wires and cables Part 2: Vertical burning test methods for single wires and cables Polyvinyl chloride insulated cables with rated voltages up to and including 450/750V Wires and cords Part 1: General provisions
3.1 The rated voltage U./U of the wire is 300/300V. 3.2 The long-term allowable operating temperature of the wire should not exceed 70℃. 4 Model
The model of the wire is shown in Table 1.
Table 1 Model and name
5 Specifications
The specifications of the wire are shown in Table 2.
Approved by the Ministry of Machinery Industry on 1998--05-28
Pin-core polyvinyl chloride insulated flexible wire for type connection 1998-11-01 Implementation
Technical requirements
6.1 Conductor
Rated voltage
300/300
The number and structure of conductor cores shall comply with the provisions of Table 3. 6.2 Insulation
JB 8734. 3-1998
Table 2 Specifications
The insulation on the conductor shall be a polyvinyl chloride mixture with the code name PVC/D. The insulation thickness shall comply with the provisions of Table 3.
The insulation resistance shall not be less than the specified value in Table 3.
Nominal cross section
0.5~~0.75
Table 3 Number of cores of RVS type 300/300V copper core PVC insulated twisted connection flexible wire × nominal cross section
Twist of insulated cores
Single wire in conductor
Maximum diameter
Insulation thickness
Specified value
Upper limit of average outer diameter
Maximum value of conductor resistance at 20℃
Insulated cores should be twisted in the right direction, and the twisting pitch should not exceed 8 times the upper limit of the average outer diameter of the cable 6.4 Outer diameter
The average outer diameter of the twisted flexible wire shall comply with the provisions of Table 3. 7 Inspection
Product inspection items, test types and test methods shall be as specified in Table 4. Table 4 Inspection
Inspection Items
Electrical Performance Test
Conductor Resistance
Finished Wire 2000V Voltage Test
Insulation Resistance at 70℃
Structural Dimension Inspection
Structural Inspection
Insulation Thickness
Insulation Mechanical Properties
Tensile Test Before Aging
Tensile Test After Agingbzxz.net
Weight Loss Test
Test Type
Tinned Copper Core
Structural Parameters Table Number
At 70℃
Minimum Insulation Resistance
Mo·km
Test Method
2.1 of GB5023.2—1997
2.2 of GB 5023. 2—1997
GB 2.4 of GB5023.2-1997
Normal visual inspection
1.9 of GB5023.2-1997
1.11 of GB5023.2-1997
9.1 of GB/T 2951.1-1997
GB/T 2951.2—1997, 8.1.3.1 and GB/T 2951.1—1997, 9.1
GB/T 2951.7—1997, 8-1
Test items
High temperature pressure test
Low temperature elasticity and impact strength
Insulation low temperature bend test
Insulation low temperature impact test
Thermal shock test
Non-flame retardation test
Marking abrasion resistance test
JB 8734.3—1998
Table 4 (end)
Test type
Test method
GB/T 2951. 6—1997, 8.1
GB/T GB/T 2951.4—8.1 of 1997
GB/T 2951.6—8.5 of 1997
GB/T 2951.6—9.1 of 1997
GB 12666.2
GB 5023.2—1.8 of 1997
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