JB/T 8734.4-1998 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 installation wires. This standard applies to copper core polyvinyl chloride insulated installation wires for internal wiring of household appliances, instruments and automation devices with an AC rated voltage U0/U of 300/300V and below. In addition to meeting the technical requirements specified in this standard, the wires shall also meet the provisions of JB 8734.1. JB 8734.4-1998 Polyvinyl chloride insulated cables, wires and cords of rated voltage 450/750V and below Part 4: Installation wires JB8734.4-1998 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 Wire and Cable Standardization Technical Committee. 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 4: Installation wires
Polyvinyl chloride insulated cables and wires and cordsof rated voltages up to and including 450/750 VPart 4, Insulated wires for internal wiring of equipment This standard specifies the models, specifications, technical requirements and inspections of installation wires. JB 8734.41998
This standard applies to copper core polyvinyl chloride insulated installation wires for internal wiring of electrical appliances, instruments, electronic equipment and automation devices with an AC rated voltage U/U of 300/300V and below. In addition to meeting the technical requirements of this standard, wires should 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 parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T 2951—1997
GB5023.2—1997
GB12666.2—90
JB8734.1—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 of the wire is 300/300V. 3.2 The long-term allowable operating temperature of AV-90 and AVR-90 wires shall not exceed 90℃, and the long-term allowable operating temperature of other types of wires shall not exceed 70℃.
Note: When the environment in which the wire is used can prevent thermoplastic flow and allow for reduced insulation resistance, the PVC mixture that can be used continuously at 90°C can have its operating temperature increased to 105°C while shortening the total working time. 4 Models
The models of the wires are shown in Table 1.
Approved by the Ministry of Machinery Industry on May 28, 1998
Implementation on November 1, 1998
AVR—90
JB 8734.41998
Table 1 Model name
Copper core polyvinyl chloride insulated installation wire
Copper core polyvinyl fluoride insulated installation soft wire Copper core polyoxyethylene insulated flat installation soft wire Copper core polyvinyl chloride insulated twisted installation soft wire Polyoxyethylene insulation Polyoxyethylene sheathed installation soft cable Copper core ℃ heat 90℃ Polyoxyethylene insulation installation wire Copper core ℃ heat 90℃ Polyvinyl chloride insulated installation soft wire The specifications of the wires are shown in Table 2.
Table 2 Specifications
AV.AV--90
AVR, AVR—90
Rated voltage
300/300
300/300
300/300
300/300
300/300
3~24*1
★) core number series, 3, 4, 5, 6, 7, 10, 12, 14, 16, 19 and 24 cores. Technical requirements
6.1 Conductor
The number and structure of conductor cores shall comply with the requirements of Table 3 to Table 7. 6.2 Insulation
The insulation extruded on the conductor shall be a polyvinyl chloride mixture of the following codes: PVC/E—AV-90, AVR-90 wire; PVC/C—other wires.
The insulation thickness shall comply with the provisions of Tables 3 to 7. The insulation resistance shall not be less than the specified values ​​in Tables 3 to 7. 6.3 Insulation core cabling
Nominal cross section
0. 08 ~0. 4
0. 08~0. 4
0. 12 ~0. 4
0. 08~ 0. 4
Structural fist number table
The insulated cores of two-core and above round wires shall be twisted into cables, and the outermost layer shall be twisted in the right direction. The twisting pitch of AVRS wires shall not exceed 8 times the upper limit of the average outer diameter of the wires.
The insulated cores of two-core wires should be placed in parallel. There should be a groove on both sides of the insulation between the conductors to facilitate the separation of the insulated cores. The cabling gap can be filled alone or with a sheath, but neither filler should adhere to the insulated core. 6.4 Sheath
The sheath extruded on the cabled core should be a polyvinyl chloride mixture with the code PVC/ST4. The thickness of the sheath should comply with the provisions of Table 7.
The sheath is allowed to fill the gaps between the insulated cores and form a filling, but it should not adhere to the insulated core. After the insulated core is cabled, it is allowed to wrap a film tape, which should also not adhere to the insulated core. 6.5 Dimensions
JB8734.4—1998
The average outer diameter of round cables and the average outer dimensions of flat wires should comply with the provisions of Tables 3 to 7. 7 Inspection
The product inspection items, test types and test methods shall be as specified in Table 8. Table 3 AV, AV-90 type 300/300V copper core PVC insulated installation wire conductor nominal cross section
Conductor nominal cross section
Number of cores × nominal cross section
Number of cores × nominal cross section
Solid conductor
Insulation thickness
Specified value
Average outer diameter
Maximum conductor resistance at 20℃
Tinned copper core
Table 4 AVR, AVR- 90 type 300/300V copper core PVC insulated flexible wire for installation, single conductor
Maximum diameter
Insulation thickness
Specified value
Average outer diameter
Maximum conductor resistance at 20℃
Tinned copper core
Table 5AVRB type 300/300V copper core PVC insulated flat flexible wire for installation, single conductor
Maximum diameter
Insulation thickness
Specified value
Average outer diameter
Maximum conductor resistance at 20℃
Tinned copper core
Table 6 Single wire in AVRS type 300/300V copper core PVC insulated twisted installation soft wire conductor
Maximum diameter
Insulation thickness
Specified value
Average outer diameter
Maximum conductor resistance at 20℃
Tinned copper core||tt ||At 70℃ or 90℃
Minimum value of insulation resistance
At 70℃ or 90℃
Minimum value of insulation resistance
Mo·km
At 70℃
Minimum value of insulation resistance
Mn·km
At 70℃
Minimum value of insulation resistance
Number of cores ×
Nominal cross section
6~7×0.12
12 × 0. 4
JB 8734.4--1998
Table 7 AVVR type 300/300V copper core PVC insulated PVC sheathed flexible wire for installation Single conductor
Maximum diameter
Insulation thickness
Specified value
Sheath thickness
Specified value
Average outer diameter or overall dimensions
Maximum value of body resistance at 20℃
Tinned copper core
Insulation resistance at 70℃
Minimum value
Number of cores ×
Nominal cross section
Single conductor
Maximum diameter
Inspection items
Electrical performance test
Conductor resistancebzxz.net
Insulation thickness| |tt||Specified value
1500V voltage test for finished cable
1500V voltage test for insulated core
Insulation resistance
Structural dimension inspection
2.1 Structural inspection
Conductor continuity test
2.3 Insulation thickness
2.4 Sheath thickness
Outer diameter or overall dimension
Ovality
Insulation mechanical properties
Tensile test before aging
Tensile test after aging
Weight loss test
Insulation heat shrinkage test
Sheath mechanical properties
Tensile test before aging
Sheath thickness
Specified value
JB 8734. 4-1998
Table 7 (Complete)
Average outer diameter or overall dimensions
Upper limit
Table 8 Inspection
Test type
Maximum value of conductor resistance at 20℃
AV-90,
AVR-90
Tinned copper core
At 70℃
Insulation resistance
Minimum value
Mo·km
Test method Method
2.1 of GB5023.2—1997
2.2 of GB5023.2—1997
2.3 of GB5023.2—1997
2.4 of GB5023.2—1997
2.4 of GB5023.2—1997
Normal visual inspection
5.5 of JB8734.1-1998
GB 5023.2—1997的1.9
CB5023.2—1997的1.10
GB5023.2—1997的1.11
GB 5023.2—1997的1-11
GB/T 2951.1—1997的9.1
GB/T 2951.21997的8.1-3.1和GB/T 2951.1—1997的9.1
GB/T2951.7—1997的8.1
GB/T2951.3—1937的10
GB/T 2951.1—1997的9. 2
Inspection items
Tensile test after aging
Weight loss test
6High temperature pressure test
6.1 Insulation
6.2 Sheath
Low temperature elasticity and impact strength
Low temperature bending test for insulation
Low temperature bending test for sheath
Low temperature tensile test for sheath
Low temperature impact test for finished cable
Thermal shock test
Mechanical strength of finished cable
Insulation core tearing test
Non-flame retardation test
Marking abrasion resistance test
JB 8734. 4—1998
Table 8 (end)
Test type
AV-90,
AVR-90
Test method
8.1.3.1 of GB/T 2951.2—1997
and 9.2 of GB/T 2951.1—1997
8.2 of GB/T 2951.7—1997
8.1 of GB/T 2951.6—1997
8.2 of GB/T 2951.6—1997
8.1 of GB/T 2951.4—1997
GB/T 2951.4—1997 of 8.2
GB/T2951.4—1997 of 8.4
GB/T2951.6-1997 of 8.5
GB/T 2951. 6—1997 of 9. 1
GB/T2951.6—1997 of 9.2
JB 8734.1—1998 of 5.6
GB12666.2
GB 5023.2—1997 of 1.8
AVR-90
Test method
8.1.3.1 of GB/T2951.2—1997
and 9.2 of GB/T2951.1—1997
8.2 of GB/T2951.7—1997
8.1 of GB/T 2951.6—1997
8.2 of GB/T 2951.6--1997
8.1 of GB/T2951.4—1997
GB/T 2951.4—1997 of 8.2
GB/T2951.4—1997 of 8.4
GB/T2951.6-1997 of 8.5
GB/T 2951. 6—1997 of 9. 1
GB/T2951.6—1997 of 9.2
JB 8734.1—1998 of 5.6
GB12666.2
GB 5023.2—1997 of 1.8
AVR-90
Test method
8.1.3.1 of GB/T2951.2—1997
and 9.2 of GB/T2951.1—1997
8.2 of GB/T2951.7—1997
8.1 of GB/T 2951.6—1997
8.2 of GB/T 2951.6--1997
8.1 of GB/T2951.4—1997
GB/T 2951.4—1997 of 8.2
GB/T2951.4—1997 of 8.4
GB/T2951.6-1997 of 8.5
GB/T 2951. 6—1997 of 9. 1
GB/T2951.6—1997 of 9.2
JB 8734.1—1998 of 5.6
GB12666.2
GB 5023.2—1997 of 1.8
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