JB/T 8735.2-1998 JB 8735.2-1998 Rubber insulated flexible cords and flexible cables of rated voltage 450/750V and below Part 2: General purpose rubber sheathed flexible cables JB8735.2-1998 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 Technical Committee for Standardization of Wires and Cables. 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
Standard of the Machinery Industry of the People's Republic of China
Rubber insulated cords and flexible cables of rated voltages up to and including 450/750 V Part 2: General purpose rubber sheathed flexible cables Rubber insulated cords and flexible cables of rated voltages up to and including 450/750 V Part 2 Tough rubber sheathed flexible cables for general purposes
This standard specifies the models, specifications, technical requirements and inspections of general purpose rubber sheathed flexible cables. JB8735.2-1998
This standard applies to general purpose rubber sheathed flexible cables for household appliances, power tools and various mobile electrical equipment with an AC rated voltage U./U of 450/750 V and below.
In addition to meeting the technical requirements specified in this standard, the cable shall also meet the requirements of JB8735.1. 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/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 Rubber insulated cords and cables with rated voltages of 450/750V and below Part 1: General provisions 3 Usage characteristics
3.1 Rated voltage U. /U is 450/750V, 300/500V and 300/300V. 3.2. The long-term allowable operating temperature of the cable should not exceed 60℃. 3.3 "W\-type derived cable has weather resistance and certain oil resistance, and is suitable for outdoor use or contact with oil pollution. 4 Model
The cable model is shown in Table 1.
Table 1 Model and name
YZ, YZW
Light rubber sheathed flexible cable
Medium rubber sheathed flexible cable
YZB, YZWB Medium rubber sheathed fan-shaped flexible cable
Heavy rubber sheathed flexible cable
Approved by the Ministry of Machinery Industry on 1998-05-28
Main purpose
Used for light mobile electrical equipment and tools
Used For various mobile electrical equipment and tools
For various mobile electrical equipment and tools
For various mobile electrical equipment, can withstand large mechanical external force 1998-11--01 implementation
The cable specifications are shown in Table 2.
YZB, YZWB
Technical requirements
6.1 Conductor
Rated voltage
300/300
300/500
300/500
450/750
450/750
JB 8735. 2--1998
Table 2 Specifications
4 (three large and one small)
23, 4, 5, 6
4 (three large and one small)
4 (three large and one small)
6.1.1 The number and structure of conductor cores shall comply with the provisions of Tables 3 to 7. 6.1.2 The single wires in the conductor may be tinned or not. 6.2 Insulation
6.2.1 The insulation shall be a rubber compound with code IE1. 6.2.2 The insulation thickness shall comply with the provisions of Tables 3 to 7. 6.3 Insulated core cabling
Nominal area
120150
2. 5 ～~150
6.3.1 The insulated cores of two-core or more round sheathed cables shall be twisted into cables, and the twisting direction shall be right-handed. 6.3.2 The insulated cores of two-core or more flat sheathed cables shall be placed in parallel. 6.4 Sheath
6.4.1 The sheath of YQ, YZ, YZB, and YC cables shall be a rubber mixture code-named SE3. The sheath of YQW, YZW, YZWB, and YCW cables shall be a rubber mixture code-named SE4. The inner layer of the double-layer sheath is a rubber mixture code-named SE3, and the outer layer is a rubber mixture code-named SE4. 6.4.2 The sheath thickness shall comply with the provisions of Table 3 to Table 7. 6.5 Overall dimensions
The average outer diameter of round cables or the average overall dimensions of flat cables shall comply with the provisions of Table 3 to Table 7. Table 3
Nominal cross-section
Single wire in conductor||tt ||Maximum diameter
300/300VYQ, YQW light rubber sheathed flexible cable insulation thickness
Specified value
Sheath thickness
Specified value
Average outer diameter
Structural parameter table number
Maximum conductor resistance at 20℃
Tinned copper core
Nominal cross section
Single wire in conductor
Maximum diameter
(four cores, three large and one small structure)
3×1.5+1×1.0
3×2.5+1×1.5
3X4+1X2.5
3×6+1×4
0.26/0.21
0.26/0.26
0.31/0.26
0.31/0.31
JB 8735.2—1998
Table 4300/500V
Insulation thickness
Specified value
YZ, YZW medium-sized rubber sheathed flexible cable
Sheath thickness
Specified value
Average outer diameter
Note: The DC resistance value of the grounding core in the four-core three-large and one-small structure is the same as that of the main core of the same model with the corresponding cross-section. Table 5300/500V
Nominal cross section
Single wire in conductor
Maximum diameter
Insulation thickness
Specified value
Maximum conductor resistance at 20℃
Tinned copper core
(main line core conductor resistance)
YZB,
YZWB medium rubber sheathed flat flexible cable
Sheath thickness
Specified value
Average overall dimensions
6. 8 × 11. 3
5.0 × 11.3
5.9 × 13.4
6.8 × 15.7
7. 5 × 17. 4
4.1×11.2
4.2×11.8
4. 9×7.8
6.3×10.2
7.3×12.0
8.5×14.1
9. 3×15. 5.3×11.6
6. 3 ×14. 1
7. 3 ×16.7
8.5×19.7
9.3×21.7
5.1×14.0
5.3×14.7
Maximum conductor resistance at 20℃
Tinned copper core
Nominal cross section
Nominal cross section
1×150
1×185
1×400
Single wire in conductor!
Maximum diameter
Single wire in conductor
Maximum diameter
Insulation thickness
Specified value
JB8735.2—1998
Table 5 (end)
Sheath thickness
Specified value
450/750V
Insulation thickness
Specified value
Average overall dimensions
5.2×14.6
6.1×17.3
7.0×20.4
7.6×22.5
4.3×13.7
6.6×18.3
7.6×21.6
8.7×25.5
9.6×28.1
5.4×17.2
4.4×14.5
5.5×18.1
5.2×17.8
6.3×21.3
7.2×25.1
9.0×31.3
10.0×34.8
4.3 ×16.1
4.6×17.1
5.4×21.1
6.4×25.2
8.2×33.0
5.4×20.1
5.8×2 1.4
6.8×26.4
8.1×31.5
9.2×37.2
10.3×41.2
YC heavy rubber sheathed flexible cable
specified value of sheath thickness
average outer diameter
maximum value of conductor resistance at 20℃
tinned copper core
maximum value of conductor resistance at 20℃ n/km
tinned copper core
nominal section
3×120
3×150
4×150|| tt||Single wire in conductor
Maximum diameter
Four cores, three large and one small structure
3X2.5+1X1.5
3X4+1X2.5
3×6+1×4
3×10+1×6
3×16+1X6
0.26/0.26
0.31/0.26
0-31/0.31
0.41/0.31
0-41/0.31
Insulation thickness
Specified value
JB 8735. 2—1998
Table 6 (continued)
Specified value of sheath thickness
Average outer diameter
Conductor resistance at 20℃
Maximum value
Tinned copper core
(Main conductor resistance)
Nominal cross section
3×25+1×10
3×35+1×10
3×50+1×16
3×70+1×25
3×95+1×35
3×120+1×35
3×150+1X5
Single wire in conductor
Maximum Large diameter
0.41/0.41
0.41/0.41
0.41/0.41
0.51/0.41
0.51/0.41
0.51/0.41
Insulation thickness
Specified value
JB8735.2-1998
Table 6 (End)
Specified value of sheath thickness
Average outer diameter
Note: The DC resistance value of the grounding wire core in the four-core three-large and one-small structure is the same as that of the main wire core of the same model with corresponding cross-section. Table 6 (End)
Specified value of sheath thickness
Average outer diameter
Note: The DC resistance value of the grounding wire core in the four-core three-large and one-small structure is the same as that of the main wire core of the same model with corresponding cross-section. 450/750VYCW heavy rubber sheathed flexible cable core number
nominal cross section
3×120
3×150
single wire in conductor
maximum diameter
four-core Lan Da Yi
small structure
3×2.5+1×1.5
3×4+1×2.5
3×6+1×4
3×10+1X6||t t||3×16+1X6
3×25+1X10
3X35→1X10
3×50+1×16
3×70+1×25
3×95+1×35
3×120+1×35
0.26/0.26||tt ||0.31/0.26
0.31/0.31
0. 41/0.31
0.41/0.31
0.41/0.41
0. 41/0. 41
0.41/0.41
0.51/0.41
0.51/0.41
0.51/0.41
Insulation thickness
Specified value
Specified value of sheath thickness
Average outer diameter
3×150+1×50
0.51/0.41
Note: DC resistance of the grounding wire core in the four-core three-and-one-small structure The value is the same as the main line core of the same model with the corresponding cross-section 50
Conductor resistance at 20℃
Maximum value n/km
Tinned copper core
Conductor resistance at 20℃
Maximum value n/km
Tinned copper core
(Main line core conductor resistance)
7 Inspection
JB8735.2—1998
Product inspection items, test types and test methods shall be in accordance with Table 8. Low temperature test is only applicable to cables with a conductor nominal cross-section of 16mm2 or less. Table 8 Inspection
Test type
Inspection items
Electrical performance test
Conductor electrical
Insulated core according to the specified insulation thickness
Voltage test
1500V for 0.6mm and below
2000V for 0.6mm and above
2500V voltage test for insulated core
2000V voltage test for finished cable|| tt||2500V voltage test of finished cable
Structural dimension inspection
Structural inspection
Insulation thickness
Sheath thickness
Outer diameter or overall dimension measurement
Average value
2.4.2 Ovality
Insulation mechanical properties
Tensile test before aging
Tensile test after aging in air supply box
Tensile test after aging in oxygen bomb
Hot extension test
Mechanical properties of sheath
Tensile test before aging
Tensile test after air oven aging
4.3 Tensile test after oil immersion
4.4 Hot extension test
Mechanical strength of finished cable
Flexing test and after test
Water immersion voltage test
The test voltage of 2-core finished cable is 2000V
For For cables with more than 2 cores
Insulation thickness is 0.6mm or less
The test voltage of the insulation core is 1500V
Insulation thickness is greater than 0.6mm
The test voltage of the insulation core is 2000V
Low temperature test
YQW|YZ.YZBYZW,YZWE
300/300V
300/500V
YC YCW
450/750V
Test method
2.1 of GB 5013.2—1997
2.3 of GB 5013.2—1997bZxz.net
2.3 of CB5013.2—1997
2.3 of GB5013.2—1997
2.2 of GB5013.2—1997
2.2 of GB5013.2—1997
Normal visual inspection and manual test
1 of GB 5013. 2---1997 9
1.10 of GB5013.2—1997
1.11 of GB5013.2-1997
1.11 of GB5013.2-1997
9.1 of GB/T 2951.1—1997
4 of GB5013.2-1997
GB 5013.2—1997的4
GB/T 2951.5—1997的9
GB/T 2951.1—1997的9. 2
GB/F2951.2—1997的8. 1. 3. 1 and
GB/T2951.1—1997的9.2
GB/T 2951.5—1997的10
GB/T 2951.5-—1997的9
GB 5013.2—1997的3.1
GB 5013.2—1997的3.1
GB 5013.2-1997的3. 1
Inspection items
Sheath bending test
Sheath elongation test 1
Marking abrasion test
JB 8735.2—1998
Table 8 (end)
Test type
YZ.YZBYZW.YZWE
300/300V
1) Only applicable to cables with an outer diameter exceeding the limit specified in this test method. 52
300/500V
450/750V
Test method
82 of GB/T2951.4—1997
8.4 of GB/T2951.4—1997
8.1 of GB5013.2—1997
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