This part specifies in detail the technical requirements for polyvinyl chloride flexible cables (cords) with rated voltages up to and including 300/500V. All cables shall comply with the corresponding requirements specified in GB 5023.1, and cables of various types shall comply with the special requirements specified in this part. GB 5023.5-1997 Polyvinyl chloride insulated cables with rated voltages up to and including 450/750V Part 5: Flexible cables (cords) GB5023.5-1997 Standard download decompression password: www.bzxz.net

1 General
1.1 Scope
National Standard of the People's Republic of China
Polyvinyl chloride insulated cablesof rated voltages up to and Including 450/750 VPart 5:Flexible cables (cords)GB 5023- 5—1997
1dt IEC 227-5: 1979
Amendment No. 1:1987
Amendment No. 2: 1994
Replaces GB5023.3—85
Part 5 of this standard specifies in detail the technical requirements for polyvinyl chloride flexible cables (cords) of rated voltages up to and including 300/500 V. All cables shall comply with the corresponding requirements specified in GB5023.1, and various types of cables shall comply with the special requirements specified in this part.
1.2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this 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/T2951.1—1997 General test methods for cable insulation and sheath materials Part 1: General test methods
Section 1: Measurement of thickness and overall dimensions
- Mechanical properties test
GB/T 2951.2—1997
General test methods for cable insulation and sheath materials Part 1: General test methods
Section 2: Thermal aging test methods
General test methods for cable insulation and sheath materials GB/T 2951. 4—1997
Part 1: General test methods
Section 4: Low temperature test
General test methods for cable insulation and sheath materials GB/T 2951.61997
Part 3: Special test methods for polyvinyl chloride mixtures Section 1: High temperature pressure test - cracking resistance test GB/T2951.7-1997 General test methods for cable insulation and sheath materials Part 3: Special test methods for polyvinyl chloride mixtures Section 2: Weight loss test - thermal stability test GB/T3956-1997 Cable conductors
GB 5023.1-1997
Vinyl chloride insulated cables with rated voltages of 450/750V and below Part 1: General requirements
GB 5023.2-1997
Polyvinyl chloride insulated cables with rated voltages of 450/750V and below Approved by the State Administration of Technical Supervision on July 30, 1997 and implemented on September 1, 1998
GB 5023. 5—1997
Part 2: Test methods
GB/T12666.2—90 Fire test methods for wires and cables Part 2: Vertical fire test methods for single wires and cables 2 Flat copper-covered flexible wires
2.1 Model
227IEC41(RTPVR).
2.2 Rated voltage
300/300 V.
2.3 Structure
2.3.1 Conductor
Number of cores: 2 cores.
Each conductor shall consist of multiple strands of twisted or complex strands, and each strand shall consist of one or more flattened copper wires or copper alloy wires spirally wound on a rope made of cotton yarn, amide rope or similar materials. The conductor resistance shall not be greater than the value specified in column 5 of Table 1. 2.3.2 Insulation
The insulation extruded on each conductor shall be a PVC/D-type polyvinyl fluoride mixture. The insulation thickness shall conform to the value specified in column 1 of Table 1. The insulation resistance shall not be less than the value specified in column 4 of Table 1. 2.3.3 Insulated core cabling
The conductors shall be placed in parallel and extruded with insulation.
There shall be a groove on both sides of the insulation between the conductors to facilitate separation of the insulated cores. 2.3.4 Dimensions
The average dimensions shall be within the limits specified in columns 2 and 3 of Table 1. 2.4 Tests
Compliance with the requirements of 2.3 shall be checked by the tests and tests specified in Table 2. 2.5 Guidelines for use
In normal use, the maximum conductor temperature is 70°C. Note: Other guidelines are under consideration.
Table 1227 Comprehensive data of IEC41 (RTPVR) type flexible wire Insulation thickness specified value
Electrical performance test
Conductor resistance
Average overall dimensions
2-2×4-4
3. 5×7. 0
Minimum insulation resistance at 70C
Table 227 Test items for IEC41 (RTPVR) type flexible wire Test items
Finished cable 2000V voltage test
Continuous insulation resistance at 70C
Structural dimension inspection
Test type
Maximum conductor resistance at 20C
Test method
GB (GB/T)
5023. 1 and 5023. 2
Article number
Structural inspection
Insulation thickness measurement
Dimension measurement
Insulation mechanical properties
Tensile test before aging
Tensile test after aging
Weight loss test
High temperature pressure test
Low temperature elasticity
Insulation low-temperature bending test
Thermal shock test
Test items
Mechanical strength of finished cable
Bending test
Load breaking test
Non-flame retardation test
3 Flat non-sheathed flexible cord
3.1 Model
227 IEC 42 (RVB).
3.2 Rated voltage
300/300 V.
3.3 Structure
3.3-1 Conductor
Core: 2 cores,
GB 5023. 5-1997
Table 2 (end)
Test type
Conductors shall comply with the requirements of the 6th conductor specified in GB/T3956. 3.3-2 Insulation
The insulation extruded on each core conductor shall be a PVC/D-type polyvinyl chloride mixture. The insulation thickness shall comply with the value specified in the second column of Table 3. The insulation resistance shall not be less than the value specified in the fifth column of Table 3. 3.3.3 Insulated core cabling
Conductors shall be placed in parallel and extruded with insulation.
There shall be a groove on both sides of the insulation between the conductors to facilitate the separation of the insulated cores. 3.3.4 Overall dimensions
The average overall dimensions shall be within the limits specified in columns 3 and 4 of Table 3.3.3.4 Tests
The inspection and tests specified in Table 4 shall be used to check whether the requirements of 3.3 are met. Test methods
GE (GB/T)
Article number
Inspection and manual T test
8. 1. 3. 1
3.5 Guidelines for use
In normal use, the maximum temperature of the conductor is 70'℃. Note: Other guidelines are under consideration.
GB 5023. 51997
Table 3227Comprehensive data of IEC42 (RVB) type flexible wireConductor nominal cross section
Electrical performance test
Conductor resistance
Specified value of insulation thickness
Average overall dimensions
2.5×5. 0
3. 0×6. 0
3-2×6.4
Table 4227 Test items for IEC42 (RVB) type flexible cordTest items
2000V voltage test on insulated core
2000V voltage test on finished cable
Insulation resistance at 70℃
Structural dimension inspection
Structural inspection
Insulation thickness
Dimension measurement
Insulation mechanical properties
Tensile test before aging
After aging Tensile test
Weight loss test
High temperature pressure test
Low temperature elasticity and impact strength
Insulation low temperature bending test
Insulation low temperature impact test
Thermal shock test
Mechanical strength of finished cable
Flex test
Insulation core tearing test
Non-flame retardation test
4 Indoor decorative open circuit soft wire
4.1 Model
227 IEC 43 (SVR)
2 Rated voltage
Test type
Minimum insulation resistance at 70℃
Ma·km
Test method
GB (GE/T)
5023.1 and 5023-2
2951- 2
2951-7
Article number
Inspection and manual test
B- 1. 3. 1
300/300 V.
4.3 Structure
4. 3. 1 Conductor
Number of cores: 1 core.
GB 5023.5—1997
The conductor shall comply with the requirements for the 6th conductor specified in GB/T 3956. 4.3.2 Insulation
The insulation shall be a PVC/D-type polyvinyl nitrile mixture. The insulation shall consist of two layers and shall be extruded over the conductor simultaneously. The color of the outer layer of insulation shall be in sharp contrast to the inner layer and shall be bonded to the inner layer of insulation. The combined thickness of the inner and outer layers of insulation shall conform to the values ​​specified in columns 3 and 4 of Table 5, and the thickness of each layer of insulation at any point shall not be less than the value specified in column 2.
The insulation resistance shall not be less than the value specified in column 6 of Table 5. 4.3.3 Identification of flexible cords
The preferred color of the outer layer is green.
4.3.4 Outside diameter
The average outside diameter shall not be greater than the upper limit specified in column 5 of Table 5. 4.4 Tests
Compliance with the requirements of 4.3 shall be checked by the tests and tests specified in Table 6. 4.5 Guidelines for use
In normal use, the maximum conductor temperature is 70°C. Note: Other guidelines are under consideration.
Table 5227Comprehensive data of IEC43 (SVR) type cableConductor
Nominal cross section
Thickness of each insulation layer
Minimum value
Total insulation thickness
Minimum value
Total insulation thickness
Average value
Average outer diameter
Table 6227Test items of IEC43 (SVR) type cableTest items
Electrical performance test
Conductor resistance
Finished cable 2000V voltage test
Insulation resistance at 70℃ (Note)
Structural dimension inspection
Structural inspection
Inner insulation thickness measurement (only check the minimum thickness) Outer insulation thickness measurement (only check the minimum thickness) Total thickness measurement (Note)
Outer diameter measurement
Insulation mechanical properties
Tensile test before aging (Note)
Tensile test after aging (Note)
Test type
Minimum insulation resistance at 70℃
Mn·km
Test method
GB(GB/T)
5023. 1 and 5023. 2
Article number
Inspection and manual test
8. 1. 3.1
Weight loss test (Note)
Test items
High temperature pressure test (forward)
Low temperature elasticity
Low temperature bending test (Note)
Thermal shock test (Note)
Non-flame retardation test
GB 5023.5—1997
Table 6 (end)
Test type
Test method
GB(GB/T)
2951-4
Note: Because the double-layer insulation is extruded with the same material at the same time, the combined insulation should be tested and evaluated as one layer of insulation. 5 Light polyoxyethylene sheathed flexible cord
5.1 Model
227 IEC 52(RVV).
5.2 Rated voltage
300/300 V.
5.3 Structure
5.3. 1 Conductor
Number of cores: 2 and 3 cores. The conductor should meet the requirements of the 5th conductor specified in GB/T 3956. 5.3.2 Insulation
The insulation extruded on each conductor shall be a mixture of PVC/D-type polyvinyl chloride. The insulation thickness shall comply with the value specified in column 2 of Table 7. The insulation resistance shall not be less than the value specified in column 6 of Table 7. 5.3.3 Insulated core cabling
Round flexible cord: the insulated cores shall be twisted together, flat flexible cord: the insulated cores shall be placed in parallel. 5.3.4 Sheath
The sheath extruded on the insulated cores of the cabling shall be a mixture of PVC/ST5 type polyvinyl chloride. The thickness of the sheath shall comply with the value specified in column 3 of Table 7. Article number
The sheath is allowed to fill the gaps between the insulated cores and constitute a filling, but shall not adhere to the insulated cores. The insulated cores are allowed to be covered with an isolation layer after cabling, and shall not adhere to the insulated cores.
The finished round flexible cord shall actually be a round cut surface. 5.3.5 Overall dimensions
The average outer diameter of round flexible cords and the average overall dimensions of flat flexible cords shall be within the limits specified in columns 4 and 5 of Table 7. 5.4 Tests
Compliance with the requirements of 5.3 shall be checked by the tests and tests specified in Table 8. 5.5 Guidelines for use
In normal use, the maximum temperature of the conductor is 70°C. Note: Other guidelines are under consideration.
Number of conductor cores and nominal dispersion
Electrical performance test
Conductor resistance
GB 5023. 5—1997
Table 7 227 Comprehensive data of IEC52 (RVV) type flexible cord Insulation thickness
Specified value
Sheath thickness
Specified value
Average overall dimensions
Table 8 227 Test items for IEC52 (RVV) type flexible cord Test items
1500V voltage test on insulated core
2000V voltage test on finished cable
Insulation resistance at 70℃
Structural dimension inspection
Structural inspection
Insulation thickness measurement
Sheath thickness measurement
Overall dimensions measurement
Average value
Ellipse
Insulation mechanical properties
Aging Pre-tension test
Tension test after aging
Weight loss test
Sheath mechanical properties
Tension test before aging
Tension test after aging
Weight loss test
High temperature pressure test
Low temperature elasticity and impact strength
Low temperature bending test for insulation
Low temperature bending test for sheath
Low temperature impact test for finished cable
Test type
Minimum insulation resistance at 70°C
MO·km
GB(GB/T)
5023.1 and 5023.2
2951-2
Article number
Inspection and manual test
8. 1.3.1
Thermal shock test
Test items
Mechanical strength of finished cable
Flex test
Non-flame retardation test
6 Ordinary polyvinyl sheathed flexible cord
6.1 Model
227 IEC 53 (RVV).
6-2 Rated voltage
300/500 V.
6.3 Structure
6.3.1 Conductor
Number of cores: 2, 3, 4 or 5 cores.
GB 5023. 5—1997
Table 8 (end)
Test type
The conductor shall meet the requirements of the fifth conductor specified in GB/T 3956. 6.3.2 Insulation
The insulation extruded on each core conductor shall be a mixture of PVC/D-type polyvinyl chloride. The insulation thickness shall comply with the value specified in column 2 of Table 9. The insulation resistance shall not be less than the value specified in column 6 of Table 9. 6.3.3 Insulated core and filler (if any) together form a continuous round flexible cord: the insulated core and filler (if any) shall be twisted together Flat flexible cord: the insulated cores shall be placed in parallel. Test method
GB(GB/T)
2951-6
12656-2
For two-core round flexible cords, the gap between the insulated cores may be filled alone or with a sheath. Any filler shall not adhere to the insulated core. 6.3.4 Sheath
The sheath extruded on the insulated core shall be a mixture of PVC/ST5-type polyvinyl chloride. The sheath thickness shall comply with the value specified in column 3 of Table 9. Article number
The sheath is allowed to fill the gaps between the insulating cores and constitute a filling, but it should not adhere to the insulating cores. The insulating cores are allowed to be wrapped with an isolation layer after being cabled, and they should not adhere to the insulating cores.
The finished round flexible cable should actually have a circular cross-section. 6-3.5 Overall dimensions
The average outer diameter of the round flexible cable and the average overall dimensions of the sector-shaped flexible cable should be within the limits specified in columns 4 and 5 of Table 9. 6.4 Tests
Compliance with the requirements of 6.3 should be checked by the tests and tests specified in Table 10. 6. 5 Guidelines for use
In normal use, the maximum temperature of the conductor is 70'℃. Note: Other guidelines are under consideration.
Number of conductor cores and nominal cross-section
Electrical performance test
Conductor resistance
GB 5023.5—1997
Table 9227Comprehensive data of IEC53 (RVV) type flexible cordInsulation thickness
Specified value
Sheath thickness
Specified value
Average overall dimensions
Limit Upper limit
3.8×6. 0
227Test items for IEC53 (RVV) type flexible cordTest item
Insulated core is subjected to voltage test according to the specified insulation thickness1 500 V for 0.6 mm and below
2 000 V for greater than 0.6 mm V
Finished cable 2000V voltage test
Insulation resistance at 70℃
Structural dimensions
Structural inspection
Insulation thickness measurement
Sheath thickness measurement
Dimension measurement
Average value
Ellipsometric degree
Insulation mechanical properties
Tensile test before aging
Tensile test after aging
Test type
Minimum insulation resistance at 70℃
Mn·km
Test method
GB(GB/T)
5023.1 and 5023. 2
5023-1
Article number
Inspection and manual test
6-1.3. 1
Weight loss test
Mechanical properties of sheath
Tensile test before aging
Tensile test after aging
Weight loss test
Non-pollution test
High temperature pressure test
Test items
Low temperature elasticity and impact strength
Low temperature bending test for green insulation
Low temperature bending test for sheath
Low temperature impact test for finished cable
Thermal shock test
Mechanical strength of finished cable
Bending test
Non-flame retardation testbZxz.net
GB 5023. 5—1997
Table 10 (end)
Test type
Test method
GB(GB/T)
2951-6
Article number
B. 1. 3. 1
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