Part 4 of this standard specifies in detail the technical requirements for lightweight PVC sheathed cables with a rated voltage of 300/500V. All cables shall comply with the corresponding requirements specified in GB 5023.1 and the special requirements of this part. GB 5023.4-1997 Polyvinyl chloride insulated cables with rated voltages of 450/750V and below Part 4: Sheathed cables for fixed wiring GB5023.4-1997 Standard download decompression password: www.bzxz.net

1 General Provisions 1.1 Scope National Standard of the People's Republic of China Polyvinyl chloride insulated cables of rated voltages up to and including 450/750 V Part 4: Sheathed cables for fixed wiring GB 5023.4—1997 IEC227-4:1992 Replaces GB5023.2—85 Part 4 of this standard specifies in detail the technical requirements for light polyvinyl fluoride sheathed cables with rated voltage of 300/500 V. All cables shall comply with the corresponding requirements specified in GB5023.1 and the special requirements of this part. 1.2 Cited standards
The clauses contained in the following standards constitute the clauses of this standard through reference in this standard. When this standard was published, the versions shown were valid. All standards are subject to revision. Parties using this standard should investigate the possibility of using the latest versions of the following standards. General test methods for cable insulation and sheathing materials GB/T 2951.1—1997
Part 1: General test methods
Section 1: Measurement of thickness and overall dimensions - Mechanical properties test GB/T 2951.2—1997
GB/T 2951-4—1997
GB/T 2951. 6-—1997
GB/T 2951.7—1997
GR/T 3956--1997
General test methods for cable insulation and sheath materials Part 1: General test methods
Section 2: Heat aging test methods
General test methods for cable insulation and sheath materials Part 1: General test methods
Section 4: Low temperature test
General test methods for cable insulation and sheath materials Part 3: Special test methods for polyvinyl chloride mixtures Section 1: High temperature pressure test-cracking resistance test 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 Cable conductors
GB5023.1-1997 Polyvinyl chloride insulated cables with rated voltages of 450/750V and below Part 1: General provisions
GB 5023. 21997
Polyvinyl chloride insulated cables with rated voltages up to and including 450/750V Part 2 Test methods
Approved by the State Administration of Technical Supervision on July 30, 1997 and implemented on September 1, 1998
GB 5023. 4—1997
GB/T12666.2—90 Fire test methods for wires and cables Part 2, Vertical fire test methods for single wires and cables 2 Lightweight fluoroethylene sheathed cables
2.1 Model
227 IEC 10 (BVV).
2.2 Rated voltage
300/500 V.
2.3 Structure
2.3.1 Conductor
Number of cores: 2, 3, 4 or 5 cores.
The conductor shall meet the requirements specified in GB/T 3956. The first type is used for solid conductors and the second type is used for
-stranded conductors.
2.3.2 Insulation
The insulation extruded on the conductor shall be a PVC/C-type polyvinyl chloride mixture. The insulation thickness shall comply with the value specified in column 3 of Table 1. The insulation resistance shall not be less than the value specified in column 8 of Table 1. 2.3.3 Cabling of insulated cores
The insulated cores shall be twisted together.
2.3.4 Inner sheath
An inner sheath composed of a non-vulcanized rubber or plastic mixture shall be extruded on the twisted insulated cores. The inner sheath and the insulated core shall be easily separated. 2.3.5 Sheath
The sheath extruded on the inner sheath shall be a PVC/ST4-type polyvinyl chloride mixture. The sheath shall fit tightly with the inner sheath and be easy to peel off without damaging the inner sheath. The sheath thickness shall comply with the value specified in column 5 of Table 1. 2.3.6 Outside diameter
The average outside diameter shall be within the limits specified in columns 6 and 7 of Table 1. 2.4 Tests
Compliance with the requirements of 2.3 shall be checked by the tests and inspections 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.
227 General data of IEC10 (BVV) type cable Number of conductor cores
Nominal cross-section
Conductor type
Insulation thickness
Specified value
Inner sheath thickness
Approximate value
Sheath thickness
Specified value
Average outer diameter
Minimum at 70℃
Interruption resistance
Number of conductor cores
Nominal grain surface
Conductor type
Insulation thickness
Specified value
GB 5023.4—1997
Table 1 (continued)
Inner sheath thickness
Approximate value
Sheath thickness
Specified value
Average outer diameter
Minimum
Insulation circumference at 70℃
Mn·km
Number of conductor cores
Nominal cross section
Conductor type
Electrical performance test
Insulation thickness
Specified value
GE 5023. 4—1997
Table 1 (end)
Inner sheath thickness
Approximate value
Sheath thickness
Specified value
Average outer diameterbZxz.net
Table 227Test items for IEC10 (BVV) type cableTest items
Conductor resistance
2000V voltage test for core
2000V voltage test for finished cable
70 ℃ insulation resistance
Structural dimension inspection
Structural inspection
Insulation thickness measuring plate
Sheath thickness measurement
Outer diameter measurement
Average value
Rare degree
Insulation mechanical properties
Tensile test before aging
Tensile test after aging
Weight loss test
Sheath mechanical properties
Tensile test before aging
Tensile test after aging
Weight loss test
Non-fouling 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 tensile test for sheath
Low temperature impact test for finished cable
Thermal shock test
Test type
Minimum
Brilliant green resistance at 70℃
MD·km
Test method
GB(GE/T)
5023-1 and 5023.2
2951-4
Article number
Inspection and manual test
B. 1.3.1
Non-flame-extending test
Test items
GB5023.4—1997
Table 2 (end)
Test type
1) Applicable only when the outer diameter of the electrode exceeds the limit value specified in the test method. Test
GB(GB/T)
2951-6
Article number
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