JB 8734.1-1998 Polyvinyl chloride insulated cables, wires and cords of rated voltage 450/750V and below Part 1: General provisions
Some standard content:
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 in the domestic market and export trade. 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
Polyvinyl chloride insulated cables, wires and cordsof rated voltages up to and including 450/750VPart 1: General requirementsJB 8734.1—1998
This standard specifies the product structure of polyvinyl chloride insulated cables, wires and cords of rated voltages up to and including 450/750V, general technical requirements, tests, acceptance rules, delivery length, marking and packaging of finished cables. This standard applies to polyvinyl chloride insulated cables, wires and cords with copper and aluminium conductors for power plants with rated voltages up to and including 450/750V. This standard includes PVC insulated cables, wires and cords of series B, R, A and their derivatives (shielded). The technical requirements of various types of cables, wires and cords are specified in the subsequent product standards JB8734.2, JB8734.3, JB8734.4 and JB8734.5. This standard should be used together with JB8734.2, JB8734.3, JB8734.4, JB8734.5 and other parts. 2 Reference standardsbzxZ.net
The provisions contained in the following standards become the provisions of this standard through reference in this standard: At the time of publication of the standard, 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 2900.10 — 84 | | tt | ||JB8734.2-1998
JB 8734.3-1998
JB8734.4-1998
JB8734.5-1998
Electrical terminology Wire and cable (eqvIEC50-446-1983) Common test methods for cable insulation and sheath materials (idtIEC811-1993) Polyvinyl chloride insulated cables with rated voltages of 450/750V and below (idtIEC227--3-1997) Digital rounding rules
Wire and cable combustion test methods Part 2: Single wire and cable vertical combustion test method (eqvIEC 332-1-1993)
Conductors of cables
Delivery trays for wires and cables
Polyvinyl chloride insulated cables, wires and cords of rated voltages up to and including 450/750V Part 2: Cables and wires for fixed wiring
Polyvinyl chloride insulated cables, wires and cords of rated voltages up to and including 450/750V Part 3: Flexible cords for connection
Polyvinyl chloride insulated cables of rated voltages up to and including 450/750V Wires and cords Part 4: Wires for installation
PVC insulated cables, wires and cords with rated voltages up to and including 450/750V Part 5: Shielded wires
When other standards must be cited, they shall be specified in the corresponding subsequent product standards. Approved by the Ministry of Machinery Industry on May 28, 1998
Implementation on November 1, 1998
3 Terms, symbols and codes
3.1 Terms
JB 8734. 1—1998
3.1.1 The terms and phrases of this standard shall be interpreted in accordance with CB2900.10. 3.1.2 Polyvinyl chloride mixtures
Polyvinyl chloride mixtures refer to materials whose special components are polyvinyl chloride or one of its copolymers after appropriate selection, proportioning and processing. This term can also be used to indicate a mixture containing polyvinyl chloride and a certain polyvinyl chloride polymer. 3.1.3 Test Types
3.1.3.1 Type Test (Symbol T)
Type test refers to the test conducted on a type of cable specified in this standard before delivery according to general commercial principles to prove that the relay has good performance and can meet the specified use requirements. The essence of type test is that after these tests are conducted, they do not need to be repeated. If the change of cable material or design will affect the performance of the cable, it must be repeated. 3.1.3.2 Sampling Test (Symbol S)
Sampling test is a test conducted on a sample of finished cable or on a component taken from a finished cable to prove that the product meets the design specifications. 3.1.3.3 Routine Test (Symbol R)
Routine test refers to the test conducted by the manufacturer on all finished cables. 3.1.4 Rated Voltage
Rated voltage is the reference voltage for cable design and electrical performance testing. Rated voltage is represented by U./U, and the unit is V.U. is the effective value of the voltage between any phase conductor and the ground (metal shield, metal sheath or surrounding medium). U is the effective value of the voltage between any two phase conductors of a multi-core cable or single-core cable system. When used in an AC system, the rated voltage of the relay shall be at least equal to the nominal voltage of the cable system in use. This condition applies to both U and U values.
When used in a DC system, the nominal voltage of the system shall not be greater than 1.5 times the rated voltage of the cable. Note: The cumulative working voltage of the system is allowed to exceed 10% of the nominal voltage of the system for a long time. If the rated voltage of the cable is at least equal to the nominal voltage of the system, the cable can be used at a working voltage 10% higher than the rated voltage. 3.2 Symbols and codes
3.2.1 Classification by purpose (and indicating series)
Fixed wiring cables (wires) .·.
Soft wires for connection
Wires for installation:
3.2.2 Classification by material characteristics
Copper conductor
Aluminum conductor
Insulation PVC,
Sheath PVC
3.2.3 Classification by structural characteristics
Flat type (flat type)
Twisted pair type
Braided shield type
Twisted shield type
Soft structure
·Omitted
3.2.4 Classification by heat resistance characteristics
3.3 Product indication method
JB 8734. 11998
·Omitted
3.3.1 Products are indicated by model, specification and standard number. Specifications include rated voltage, number of cores and nominal conductor cross-section. 3.3.2 When the same model, variety and specification adopt different specified conductor structures, the harder (Class 1) conductor is indicated by (A) and the softer (Class 2) conductor is indicated by (B), which is indicated after the specification. 3.3.3 The yellow/green ground wire in multi-core cable should be indicated separately from other cores. 3.3.4 The color of the cable, if necessary, should be indicated after the specification. 3.3.5 Examples
a) Copper core, PVC insulated, PVC sheathed flat cable, for fixed wiring, rated voltage 300/500V, 2 cores, 4mm2, harder conductor (Class 1) structure is represented by: BVVB-300/500
Softer conductor (Class 2) structure is represented by 12X4 (A) JB8734.2-1998
BVVB--300/500
2×4 (B) JB8734.2-1998
b) Copper core, PVC insulated, PVC sheathed flexible cable for installation, rated voltage 300/300V, 10 cores, 0.4mm2, with yellow/green combination ground wire is expressed as:
AVVR—300/300
Those without yellow/green combination ground wire are expressed as:
9X0.4+1X0.4
AVVR—300/300
JB 8734.4-1998
JB 8734.4—1998
c) Copper core polyvinyl chloride insulated shielded soft wire, rated voltage 300/300V, heat resistant 90℃, single core, 0.5mm2, blue, expressed as.
RVP—90
4 General requirements for cable structure
4.1 Conductor
4.1.1 Material
300/300
JB8734.5-1998
The copper conductor shall be annealed round copper wire. The single wire in the conductor may be a round pot wire without tinning or tinning. Aluminum conductors of 6mm2 and below shall be hard round aluminum wires in H4 state, and those of 10mm2 and above shall be hard round aluminum wires in H4 state or soft round aluminum wires in 0 state.
4.1.2 Structure
The minimum number of single wires in hard conductors and the maximum diameter of single wires in soft conductors shall comply with the requirements of GB/T3956 or the provisions in subsequent product standards.
The conductor of fixed wiring cables shall be round solid, round stranded or compact round stranded conductors. 4.1.3 Structural inspection
The structure should be inspected by testing and measurement and should comply with the requirements of 4.1.1, 4.1.2 of this standard and GB/T3956 or the provisions in subsequent product standards.
4.1.4 Resistance
The resistance of each core conductor of the cable at 20°C should comply with the corresponding requirements specified in GB/T3956 or the provisions in subsequent product standards. 4.2 Insulation
4.2.1 Material
The insulation polyvinyl chloride mixture codes are as follows: PVC/C - Mainly used for B and A series products
PVC/D - Mainly used for R series products
PVC/E - Mainly used for 90°C products
The mechanical and physical properties are as specified in Table 1.
JB 8734.1—1998
Table 1 Mechanical and physical properties of insulating polyvinyl chloride No.
Test item
Tensile strength and elongation at break
Delivery status Original properties
1.1.1 Tensile strength:
—Minimum intermediate value
1.1.2 Elongation at break,
—Minimum intermediate value
Performance after air oven aging
Aging conditions,
—Temperature
—Treatment time
Tensile strength
—Minimum intermediate value
—Maximum rate of change 11
Elongation at break
Minimum intermediate value
—Maximum rate of change 1
Weight loss test
Aging conditions:
—Temperature
|-Processing time
Maximum value
Thermal shock test
Test conditions
-Temperature
-Processing time
Test results
High temperature pressure test
Test conditions:
-Pressure applied on the knife edge
Heating time under load
-Temperature
Test results:
-Maximum intermediate value of indentation depth
Low temperature Liqu test
Test conditions:
-Temperature
mg/em2
Mixture code
PVC/C|PVC/DPVC/E
Test method
9.1 of GB/T2951.1—1997
150±2
7× 24
135±2
10×24
150±2
No cracking
115±2
10×24
150±2
See 8.1.4 in GB/T2951.6
See 8.1.5 in GB/T2951.6
170±2
—15±2
—15±2
—15±2
8.1.3.1 of GB/T2951.2—1997 and
9.1 of GB/T 2951.1—1997
GB/T 2951.7—1997, 8.1
GB/T 2951.6—1997, 9.1
CB/T 2951.6-1997, 8.1
GB/T 2951.41997, 8.1
Test items
Applied low temperature time
Test results:
Low temperature tensile test
Test conditions.
one temperature
one low temperature application time
Test results:
one minimum elongation
low temperature impact test
Test conditions
one temperature
one low temperature application time
drop weight
Test results:
Thermal stability test
Test conditions:
one temperature
8.2! Test results
-Minimum average thermal stability time
JB 8734.11998
Table 1 (end)
Mixture code
See 8.1.4 and 8.1.5 in GB/T2951.4
No cracking
-15±2
-15±2
See 8.3.4 and 8.3.5 in GB/T2951.4
-15±2|—15±2
See 8.5.5 of GB/T2951.4
See 8.5.4 of GB/T2951.4
See 8.5.6 of GB/T2951.4
Test method
8.3 of GB/T2951.4—1997
8.5 of GB/T2951.4—1997
9 of GB/T2951.7—1997
1) Rate of change: The ratio of the difference between the median value after aging and the median value before aging to the median value before aging, expressed as a percentage. 4.2.2 Extruded
The insulation shall be tightly extruded on the conductor and shall be easily stripped without damaging the insulation, conductor or tinned layer (if any). The surface of the insulation shall be flat and uniform in color.
4.2.3 Thickness
The average value of the insulation thickness shall not be less than the specified value of various types and specifications of cables listed in the subsequent product standard table, and the thickness of the thinnest point shall not be less than 90~0.1mm of the specified value. The thickness measurement result shall be rounded to one decimal place in accordance with the provisions of GB8170. 4.2.4 Mechanical properties before and after aging
Insulated polyvinyl chloride shall have sufficient mechanical strength and elasticity within the normal operating temperature range. It shall be inspected and meet the corresponding requirements according to the tests specified in Table 1. 4.2.5 Identification of insulated cores
Each insulated core shall be identified according to the following rules: Color identification is preferred for cables with 5 cores or less, and digital identification is also allowed; digital identification is preferred for cables with more than 5 cores, and color identification is also allowed. The recommended color spectrum is shown in 4.2.5.1.2 of this standard. 4.2.5.1 Color identification method of insulated core 4.2.5.1.1 General requirements
The insulated core of the relay shall be identified by colored insulation or other appropriate methods. Except for the yellow/green combination color, each insulated core of the cable shall only use one color.
JB 8734. 11998
The yellow/green combination color is the color of the grounding core. When there is a yellow/green combination grounding insulated core in the insulated core of the cable, green and yellow are not allowed to be used for other insulated cores.
4.2.5.1.2 Color spectrum
Preferred color spectrum for flexible cables and single-core cables is: - Single-core cables have no preferred color spectrum;
- Two-core cables have no preferred color spectrum;
Note: The insulated cores of unsheathed two-core parallel flexible cables do not need to be identified. - Three-core cables are yellow/green, light blue, brown, or light blue, black, brown; - Four-core cables are yellow/green, light blue, black, brown, or light blue, black, brown, black or brown; - Five-core cables are yellow/green, light blue, black, brown, black or brown, or light blue, black, brown, black or brown, black or brown.
- Cables with more than five cores
In the outer layer, one core is yellow/green, one core is light blue, and the other cores are the same color, but not green, yellow, light blue or brown; in other layers, one core is brown, and the other cores are the same color, but not green, yellow, light blue or brown. Or in the outer layer, one core is light blue, one core is brown, and the other cores are the same color, but not green, yellow, light blue or brown: in other layers, one core is brown, and the other cores are the same color, but not green, yellow, light blue or brown. Each color should be clearly identifiable and resistant to abrasion. It should meet the requirements when tested according to the test method specified in 1.8 of CB5023.2-1997. 4.2.5.1.3 Yellow/green combination color
The color distribution of the yellow/green combination color insulated core should meet the following conditions: For each 15mm long insulated core, one color should cover at least 30% of the surface of the insulated core. And not more than 70%, while the other color covers the rest of the insulated core: Note, explanation on the use of yellow/green combination color and light blue: When the yellow/green combination color is used according to the above provisions, it means that it is specially used to identify the insulated core connected to the ground or similar protection purpose, and the light blue is used as the insulated core connected to the neutral line. If there is no neutral conductor, light blue may be used to identify any insulated conductor except the grounding or protective conductor. 4.2.5.2 Digital Identification of Insulated Conductors
4.2.5.2.1 General Requirements
The insulation shall be of the same color and arranged in numerical order, except for yellow/green combination insulated conductors (if any). If there are yellow/green insulated conductors, they shall comply with the requirements of 4.2.5.1.3 of this standard and shall be placed on the outer layer. The digital numbering shall start from 1 on the inner layer and be arranged in a clockwise direction. The numbers shall be printed on the outer surface of the insulated conductors in Arabic numerals. The numbers shall be the same color and have a clear color difference from the insulation color. The Arabic numerals must be legible.
4.2.5.2.2 Arrangement of Marks
The digital markings shall be repeated at equal intervals along the insulated conductor, and the two adjacent groups of digital markings shall be reversed. When the marking consists of a single number, the dash shall be placed below the number. If the mark is composed of two numbers, one number is placed below the other number, and a dash is added under the lower number. The distance d between two adjacent complete digital marks should not exceed 50mm.
The arrangement of the marks is shown in the following figure:
4.2.5.2.3 Abrasion resistance
JB 8734. 1—1998
The digital mark should be resistant to abrasion and should meet the requirements in accordance with the test method specified in 1.8 of GB5023.2-1997. 4.3 Filling
4.3.1 Material
Unless otherwise specified in the subsequent product standards, the filler should be composed of one or any combination of the following materials: - Plastic mixture:
- Natural or synthetic textile fiber:
4.3.2 Covering
The gap between the cabled wires is allowed to be filled with fillers or sheaths embedded between the insulated wire cores, which shall be specified in the subsequent product standards. The filler should fill the gaps between the insulated cores to form a practically circular shape. The filler should not adhere to the insulated cores. It is allowed to use a film or tape to tie the cable cores and fillers together. 4.4 Shielding
4.4.1 Materials
The shielding layer of the shielded cable should be braided or wound with annealed soft round copper wire or tinned soft round copper wire. It is allowed to wrap a layer of film around the cable before or (and) after the shielding is applied. 4.4.2 Weaving density
The weaving (or winding) density of the shielding layer is expressed as a percentage and is calculated according to the following formula: k=(mnd/2 1)[1 +(1/ D)2J/
k=(2 kt-k)×100%
Wherein: k-weaving density,%.
kOne-way coverage factor:
1Pitch, mm
d-diameter of single metal round wire for shielding, mmD-diameter of shielding layer, mm
m-total number of threads;
n-number of threads per thread.
4.5 Sheath
4.5.1 Material
The code of the polyvinyl chloride mixture for the sheath is as follows: PVC/ST4--mainly used for B and A series products PVC/ST5-
mainly used for R series products
Its mechanical and physical properties should comply with the requirements of Table 2
4.5.2 Extrusion
The sheath is single-layer extruded. When
a) for single-core cables, it is extruded on the insulating core; when
b) for other cables, it is extruded on the cable core and (or) filler or inner sheath (if any). The sheath should be easy to peel off without damaging the insulation. The surface of the sheath should be flat and the color should be uniform. 4.5.3 Thickness
The average value of the sheath thickness should not be less than the specified value of each type and specification of cable listed in the subsequent product standard table, and the thickness at the thinnest point should not be less than 85% of the specified value~0.1mm. The thickness measurement result shall be rounded to one decimal place in accordance with the provisions of GB8170. 4.5.4 Mechanical properties before and after aging
JB 8734.1—1998
The sheathed PVC shall have sufficient mechanical strength and elasticity within the normal operating temperature range. It should be inspected and tested according to the test specified in Table 2 and meet the corresponding requirements. Table 2 Mechanical and physical properties of sheathed polyvinyl chloride No.
Test item
Tensile strength and elongation at break
Original performance in delivery state
Tensile strength:
-Minimum intermediate value
Elongation at break,
-Minimum intermediate value
Performance after aging in air oven
Aging condition 1
-Temperature
-Processing time
Tensile strength
-Minimum intermediate value
-Maximum change rate 13
Elongation at break
-Minimum intermediate value
-Maximum change rate 1
Weight loss test
Aging condition 1
-Maximum value
Heat shock test
Test conditions
-Processing time
Test results
High temperature pressure test
Test conditions:
-Pressure applied on the blade
-Heating time under load
-Temperature
Test results:
-Maximum median value of indentation depth
Low temperature bending test
Test conditions,
-Temperature
-Applied low channel time
Test results
Low temperature tensile test
Mixture code
PVC/ST4
150±2
No cracking
PVC/ST5
Test method
GB/T 2951.1—1997, 9.2
See 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
GB/T 2951. 6—1997
150±2
8.2 of GB/T 2951.6-1997
See 8.2.4 of GB/T 2951.6
See 8.2.5 of GB/T 2951.6
—15±2
GB/T 2951.4-1997, 8.2
—15±2
See 8.2.3 in GB/T 2951.4
No cracking
8. 4 of GB/T 2951.4-1997
Test items
Test conditions,
-temperature
-apply low temperature time
Test results
-minimum elongation
Low temperature impact test
Test conditions:
-temperature
-apply low temperature time
-drop weight
Test results
JB 8734.1—1998
Table 2 (end)
Mixture code
PVC/ST4PVC/ST5
—15±2
See 8.4.4 in GB/T 2951.4
—15±2
—15±2
See 8.5.5 in GB/T 2951.4
See 8.5.4 in GB/T 2951.4
See GB/T 8.5.6 in 2951.4
Test method
8.5 in GB/T2951.4-1997
1) The rate of change is the ratio of the difference between the median value after aging and the median value before aging to the median value before aging, expressed as a percentage. 4.6 Marking
4.6.1 Origin marking and cable identification
The cable should have the manufacturer's name, product model or the manufacturer's name, product model and rated voltage continuous markings. The manufacturer's name marking is a repeated mark of the manufacturer's name or trademark.
The marking can be printed with ink or embossed on the insulation or sheath. 4.6.2 Marking continuity
The distance between the end of a complete mark and the beginning of the next mark, for a sheath, should not exceed 500mm
-insulation should not exceed 200mm
4.6.3 Abrasion resistance
Ink printed marks should be resistant to abrasion and should meet the requirements when tested according to the test method specified in 1.8 of GB5023.2-1997. 4.6.4 Clarity
All marks should be legible.
4.6.5 Special requirements for product marking shall be specified by subsequent product standards. 5 Finished cable tests
5.1 Electrical properties
The cable should have sufficient dielectric strength and insulation resistance and should be checked according to the tests specified in Table 3 to see if it meets the standard requirements. 5.2 Overall dimensions
The average outer diameter or overall dimensions of the cable shall comply with the provisions of subsequent product standards. The difference (ovality) between the outer diameters of any two points on the same cross section of a circular sheathed cable shall not exceed 15% of the upper limit of the average outer diameter. Measure two points and take the maximum difference.
5.3 Shielding braiding density
For single-core shielded wires with a nominal cross-section of 0.12mm2 or less, the shielding braiding (or winding) density shall not be less than 60%, and for other shielded wires, the shielding braiding (or winding) density shall not be less than 80%. 5.4 Insulation core tearing test
Two-core non-sheathed flat soft wires shall be subjected to insulation core tearing test. 10
JB 8734.1—1998
Take a sample of appropriate length, cut it along the groove on the insulation surface at one end, and use a tensile machine to measure the tearing force required to tear off the insulation at a speed of 5mm/s. It should be between 3 and 30N.
The insulated core after tearing off shall be subjected to the voltage test specified in Table 3. Table 3 Electrical properties of cable
Test items
Conductor resistance measurement
Test results
-Maximum value
Finished cable voltage test
Test conditions
-Minimum length of sample
-Minimum time immersed in water
-Water temperature
Test voltage (AC)
-Insulation thickness 0.6mm and below
Insulation thickness above 0.6mm
Minimum voltage application time each time
Test results
Insulation core voltage test
Test items,
-Sample length||tt ||- Minimum immersion time
- Water temperature
Test voltage (AC)
- Insulation thickness 0.6mm and below
- Insulation thickness above 0.6mm
Minimum voltage application time each time
Test results
Insulation resistance measurement
Test conditions,
- Sample length
Once subjected to the voltage test in item 2 or 3 above
- Minimum immersion time in hot water
- Water temperature
4.2| Test results
5.5 Conductor continuity test
Rated voltage of cable
300/300 V|300/500 v450/750 vSee GB/T3956 or subsequent product standards
No breakdown occurs
No breakdown occurs
See the table in the subsequent product standards
See the table in the subsequent product standards
Test 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
Wires with a conductor nominal cross-section of 0.4mm2 or less should be checked with an audible and visual indicating device of no more than 36V or other applicable instruments, and the core should not be broken.
5.6 Insulation heat shrinkage test
The insulation of wires with a conductor nominal cross-section of 0.4mm2 or less shall be subjected to a heat shrinkage test at 150±3℃ for 15min, and the insulation shrinkage rate shall not exceed 4%.
5.7 Flame retardancy test
JB8734.1—1998
Sheathed cables and wires with a conductor nominal cross-section of 0.1mm2 or more shall comply with the test requirements specified in GB12666.2. 6 Delivery length
The coil length is 100m, and the reel length should be greater than 100m. Short sections of not less than 10m are allowed to be delivered, and the number shall not exceed 10% of the total length of delivery, and the number of short sections in each piece shall not exceed 5.
Any length is allowed to be delivered according to the agreement between the two parties. The length measurement error shall not exceed ±0.5%. 7 Acceptance rules
Products shall be inspected and qualified by the technical inspection department of the manufacturer before they can leave the factory. The products leaving the factory shall be accompanied by a product quality inspection certificate. Products shall be accepted by the specified tests.
The sampling quantity of the delivery batch shall be stipulated by the agreement of both parties. If the user does not make any requirements, it shall be carried out in accordance with the regulations of the manufacturer. If the results of the sampling items are unqualified, double sampling shall be carried out for a second test. If it is still unqualified, 100% inspection shall be carried out. The appearance of the products shall be checked piece by piece with force (normal vision). 8 Marking and packaging
8.1 The coiled or reeled cables (wires) shall be neatly wound and properly packaged. The cable reels shall comply with the provisions of JB/T8137. 8.2 Each country or each reel should be attached with a label indicating: a) Manufacturer's name:
b) Model, specification (conductor structure), mm2: c) Rated voltage, V,
d) Length, m (weight, kg);
e) Manufacturing date, year and month,
f) This standard number or certification mark:
g) Correct rotation direction of the cable reel.
8.3 When packing, the outer shell of the box should be marked with: a) Manufacturer's name:;
b) Product model, specification and rated voltage, mm2, V:) This standard number or certification mark
d) Box size and weight: kg
e) Moisture-proof and anti-throw mark.
8.4 The packaging of exported products shall be carried out in accordance with relevant regulations, 121 Electrical performance
The cable should have sufficient dielectric strength and insulation resistance, and should be checked for compliance with the standard requirements according to the tests specified in Table 3. 5.2 Dimensions
The average outer diameter or outer dimensions of the cable should comply with the provisions of subsequent product standards. The difference (ovality) between the outer diameters of any two points on the same cross section of a circular sheathed cable should not exceed 15% of the upper limit of the average outer diameter. Measure two points and take the maximum difference.
5.3 Shield braiding density
For single-core shielded wires with a nominal cross-section of 0.12mm2 or less, the shield braiding (or winding) density should not be less than 60%, and for other shielded wires, the shield braiding (or winding) density should not be less than 80%. 5.4 Insulation core tearing test
Two-core unsheathed flat soft wires should be subjected to insulation core tearing test. 10
JB 8734.1—1998
Take a sample of appropriate length, cut it at one end along the groove on the insulation surface, and use a tensile machine to measure the tearing force required to tear off the insulation at a speed of 5mm/s. The tearing force should be between 3 and 30N.
The insulated wire core after tearing off should be subjected to the voltage test specified in Table 3. Table 3 Electrical properties of cable
Test items
Conductor resistance measurement
Test results
-Maximum value
Finished cable voltage test
Test conditions
-Minimum length of sample
-Minimum time immersed in water
-Water temperature
Test voltage (AC)
-Insulation thickness 0.6mm and below
Insulation thickness above 0.6mm
Minimum voltage application time each time
Test results
Insulation core voltage test
Test items,
-Sample length||tt ||- Minimum immersion time
- Water temperature
Test voltage (AC)
- Insulation thickness 0.6mm and below
- Insulation thickness above 0.6mm
Minimum voltage application time each time
Test results
Insulation resistance measurement
Test conditions,
- Sample length
Once subjected to the voltage test in item 2 or 3 above
- Minimum immersion time in hot water
- Water temperature
4.2| Test results
5.5 Conductor continuity test
Rated voltage of cable
300/300 V|300/500 v450/750 vSee GB/T3956 or subsequent product standards
No breakdown occurs
No breakdown occurs
See the table in the subsequent product standards
See the table in the subsequent product standards
Test 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
Wires with a conductor nominal cross-section of 0.4mm2 or less should be checked with an audible and visual indicating device of no more than 36V or other applicable instruments, and the core should not be broken.
5.6 Insulation heat shrinkage test
The insulation of wires with a conductor nominal cross-section of 0.4mm2 or less shall be subjected to a heat shrinkage test at 150±3℃ for 15min, and the insulation shrinkage rate shall not exceed 4%.
5.7 Flame retardancy test
JB8734.1—1998
Sheathed cables and wires with a conductor nominal cross-section of 0.1mm2 or more shall comply with the test requirements specified in GB12666.2. 6 Delivery length
The coil length is 100m, and the reel length should be greater than 100m. Short sections of not less than 10m are allowed to be delivered, and the number shall not exceed 10% of the total length of delivery, and the number of short sections in each piece shall not exceed 5.
Any length is allowed to be delivered according to the agreement between the two parties. The length measurement error shall not exceed ±0.5%. 7 Acceptance rules
Products shall be inspected and qualified by the technical inspection department of the manufacturer before they can leave the factory. The products leaving the factory shall be accompanied by a product quality inspection certificate. Products shall be accepted by the specified tests.
The sampling quantity of the delivery batch shall be stipulated by the agreement of both parties. If the user does not make any requirements, it shall be carried out in accordance with the regulations of the manufacturer. If the results of the sampling items are unqualified, double sampling shall be carried out for a second test. If it is still unqualified, 100% inspection shall be carried out. The appearance of the products shall be checked piece by piece with force (normal vision). 8 Marking and packaging
8.1 The coiled or reeled cables (wires) shall be neatly wound and properly packaged. The cable reels shall comply with the provisions of JB/T8137. 8.2 Each country or each reel should be attached with a label indicating: a) Manufacturer's name:
b) Model, specification (conductor structure), mm2: c) Rated voltage, V,
d) Length, m (weight, kg);
e) Manufacturing date, year and month,
f) This standard number or certification mark:
g) Correct rotation direction of the cable reel.
8.3 When packing, the outer shell of the box should be marked with: a) Manufacturer's name:;
b) Product model, specification and rated voltage, mm2, V:) This standard number or certification mark
d) Box size and weight: kg
e) Moisture-proof and anti-throw mark.
8.4 The packaging of exported products shall be carried out in accordance with relevant regulations, 121 Electrical performance
The cable should have sufficient dielectric strength and insulation resistance, and should be checked for compliance with the standard requirements according to the tests specified in Table 3. 5.2 Dimensions
The average outer diameter or outer dimensions of the cable should comply with the provisions of subsequent product standards. The difference (ovality) between the outer diameters of any two points on the same cross section of a circular sheathed cable should not exceed 15% of the upper limit of the average outer diameter. Measure two points and take the maximum difference.
5.3 Shield braiding density
For single-core shielded wires with a nominal cross-section of 0.12mm2 or less, the shield braiding (or winding) density should not be less than 60%, and for other shielded wires, the shield braiding (or winding) density should not be less than 80%. 5.4 Insulation core tearing test
Two-core unsheathed flat soft wires should be subjected to insulation core tearing test. 10
JB 8734.1—1998
Take a sample of appropriate length, cut it at one end along the groove on the insulation surface, and use a tensile machine to measure the tearing force required to tear off the insulation at a speed of 5mm/s. The tearing force should be between 3 and 30N.
The insulated wire core after tearing off should be subjected to the voltage test specified in Table 3. Table 3 Electrical properties of cable
Test items
Conductor resistance measurement
Test results
-Maximum value
Finished cable voltage test
Test conditions
-Minimum length of sample
-Minimum time immersed in water
-Water temperature
Test voltage (AC)
-Insulation thickness 0.6mm and below
Insulation thickness above 0.6mm
Minimum voltage application time each time
Test results
Insulation core voltage test
Test items,
-Sample length||tt ||- Minimum immersion time
- Water temperature
Test voltage (AC)
- Insulation thickness 0.6mm and below
- Insulation thickness above 0.6mm
Minimum voltage application time each time
Test results
Insulation resistance measurement
Test conditions,
- Sample length
Once subjected to the voltage test in item 2 or 3 above
- Minimum immersion time in hot water
- Water temperature
4.2| Test results
5.5 Conductor continuity test
Rated voltage of cable
300/300 V|300/500 v450/750 vSee GB/T3956 or subsequent product standards
No breakdown occurs
No breakdown occurs
See the table in the subsequent product standards
See the table in the subsequent product standards
Test 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
Wires with a conductor nominal cross-section of 0.4mm2 or less should be checked with an audible and visual indicating device of no more than 36V or other applicable instruments, and the core should not be broken.
5.6 Insulation heat shrinkage test
The insulation of wires with a conductor nominal cross-section of 0.4mm2 or less shall be subjected to a heat shrinkage test at 150±3℃ for 15min, and the insulation shrinkage rate shall not exceed 4%.
5.7 Flame retardancy test
JB8734.1—1998
Sheathed cables and wires with a conductor nominal cross-section of 0.1mm2 or more shall comply with the test requirements specified in GB12666.2. 6 Delivery length
The coil length is 100m, and the reel length should be greater than 100m. Short sections of not less than 10m are allowed to be delivered, and the number shall not exceed 10% of the total length of delivery, and the number of short sections in each piece shall not exceed 5.
Any length is allowed to be delivered according to the agreement between the two parties. The length measurement error shall not exceed ±0.5%. 7 Acceptance rules
Products shall be inspected and qualified by the technical inspection department of the manufacturer before they can leave the factory. The products leaving the factory shall be accompanied by a product quality inspection certificate. Products shall be accepted by the specified tests.
The sampling quantity of the delivery batch shall be stipulated by the agreement of both parties. If the user does not make any requirements, it shall be carried out in accordance with the regulations of the manufacturer. If the results of the sampling items are unqualified, double sampling shall be carried out for a second test. If it is still unqualified, 100% inspection shall be carried out. The appearance of the products shall be checked piece by piece with force (normal vision). 8 Marking and packaging
8.1 The coiled or reeled cables (wires) shall be neatly wound and properly packaged. The cable reels shall comply with the provisions of JB/T8137. 8.2 Each country or each reel should be attached with a label indicating: a) Manufacturer's name:
b) Model, specification (conductor structure), mm2: c) Rated voltage, V,
d) Length, m (weight, kg);
e) Manufacturing date, year and month,
f) This standard number or certification mark:
g) Correct rotation direction of the cable reel.
8.3 When packing, the outer shell of the box should be marked with: a) Manufacturer's name:;
b) Product model, specification and rated voltage, mm2, V:) This standard number or certification mark
d) Box size and weight: kg
e) Moisture-proof and anti-throw mark.
8.4 The packaging of exported products shall be carried out in accordance with relevant regulations, 12The insulation of wires of 4mm2 and below shall be subjected to a heat shrinkage test at 150±3℃ for 15min, and the insulation shrinkage rate shall not exceed 4%.
5.7 Flame-retardant test
JB8734.1—1998
Sheathed cables and wires with a conductor nominal cross-section of 0.1mm2 and above shall comply with the test requirements specified in GB12666.2. 6 Delivery length
The coil length is 100m, and the coil length shall be greater than 100m. Short sections of not less than 10m are allowed to be delivered, and the number shall not exceed 10% of the total length of delivery, and the number of short sections in each piece shall not exceed 5.
According to the agreement between the two parties, any length is allowed to be delivered. The length measurement error shall not exceed ±0.5%. 7 Acceptance rules
Products shall be inspected and qualified by the technical inspection department of the manufacturer before they can be shipped, and the shipped products shall be accompanied by a product quality inspection certificate. Products shall be accepted by the specified tests.
The sampling quantity of the delivery batch shall be stipulated by the agreement between the two parties. If the user does not make any request, it shall be carried out in accordance with the regulations of the manufacturer. If the results of the sampling items are unqualified, the sampling shall be doubled for the second test. If it is still unqualified, 100% inspection shall be carried out. The appearance of the product shall be checked piece by piece with force (normal vision). 8 Marking and packaging
8.1 The coiled or reeled cables (wires) shall be neatly wound and properly packaged, and the cable reels shall comply with the provisions of JB/T8137. 8.2 Each country or each reel shall be attached with a label indicating: a) Manufacturer name:
b) Model, specification (conductor structure), mm2:
d) Length, m (weight, kg);
e) Manufacturing date year and month,
f) This standard number or certification mark:
g) Correct rotation direction of the cable reel.
8.3 When packing, the box shell should be marked with: a) Manufacturer name:;
b) Product model, specification and rated voltage, mm2, V:) This standard number or certification mark
d) Box size and weight: kg
e) Moisture-proof and anti-throw mark.
8.4 The packaging of exported products shall be carried out in accordance with relevant regulations, 12The insulation of wires of 4mm2 and below shall be subjected to a heat shrinkage test at 150±3℃ for 15min, and the insulation shrinkage rate shall not exceed 4%.
5.7 Flame-retardant test
JB8734.1—1998
Sheathed cables and wires with a conductor nominal cross-section of 0.1mm2 and above shall comply with the test requirements specified in GB12666.2. 6 Delivery length
The coil length is 100m, and the coil length shall be greater than 100m. Short sections of not less than 10m are allowed to be delivered, and the number shall not exceed 10% of the total length of delivery, and the number of short sections in each piece shall not exceed 5.
According to the agreement between the two parties, any length is allowed to be delivered. The length measurement error shall not exceed ±0.5%. 7 Acceptance rules
Products shall be inspected and qualified by the technical inspection department of the manufacturer before they can be shipped, and the shipped products shall be accompanied by a product quality inspection certificate. Products shall be accepted by the specified tests.
The sampling quantity of the delivery batch shall be stipulated by the agreement of both parties. If the user does not make any request, it shall be carried out in accordance with the regulations of the manufacturer. If the results of the sampling items are unqualified, the sampling shall be doubled for the second test. If it is still unqualified, 100% inspection shall be carried out. The appearance of the product shall be checked piece by piece with force (normal vision). 8 Marking and packaging
8.1 The coiled or reeled cables (wires) shall be neatly wound and properly packaged, and the cable reels shall comply with the provisions of JB/T8137. 8.2 Each country or each reel shall be attached with a label indicating: a) Manufacturer name:
b) Model, specification (conductor structure), mm2:
d) Length, m (weight, kg);
e) Manufacturing date year and month,
f) This standard number or certification mark:
g) Correct rotation direction of the cable reel.
8.3 When packing, the box shell should be marked with: a) Manufacturer name:;
b) Product model, specification and rated voltage, mm2, V:) This standard number or certification mark
d) Box size and weight: kg
e) Moisture-proof and anti-throw mark.
8.4 The packaging of exported products shall be carried out in accordance with relevant regulations, 12
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