This standard applies to rigid and flexible cables with vulcanized rubber insulation and sheath (if any) of rated voltage Uo/U of 450/750V and below, used in power plants with AC rated voltage not exceeding 450/750V. GB 5013.1-1997 Rubber insulated cables with rated voltage 450/750V and below Part 1: General requirements GB5013.1-1997 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Rubber insulated cables with rated voltages up to and including 450/750 V Part 1: General requirements
1 Overview
1.1 Scope
GB 5013. 11997
idt IEC 245-1:1994
Replaces GB 5013.1-85
GB5013 Part 1 applies to rigid and flexible cables with vulcanized rubber insulation and sheath (if any) with rated voltage UJ./450/750 V and below, used for power devices with rated voltage of AC not exceeding 450/750 V. Note: The term "soft" can be used for some types of flexible cables. Cables of various types are specified in GB5013.3, GB5013.4 and other standards. The cable model representation method is shown in Appendix A. The test methods specified in Parts 1 to 7 are shown in GB5013.2, GB12666.2 and the relevant parts of GB/T2951. 1.2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard by being cited 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 sheathing materials Part 1: General test methods Section 1: Thickness and dimensions measurement - Mechanical properties test GB/T 2951.2-1997 General test methods for cable insulation and sheathing materials Part 1: General test methods Section 2: Thermal aging test methods GB/T 2951.4-1997 General test methods for cable insulation and sheathing materials Part 1: General test methods Section 4: Low temperature test GB/T2951.5-1997 General test methods for cable insulation and sheathing materials Part 2: Special test methods for elastic rest mixtures Section 1 Oxygen resistance test - Hot extension test - Mineral oil immersion test GB/T 2951. 6--1997
General test methods for cable insulation and sheath materials Part 3: Special test methods for polyvinyl chloride mixtures Section 1: High temperature pressure test---Anti-cracking test GB 5013. 2-1997
Rubber insulated cables with rated voltages of 450/750V and below Part 2: Test methods Rubber insulated cables with rated voltages of 450/750V and below Part 3: Heat-resistant silicone rubber insulated cables GB 5013. 3-1997
Rubber insulated cables with rated voltages of 450/750V and below Part 4: Flexible cords and flexible cables GB 5013. 4-1997
Rubber insulated cables with rated voltages of 450/750V and below Part 5: Elevator cables GB 5013. 5-1997
GB 5013. 6—1997
Rubber insulated cables for rated voltages up to and including 450/750V Part 6: Electric welding machine cables Rubber insulated cables for rated voltages up to and including 450/750V Part 7: Heat-resistant ethylene-vinyl acetate GB 5013,7-.-1997
Rubber insulated cables
GB 6995. 4—86
Identification marks for insulated cores of wires and cables for electrical equipment GB 12666. 2—90
Fire test methods for wires and cables Part 2: Vertical fire test method for single wire and cable Approved by the State Technical Supervision Department on October 13, 1997 and implemented on October 1, 1998
GB/T3956—1997 Conductors of cables
2 Definitions
The following definitions apply to this standard.
2.1 Definition of insulation and sheath materials
2.1.1 Model of mixture
GB5013.1—1997
Mixtures are classified according to the properties measured by the specified tests. The model has no direct relationship with the composition of the mixture. 2.1.2 Rubber mixture
Rubber mixture is a mixture of natural rubber and (or) synthetic elastomers after appropriate selection, proportioning, processing and vulcanization. Its unique components are natural rubber and (or) synthetic elastomers.
Vulcanization refers to the next processing after the insulation and (or) sheath are extruded. The purpose is to make the elastomer water-crosslinked for a long time. 2.1.3 Polyvinyl chloride mixture (PCP) or other equivalent synthetic elastomers The elastomer of the vulcanized mixture is chloroprene rubber or other equivalent synthetic elastomers with similar properties to PCP. 2.1.4 Ethylene-vinyl acetate rubber mixture (EVA) or other equivalent synthetic elastomers The elastomer of the vulcanized mixture is ethylene-vinyl acetate or other equivalent synthetic elastomers with similar properties to EVA. 2.2 Definition of test
2.2.1 Type test (symbol T)
Type test refers to the test conducted on the type of relay specified in this standard before supply according to the general commercial source, in order to prove that the cable 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. 2.2.2 Selection test (symbol S)
Tests conducted on finished cable samples or components taken from finished cables to prove that the finished cable products meet the design specifications. 2.3 Rated voltage
The rated voltage of the cable is the reference voltage used for cable design and electrical testing. The rated voltage is represented by UU, and the unit is V. U. is the effective value of the voltage between any insulated conductor and "ground" (the metal sheath of the cable or the 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. In AC systems, the rated voltage of the cable should be at least equal to the nominal voltage of the system using relays. This condition applies to both U and U values.
In DC systems, the standard voltage of the system should not be greater than 1.5 times the rated voltage of the cable. Note: The working voltage of the system is allowed to exceed the nominal voltage of the system by 10% 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 Marking
3.1 Origin marking and cable identification
The cable should have a continuous marking of the manufacturer's name, product model and rated voltage. The brand mark can be a marking line or a repeated mark of the manufacturer's name or trademark. The product model representation method is shown in Appendix A. The mark can be printed in oil or embossed on the insulation or expansion sleeve, or printed in ink on the scraper tape or marking isolation tape. 3.1.1 Continuity of marking
The distance between the end of a complete mark and the beginning of the next mark should not exceed: if the mark is on the sheath, it is 500mml; if the mark is on the insulation or tape, it is 200mm. 3. 1-2 Abrasion resistance
GB5013.1-1997
Ink printed marks should be resistant to abrasion. They should be checked for compliance with the requirements according to the test specified in 1.8 of GB5013.2-1997. 3.1.3 Clarity
All marks should be legible.
The color of the marking line should be easy to identify or recognize. If necessary, it can be wiped clean with gasoline or other suitable solvents. 3.2 Product Representation Method
The product should be represented by model, specification and standard number. The specifications include rated voltage, number of cores and nominal conductor cross-section. The cable packaging should be accompanied by a label indicating the product model, specification and standard number, and the name of the origin. 4 Identification of Insulated Cores
Each insulated core should be identified according to the following provisions: 5-core and below cables are identified by color, see 4.1; 5-core and above cables are identified by color or number, see 4.1 and 4.2. 4.1 Color Identification of Insulated Cores
4. 1.1 General Requirements
The insulated cores of the cable should be identified by colored insulation or other suitable methods. Except for the green/yellow combination color, each core of the cable should only use one color.
Any multi-core cable should not use red, gray, white, and continuous colors and yellow that are not combined colors. 4.1.2 Color Color No.
The preferred color spectrum is:
Single-core cable: no preferred color spectrum,
Two-core cable, no preferred color spectrum
Three-core cable: green/yellow, light blue, brown, or light blue, black, brown; Four-core cable: green/yellow, light blue, black, brown, or light blue, black, brown, smoked or brown: Five-core cable: green/yellow, light blue, black, brown, black or brown, or light blue, black, brown, black or brown, black or brown: || tt||More than five cores in the outer layer, the core is green/yellow, the 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 white, 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.
Various colors should be clearly identifiable and resistant to abrasion. It should be inspected according to the test method specified in 1.8 of GB5013.21997. 4.1.3 Green/yellow combination color
The color distribution of green/yellow combination color cores shall meet the following conditions (according to GB6995): For each 15mm long insulated core, one color shall cover at least 30% and no more than 70% of the surface of the insulated core, while the other color shall cover the rest of the insulated core. Note: Regarding the use of green/yellow combination color and light blue, when the green/yellow combination color is used in accordance with the above provisions, it indicates that it is used exclusively to identify the insulated core connected to the ground or similar protective purpose. The light color is used to identify the insulated core connected to the neutral line. If there is no neutral line, the light blue can be used to identify any insulated core except the grounding or protective conductor. 4.2 Digital identification of insulated cores
4.2.1 General requirements
The insulation of the cores shall be the same color and arranged in numerical sequence, except for the green/yellow core (if any). If there is a green/yellow insulated core, it shall meet the requirements of 4.1.3 and shall be placed on the outer layer. The numbering shall start with the number 1 on the inner layer. GB 5013. 1- 1997
Numbers shall be printed on the outer surface of the insulated wire core using Arabic numerals. The numerals shall be the same color and have a clear contrast with the insulation color. The Arabic numerals must be legible.
4.2.2 Priority of marking arrangement
Number markings shall be repeated at equal intervals along the insulated wire core. Two adjacent complete number markings shall be reversed. When the marking consists of one number, the dash shall be placed below the number. If the marking consists of two numbers, one number shall be placed below the other number, and a dash shall be placed below the lower number. The distance d between two adjacent complete number markings shall not exceed 50 mm:
The arrangement of the markings is shown in the figure below:
4.2.3 Adhesion
Number markings shall be resistant to rubbing and shall be checked for compliance with the requirements of this standard according to the test specified in 1.8 of GB5013.2-1997. 5 General requirements for cable structure
5.1 Conductor
5.1.1 Material
The conductor shall be annealed copper wire. Unless otherwise specified in the product standard (GB5013.3, GB5013.4, etc.), each single wire in the conductor may be untinned or tinned copper wire. Tinned copper wire shall be covered with an effective tin layer. 5.1.2 Structure
Unless otherwise specified in the relevant product standard, the maximum diameter of the single wire in the conductor shall comply with the requirements of GB/T3956-1997. For the types of conductors used in various types of cables, please refer to the product standards (GB5013.3, GB5013.4, etc.). 5.1.3 Isolation layer between conductor and insulation
A layer of isolation tape composed of suitable materials may be optionally placed between the untinned conductor or the tinned conductor and the insulation. After the aging test specified in Table 1, the bare copper conductor with or without an isolation layer and the insulation with IE1 type mixture shall not turn black. 5.1.4 Structural inspection
The structure shall be inspected by testing and measuring, and shall meet the requirements of 5.1.1 and 5.1.2 and GB/T3956-1997. 5.1.5 Resistance
Unless otherwise specified in the relevant product standards (GB5013.3, GB5013.4, etc.), the resistance of each core conductor at 20°C shall meet the requirements of GB/T3956-1997 for various conductors. The test method specified in 2.1 of GB5013.21997 shall be used to check whether it meets the requirements. 5.2 Insulation
5.2. 1 Material
The insulation shall be a vulcanized rubber mixture specified for each type of cable in the product standards (GB5013.3, GB5013.1, etc.). Cables insulated with Shantong rubber mixture—Type E1. Cables insulated with silicone rubber—Type IE2.
Ethylene-vinyl acetate rubber mixture or equivalent material insulation cable - IE3 type. The test requirements of these mixtures are specified in Table 1. For cables insulated by any of the above insulation mixtures and included in the product standards (GB5013.3, GB5013.4, etc.), the maximum operating temperature is specified in the corresponding product standards. 5.2.2 Covered conductor
GB 5013. 11997
The insulation should be tightly wrapped on the conductor or isolation layer. For each type of cable listed in the product standards (GB5013.3, GB5013.4, etc.), whether the covering insulation is single-layer or multi-layer, and whether it is wrapped with scraping tape uniformity. The insulation should be able to be stripped without twisting the insulation, conductor, or plating or gold plating (if any). Compliance with the standard requirements is checked by inspection and manual measurement. 5.2.3 Thickness
The average value of insulation thickness shall not be less than the specified value for each type and specification of cable listed in the table of product standards (GB5013.3, GB5013.4, etc.).
However, the thickness at any point may be less than the specified value, as long as it is not less than 90% of the specified value minus 0.1m. It shall be checked for compliance with the requirements according to the test method specified in 1.9 of GB5013.2-1997. 5.2.4 Mechanical properties before and after aging www.bzxz.net
Insulation shall have sufficient mechanical strength and elasticity within the temperature range of normal use. It shall be checked for compliance with the standard requirements according to the test specified in Table 1. The aging of the core with IE1 type mixture as insulation should be carried out together with the conductor and the isolation layer (if any). The applicable test methods and test requirements are specified in Table 1. Table 1 Non-electrical test requirements for vulcanized rubber insulation Serial number
Test item
Tensile strength and elongation at break
Delivery status Original performance
Tensile strength original value:
Minimum intermediate value
Elongation at break original value
-Minimum intermediate value
Air Performance after oven aging
【Aging conditions:
——Processing time
Tensile strength after aging
Minimum intermediate value
Maximum change rate
Elongation at break after aging
Minimum intermediate value
Maximum change rate
Performance after oxygen bomb aging
Aging conditions:
-—Humidity
—Processing time
Tensile strength after aging
—— Minimum median value
—-maximum change rate1
Elongation after aging
Minimum median value
Maximum change rate
Mixture type
200±2
10×24
150±2
1) Change rate, the ratio of the median value after aging to the median value before aging to the median value before aging, expressed as a percentage, test method
GB(GB/T)
For IE1 5013. 2
For IE2 and [E3
Tea document number
Test item
Performance after air bomb aging
Aging conditions:
Processing time
Tensile strength after aging
-Minimum median value
Elongation at break after aging
Maximum rate of change
Hot extension test
Test conditions:
·--Loading time
--Mechanical stress
Test results
Elongation under load, maximum value
Elongation after cooling, maximum value
High temperature pressure test
Test conditions
--Pressure applied by sheet
Hot time under load
Test results
…--Indentation depth median value, maximum value
GB 5013.1—1997
Table 1(end)
200±3
Model of mixture
150±3
200±3
Current GB/T
150 -2
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. 2) No positive deviation is specified.
5.3 Filling
5.3.1 Material
Test method
GB(GB/T)" Article No.
Unless otherwise specified in the product standard (GB5013.3, GB5013.4, etc.), the filler shall be composed of one or any combination of the following materials:
-Vulcanized or non-vulcanized rubber mixture
-Natural or synthetic spun fiber;
-Paper.
There should be no harmful interaction between the components of the filler and the insulation and (or sheath) 5.3.2 Coating
For each type of cable, the product standard (GB5073.3, GB5013.4, etc.) specifies whether there is a filler or whether the sheath is embedded between the cores to form a filling (see 5.5.2). The filler should fill the gaps between the insulating cores to form a practically round cable core. The filler should be able to be stripped without damaging the insulating core. The cable cores can be tied together with a film or tape before filling. 5.4 Spun fiber braiding
5.4.1 Materials
The yarn used for the spun fiber braiding layer should be the material required for each type of cable in the product standard (GB5013.3, GB5013.4, etc.). In the product GB5013.1- -1997
When the standard specifies a braided layer, the braiding yarn may be a natural material (cotton yarn, treated cotton yarn, silk) or a synthetic material (rayon, linamide, etc.) or may be filaments made of glass fiber or equivalent materials. 5.4.2 Wrap
The braiding should be evenly hooked, without knots or gaps. In order to prevent the braided layer made of corrugated glass fiber from being scratched, it should be treated with appropriate materials.
5.5 Sheath
5.5.1 Material
The sheath material should be a vulcanized rubber mixture specified for each type of cable in the product standard (GB5013.3, GB5013.4, etc.).
Rubber mixture sheathed cable—SE3 type.
Chloroprene mixture or other equivalent synthetic Elastomer sheathed cable - SE4 type. The test requirements for these mixtures are specified in Table 2. 5.5.2 Sheath
The protective sheath of each type of cable specified in the product standard (GB5013.3, GB5013.4, etc.) shall consist of a single layer or double layer (inner layer or sheath and outer layer or sheath).
5.5.2.1 Single-layer sheath
The sheath shall be covered with a single layer:
Single-core cable, covered on the insulating core:-Multi-core cable, covered on the cable core and filler. The sheath of a multi-core cable shall be able to be stripped without damaging the cable core. A sheath tape or film may be wrapped under the sheath. In some cases, it is specified in the product standard (GB5013.4, etc.) that the sheath may be embedded in the gap between the cable cores to form a filler (see 5.3.2). | |tt||5.5.2.2 Double-layer sheath
The inner sheath shall be extruded as specified in 5.5.2.1. A layer of scraper tape or equivalent tape may be wrapped around the outer surface of the inner sheath. For a tape or isolation layer (if any) with a thickness not exceeding 0.5m, it may be included in the thickness measurement of the inner sheath, as long as the tape adheres to the inner sheath.
The outer layer or sheath shall be wrapped around the outer surface of the inner sheath or tape. It may or may not adhere to the inner sheath or tape. If the outer sheath adheres to the inner sheath, it shall be clearly distinguishable from the inner sheath; if it does not adhere, it shall be easily separated from the inner sheath. 5.5.3 Thickness
The average value of the sheath thickness shall not be less than the specified value for each type and specification of network cable listed in the table of the product standard (GB5013.3, GB5013.4, etc.).
Unless otherwise specified, the thickness at any point may be less than the specified value, as long as it is not less than 85% of the specified value minus 0.1mm. The test method specified in 1.10 of GB5013.2-1997 shall be used to check whether it meets the standard requirements. Note: Appendix R gives the calculation method for the sheath thickness of three types of cables, 245IEC53, 245IEC57, and 246IEC6 in GB5013.4-1997.
5.5.4 Mechanical properties before and after aging
Within the normal operating temperature range, the sheath should have sufficient mechanical strength and elasticity. The test specified in Table 2 shall be used to check whether it meets the standard requirements. Applicable test methods and test requirements are specified in Table 2. Serial number
Test item
Tensile strength agentElongation at break
Original properties in delivery state
Original value of tensile strength:
-Minimum intermediate value
Original value of elongation at break:
Minimum intermediate value
Performance after aging in air chamber
Aging conditions:
-Temperature
Treatment time
Tensile strength after aging
-Minimum intermediate value
-Maximum change Rate
Aging shop elongation at break
Minimum value
Maximum change rate
Magnetic properties after mineral oil
Test conditions:
Oil-out time
Tensile strength after offshore oil
Maximum change rate
Elongation at break after oil
Maximum change rate 1
Hot extension test
Test conditions:
One temperature
Load duration
Mechanical stress
Test results
GB 5013. 1-1997
Table 2 Non-electrical test requirements for vulcanized rubber sheaths Unit
-Stretching rate under load, maximum value
-Stretching rate after cooling, maximum value
Low-temperature bending test
Test conditions,
--Time of applying low temperature
Test results
Low-temperature tensile test
Test conditions:
...Time of applying low temperature
Test results
Elongation when not broken·Minimum
200±3
Mixture type
10×24
—158
200±3
—35±2
See GB/T2951.48.2.3
No crack
—35±2
See G13/T 2951.48.4.4
No crack
1) Change rate: 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 white ratio. 2) Positive bias is not specified.
Test method
Article
2951.28.1.3.1
5.6 Finished cable test
5.6.1 Electrical properties
GB 5013. 1—1997
The cable should have sufficient dielectric strength and insulation resistance. The test specified in Table 3 should be carried out to check whether it meets the standard requirements. The test method and test requirements are specified in Table 3. Table 3 Electrical test requirements for vulcanized rubber insulated cables No.
Test item
Conductor electrical measurement
Test result Maximum value
Finished cable voltage test
Test conditions
Minimum length of specimen
Minimum time immersed in water
··Water overflow
Test voltage (AC)
Minimum voltage applied time per drop
Test results
Electrical test for insulated wire core
Test conditions
Test drop length
--Minimum time immersed in water
--Water temperature
According to the specified insulation thickness and applied voltage (AC)--0.6 mm and below
Above 0.6 mm
Minimum voltage applied time per drop
Test results
Insulation resistance measurement above 90℃!
Test conditions
-Test temperature
Test results
Rated voltage of cable
300/300 V300/500 V
450/750V
See GB/T 3956-1997 and product standards
(CB 5013.3.GB 5013.4, etc.)
1) Only applicable to GB5013.7 Ethylene-vinyl acetate rubber insulated cable 2 Overall dimensions
No breakdown
No breakdown
B 5013.7 Table 1 and Table 3
Test method
GB Article
5013.22.1
The average overall dimensions of the cable should be within the range specified in the tables of the product standard (GB5013.3, GB5013.4, etc.). 2.3
The difference in the outer diameter (ovality) of any two points measured on the same cross section of the circular expanded cable should not exceed 15% of the upper limit specified for the average outer diameter.
The test method specified in 1.11 of GB5013.2-1997 should be used to check whether it meets the standard requirements. 5.6.3 Mechanical strength of flexible cable
Flexible cables should be able to withstand bending and other mechanical stresses caused by normal use. When specified in the product standard (GB5013.3, GB5013.4, etc.), the test method specified in 3 of GB5013.2-1997 shall be used to check whether it meets the standard requirements.
5.6.3.1 Flexure test of flexible relay
See 3.1 of GB 5013.2-1997. GB 5013.1-1997
Flexible cables with a conductor nominal cross-section exceeding 4 mm2 and all single-core cables are not subject to this test. During the test, after 15,000 reciprocating movements, i.e. 30,000 one-way movements, neither current interruption nor short circuit between conductors shall occur.
After the test, the sheath (if any) of the 3-core or 3-core cable should be stripped off. Then the voltage test should be carried out on the cable or insulated wire core according to the applicable provisions of 2.2 or 2.3 of GB5013.2-1997. The torsion test voltage shall not exceed 2000V. 5.6.3.2 Static flexure test
See 3.2 of GB 5013. 2-1997. The average value of I\ measured twice (see Figure 2 of GB5013.2-1997) shall not exceed the value specified in Table 4 for welding machine cables and shall not exceed the value specified in Table 5 for elevator cables. Table 4 Static flexure test requirements for welding machine cables Nominal area, mm2
Cable type
Braided elevator cable
Vulcanized rubber sheathed and oxygen or equivalent synthetic elastomer rubber sheathed elevator cable
5.6.3-3 Abrasion test
See 3.3 of GR 5013.2.--1997. Table 5 Static flexure test requirements for elevator cables
12 cores and below
16 and 18 cores
More than 1B cores
12 cores and below
16 and 18 cores
More than 18 cores
Maximum distance \.cm
Maximum distance \,cm
After 20 000 single-stroke movements, the total length of the visible part of the installed test insulation shall not be less than 10 mm. The installed specimens after the test shall be subjected to voltage test according to 2.2 of GB 5013.2-1997. 5.6.3.4 The tensile strength of the central cushion core of the elevator cable shall be shown in 3.4 of GB5013.2-1997.
During the test, the central potential core or the central load-bearing core shall not break. 5.6.3.5 Elevator cable combustion test
See 5 of GB 5013. 2-1997.
The cable shall meet the requirements of GBT 12666. 2 and no short circuit shall occur between the cores during the test. 5.6.3.6 Heat resistance test of textile braided layer
See 6 of G5013.2-1997.
If the shrinking braided layer or any of its components does not melt or carbonize during the test, the test is considered to be qualified. 6 Cable use guidelines
Under consideration.
GB 5013.1—1997
Appendix A
(Clear record of the standard)
Model representation
The various cable models included in this standard are named with two numbers, placed after the IEC245 standard number. The first number indicates the basic classification of the cable, and the second number indicates the specific type in the basic classification. The classification and model are as follows
0——Unsheathed cable for fixed wiring
03——Heat-resistant silicone rubber insulated cable with a maximum conductor temperature of 180 (245LEC03)04——Conductor maximum temperature 110C, 750V hard conductor, kitchen heat ethylene-vinyl acetate rubber insulation single-core unsheathed cable (245 1EC 04)
05-Conductor maximum temperature 110℃, 750V soft conductor, heat-resistant ethylene-vinyl acetate rubber insulation single-core unsheathed cable (245IEC05)
06-Conductor maximum temperature 110℃, 500V hard conductor, heat-resistant ethylene-vinyl acetate rubber or other equivalent synthetic elastomer insulation single-core unsheathed cable (2451EC06)07-*-Conductor maximum temperature 110℃, 500V soft conductor, heat-resistant ethylene-vinyl acetate rubber or other equivalent Appropriate synthetic elastomer insulated single-core unsheathed cable (245IEC07) 5--General purpose flexible cable
51--Braided flexible cord (245IEC51)
53--Ordinary strength rubber sheathed flexible cord (245IEC53) 57--Ordinary chloroprene or other equivalent synthetic elastomer rubber sheathed flexible cord (245IEC57) 58--Chloroprene or other equivalent synthetic elastomer rubber sheathed round cable for decorative concave road (245IEC58), fan cable (245IEC58f)
6---Heavy duty flexible cable
66---Heavy duty fluoroprene or other equivalent synthetic elastomer rubber sheathed flexible cable (245IEC66)7--Special purpose flexible cable
70~--Braided elevator cable (245IEC70)74--High strength rubber sheathed elevator cable (245IEC74)75---Fluorinated or other equivalent synthetic elastomer rubber sheathed elevator cable (245IEC75)8--Special purpose flexible cable
81--High strength rubber sheathed welding cable Cable (245IEC81) 82 - Fluorine or other equivalent synthetic elastomer rubber sheathed welding cable (245IEC82) B1 is described in GB5013.1-1997 Appendix B (Appendix to the subject) Calculation method for sheath thickness of 245IEC53, 57 and 66 cables in GB5013.4 This sheath thickness calculation method is applicable to the following types of cables with two cores, two cores, four cores or five cores in GB5013.4. 245TEC53: Ordinary strength image sheathed soft wire 245IFC57: Ordinary chloroprene or other equivalent synthetic elastomer expanded sheathed soft wire 245IEC66: Heavy fluoroprene or other equivalent synthetic elastomer sheathed soft cable Note: The calculation method for the thickness of the relay sheath listed in GB5013.4 will not be used in the future. This calculation method is only applicable when these types of cables may be expanded. B2 calculation formula
The following formula should be used:
a) 245 IEC and 57 types:
t 0. 085D + 0. 45
b) 245IEC66 type with conductor cross-section 6mm and below: t, - 0. 13D, + 0. 74
c) 245TEC.66 type with conductor cross-section greater than 6mm: t, = 0. 11/), + 1. 8
Where: t,-.—expansion thickness, mm;
D——assumed diameter of the cable core.mm. The assumed diameter D should be calculated according to the following formula:
D+ -- K(d. + 2t)
Where: 4——Conductor specified diameter.mm
t—-Insulation specified thickness, mm;
K—Cable coefficient.
The assumed diameter di of the nominal cross-section conductor (solid conductor diameter) is shown in the following table: Conductor nominal cross-section, mm
Conductor assumed diameter tt, mm
Conductor nominal cross-section, mm
Conductor assumed diameter di, mm3 Mechanical strength of flexible cables
Flexible cables should be able to withstand bending and other mechanical stresses caused by normal use. When specified in the product standard (GB5013.3, GB5013.4, etc.), the test method specified in 3 of GB5013.2-1997 should be used to check whether it meets the standard requirements.
5.6.3.1 Bending test of flexible relays
See 3.1 of GB 5013.2-1997. GB 5013.1-1997
Flexible cables with a conductor nominal cross-section exceeding 4 mm2 and all single-core cables are not subject to this test. During the test, after 15,000 reciprocating movements, i.e. 30,000 one-way movements, neither current interruption nor short circuit between conductors should occur.
After the test, the sheath (if any) of the 3-core or 3-core cable should be stripped off. Then the voltage test should be carried out on the cable or insulated wire core according to the applicable provisions of 2.2 or 2.3 of GB5013.2-1997. The torsion test voltage shall not exceed 2000V. 5.6.3.2 Static flexure test
See 3.2 of GB 5013. 2-1997. The average value of I\ measured twice (see Figure 2 of GB5013.2-1997) shall not exceed the value specified in Table 4 for welding machine cables and shall not exceed the value specified in Table 5 for elevator cables. Table 4 Static flexure test requirements for welding machine cables Nominal area, mm2
Cable type
Braided elevator cable
Vulcanized rubber sheathed and oxygen or equivalent synthetic elastomer rubber sheathed elevator cable
5.6.3-3 Abrasion test
See 3.3 of GR 5013.2.--1997. Table 5 Static flexure test requirements for elevator cables
12 cores and below
16 and 18 cores
More than 1B cores
12 cores and below
16 and 18 cores
More than 18 cores
Maximum distance \.cm
Maximum distance \,cm
After 20 000 single-stroke movements, the total length of the visible part of the installed test insulation shall not be less than 10 mm. The installed specimens after the test shall be subjected to voltage test according to 2.2 of GB 5013.2-1997. 5.6.3.4 The tensile strength of the central cushion core of the elevator cable shall be shown in 3.4 of GB5013.2-1997.
During the test, the central potential core or the central load-bearing core shall not break. 5.6.3.5 Elevator cable combustion test
See 5 of GB 5013. 2-1997.
The cable shall meet the requirements of GBT 12666. 2 and no short circuit shall occur between the cores during the test. 5.6.3.6 Heat resistance test of textile braided layer
See 6 of G5013.2-1997.
If the shrinking braided layer or any of its components does not melt or carbonize during the test, the test is considered to be qualified. 6 Cable use guidelines
Under consideration.
GB 5013.1—1997
Appendix A
(Clear record of the standard)
Model representation
The various cable models included in this standard are named with two numbers, placed after the IEC245 standard number. The first number indicates the basic classification of the cable, and the second number indicates the specific type in the basic classification. The classification and model are as follows
0——Unsheathed cable for fixed wiring
03——Heat-resistant silicone rubber insulated cable with a maximum conductor temperature of 180 (245LEC03)04——Conductor maximum temperature 110C, 750V hard conductor, kitchen heat ethylene-vinyl acetate rubber insulation single-core unsheathed cable (245 1EC 04)
05-Conductor maximum temperature 110℃, 750V soft conductor, heat-resistant ethylene-vinyl acetate rubber insulation single-core unsheathed cable (245IEC05)
06-Conductor maximum temperature 110℃, 500V hard conductor, heat-resistant ethylene-vinyl acetate rubber or other equivalent synthetic elastomer insulation single-core unsheathed cable (2451EC06)07-*-Conductor maximum temperature 110℃, 500V soft conductor, heat-resistant ethylene-vinyl acetate rubber or other equivalent Appropriate synthetic elastomer insulated single-core unsheathed cable (245IEC07) 5--General purpose flexible cable
51--Braided flexible cord (245IEC51)
53--Ordinary strength rubber sheathed flexible cord (245IEC53) 57--Ordinary chloroprene or other equivalent synthetic elastomer rubber sheathed flexible cord (245IEC57) 58--Chloroprene or other equivalent synthetic elastomer rubber sheathed round cable for decorative concave road (245IEC58), fan cable (245IEC58f)
6---Heavy duty flexible cable
66---Heavy duty fluoroprene or other equivalent synthetic elastomer rubber sheathed flexible cable (245IEC66)7--Special purpose flexible cable
70~--Braided elevator cable (245IEC70)74--High strength rubber sheathed elevator cable (245IEC74)75---Fluorinated or other equivalent synthetic elastomer rubber sheathed elevator cable (245IEC75)8--Special purpose flexible cable
81--High strength rubber sheathed welding cable Cable (245IEC81) 82 - Fluorine or other equivalent synthetic elastomer rubber sheathed welding cable (245IEC82) B1 is described in GB5013.1-1997 Appendix B (Appendix to the subject) Calculation method for sheath thickness of 245IEC53, 57 and 66 cables in GB5013.4 This sheath thickness calculation method is applicable to the following types of cables with two cores, two cores, four cores or five cores in GB5013.4. 245TEC53: Ordinary strength image sheathed soft wire 245IFC57: Ordinary chloroprene or other equivalent synthetic elastomer expanded sheathed soft wire 245IEC66: Heavy fluoroprene or other equivalent synthetic elastomer sheathed soft cable Note: The calculation method for the thickness of the relay sheath listed in GB5013.4 will not be used in the future. This calculation method is only applicable when these types of cables may be expanded. B2 calculation formula
The following formula should be used:
a) 245 IEC and 57 types:
t 0. 085D + 0. 45
b) 245IEC66 type with conductor cross-section 6mm and below: t, - 0. 13D, + 0. 74
c) 245TEC.66 type with conductor cross-section greater than 6mm: t, = 0. 11/), + 1. 8
Where: t,-.—expansion thickness, mm;
D——assumed diameter of the cable core.mm. The assumed diameter D should be calculated according to the following formula:
D+ -- K(d. + 2t)
Where: 4——Conductor specified diameter.mm
t—-Insulation specified thickness, mm;
K—Cable coefficient.
The assumed diameter di of the nominal cross-section conductor (solid conductor diameter) is shown in the following table: Conductor nominal cross-section, mm
Conductor assumed diameter tt, mm
Conductor nominal cross-section, mm
Conductor assumed diameter di, mm3 Mechanical strength of flexible cables
Flexible cables should be able to withstand bending and other mechanical stresses caused by normal use. When specified in the product standard (GB5013.3, GB5013.4, etc.), the test method specified in 3 of GB5013.2-1997 should be used to check whether it meets the standard requirements.
5.6.3.1 Bending test of flexible relays
See 3.1 of GB 5013.2-1997. GB 5013.1-1997
Flexible cables with a conductor nominal cross-section exceeding 4 mm2 and all single-core cables are not subject to this test. During the test, after 15,000 reciprocating movements, i.e. 30,000 one-way movements, neither current interruption nor short circuit between conductors should occur.
After the test, the sheath (if any) of the 3-core or 3-core cable should be stripped off. Then the voltage test should be carried out on the cable or insulated wire core according to the applicable provisions of 2.2 or 2.3 of GB5013.2-1997. The torsion test voltage shall not exceed 2000V. 5.6.3.2 Static flexure test
See 3.2 of GB 5013. 2-1997. The average value of I\ measured twice (see Figure 2 of GB5013.2-1997) shall not exceed the value specified in Table 4 for welding machine cables and shall not exceed the value specified in Table 5 for elevator cables. Table 4 Static flexure test requirements for welding machine cables Nominal area, mm2
Cable type
Braided elevator cable
Vulcanized rubber sheathed and oxygen or equivalent synthetic elastomer rubber sheathed elevator cable
5.6.3-3 Abrasion test
See 3.3 of GR 5013.2.--1997. Table 5 Static flexure test requirements for elevator cables
12 cores and below
16 and 18 cores
More than 1B cores
12 cores and below
16 and 18 cores
More than 18 cores
Maximum distance \.cm
Maximum distance \,cm
After 20 000 single-stroke movements, the total length of the visible part of the installed test insulation shall not be less than 10 mm. The installed specimens after the test shall be subjected to voltage test according to 2.2 of GB 5013.2-1997. 5.6.3.4 The tensile strength of the central cushion core of the elevator cable shall be shown in 3.4 of GB5013.2-1997.
During the test, the central potential core or the central load-bearing core shall not break. 5.6.3.5 Elevator cable combustion test
See 5 of GB 5013. 2-1997.
The cable shall meet the requirements of GBT 12666. 2 and no short circuit shall occur between the cores during the test. 5.6.3.6 Heat resistance test of textile braided layer
See 6 of G5013.2-1997.
If the shrinking braided layer or any of its components does not melt or carbonize during the test, the test is considered to be qualified. 6 Cable use guidelines
Under consideration.
GB 5013.1—1997
Appendix A
(Clear record of the standard)
Model representation
The various cable models included in this standard are named with two numbers, placed after the IEC245 standard number. The first number indicates the basic classification of the cable, and the second number indicates the specific type in the basic classification. The classification and model are as follows
0——Unsheathed cable for fixed wiring
03——Heat-resistant silicone rubber insulated cable with a maximum conductor temperature of 180 (245LEC03)04——Conductor maximum temperature 110C, 750V hard conductor, kitchen heat ethylene-vinyl acetate rubber insulation single-core unsheathed cable (245 1EC 04)
05-Conductor maximum temperature 110℃, 750V soft conductor, heat-resistant ethylene-vinyl acetate rubber insulation single-core unsheathed cable (245IEC05)
06-Conductor maximum temperature 110℃, 500V hard conductor, heat-resistant ethylene-vinyl acetate rubber or other equivalent synthetic elastomer insulation single-core unsheathed cable (2451EC06)07-*-Conductor maximum temperature 110℃, 500V soft conductor, heat-resistant ethylene-vinyl acetate rubber or other equivalent Appropriate synthetic elastomer insulated single-core unsheathed cable (245IEC07) 5--General purpose flexible cable
51--Braided flexible cord (245IEC51)
53--Ordinary strength rubber sheathed flexible cord (245IEC53) 57--Ordinary chloroprene or other equivalent synthetic elastomer rubber sheathed flexible cord (245IEC57) 58--Chloroprene or other equivalent synthetic elastomer rubber sheathed round cable for decorative concave road (245IEC58), fan cable (245IEC58f)
6---Heavy duty flexible cable
66---Heavy duty fluoroprene or other equivalent synthetic elastomer rubber sheathed flexible cable (245IEC66)7--Special purpose flexible cable
70~--Braided elevator cable (245IEC70)74--High strength rubber sheathed elevator cable (245IEC74)75---Fluorinated or other equivalent synthetic elastomer rubber sheathed elevator cable (245IEC75)8--Special purpose flexible cable
81--High strength rubber sheathed welding cable Cable (245IEC81) 82 - Fluorine or other equivalent synthetic elastomer rubber sheathed welding cable (245IEC82) B1 is described in GB5013.1-1997 Appendix B (Appendix to the subject) Calculation method for sheath thickness of 245IEC53, 57 and 66 cables in GB5013.4 This sheath thickness calculation method is applicable to the following types of cables with two cores, two cores, four cores or five cores in GB5013.4. 245TEC53: Ordinary strength image sheathed soft wire 245IFC57: Ordinary chloroprene or other equivalent synthetic elastomer expanded sheathed soft wire 245IEC66: Heavy fluoroprene or other equivalent synthetic elastomer sheathed soft cable Note: The calculation method for the thickness of the relay sheath listed in GB5013.4 will not be used in the future. This calculation method is only applicable when these types of cables may be expanded. B2 calculation formula
The following formula should be used:
a) 245 IEC and 57 types:
t 0. 085D + 0. 45
b) 245IEC66 type with conductor cross-section 6mm and below: t, - 0. 13D, + 0. 74
c) 245TEC.66 type with conductor cross-section greater than 6mm: t, = 0. 11/), + 1. 8
Where: t,-.—expansion thickness, mm;
D——assumed diameter of the cable core.mm. The assumed diameter D should be calculated according to the following formula:
D+ -- K(d. + 2t)
Where: 4——Conductor specified diameter.mm
t—-Insulation specified thickness, mm;
K—Cable coefficient.
The assumed diameter di of the nominal cross-section conductor (solid conductor diameter) is shown in the following table: Conductor nominal cross-section, mm
Conductor assumed diameter tt, mm
Conductor nominal cross-section, mm
Conductor assumed diameter di, mmmm2
Cable type
Braided elevator cable
Vulcanized rubber sheathed and oxygen or equivalent synthetic elastomer rubber sheathed elevator cable
5.6.3-3 Abrasion test
See 3.3 of GR 5013.2.--1997. Table 5 Static flexure test requirements for elevator cables
12 cores and below
16 and 18 cores
More than 1B cores
12 cores and below
16 and 18 cores
More than 18 cores
Maximum distance\.cm
Maximum distance\,cm
After 20,000 one-way movements, the total length of the visible part of the installed test insulation shall not be less than 10 mm. The installed specimens after the test shall be in accordance with GB 5.6.3.4 For the tensile strength of the central core of the elevator cable, see 3.4 of GB5013.2-1997.
During the test, the central core or the central bearing core shall not break. 5.6.3.5 For the combustion test of elevator cables, see 5 of GB 5013. 2-1997.
The cable shall meet the requirements of GBT 12666. 2 and no short circuit shall occur between the cores during the test. 5.6.3.6 For the heat resistance test of the textile braided layer, see 6 of GB5013.2-1997.
If the shrinking layer or any of its components does not melt or carbonize during the test, the test is considered to be qualified. 6 Cable use guidelines
Under consideration.
GB 5013.1—1997
Appendix A
(Clear record of the standard)
Model representation
The various cable models included in this standard are named with two numbers, placed after the IEC245 standard number. The first number indicates the basic classification of the cable, and the second number indicates the specific type in the basic classification. The classification and model are as follows
0——Unsheathed cable for fixed wiring
03——Heat-resistant silicone rubber insulated cable with a maximum conductor temperature of 180 (245LEC03)04——Conductor maximum temperature 110C, 750V hard conductor, kitchen heat ethylene-vinyl acetate rubber insulation single-core unsheathed cable (245 1EC 04)
05-Conductor maximum temperature 110℃, 750V soft conductor, heat-resistant ethylene-vinyl acetate rubber insulation single-core unsheathed cable (245IEC05)
06-Conductor maximum temperature 110℃, 500V hard conductor, heat-resistant ethylene-vinyl acetate rubber or other equivalent synthetic elastomer insulation single-core unsheathed cable (2451EC06)07-*-Conductor maximum temperature 110℃, 500V soft conductor, heat-resistant ethylene-vinyl acetate rubber or other equivalent Appropriate synthetic elastomer insulated single-core unsheathed cable (245IEC07) 5--General purpose flexible cable
51--Braided flexible cord (245IEC51)
53--Ordinary strength rubber sheathed flexible cord (245IEC53) 57--Ordinary chloroprene or other equivalent synthetic elastomer rubber sheathed flexible cord (245IEC57) 58--Chloroprene or other equivalent synthetic elastomer rubber sheathed round cable for decorative concave road (245IEC58), fan cable (245IEC58f)
6---Heavy duty flexible cable
66---Heavy duty fluoroprene or other equivalent synthetic elastomer rubber sheathed flexible cable (245IEC66)7--Special purpose flexible cable
70~--Braided elevator cable (245IEC70)74--High strength rubber sheathed elevator cable (245IEC74)75---Fluorinated or other equivalent synthetic elastomer rubber sheathed elevator cable (245IEC75)8--Special purpose flexible cable
81--High strength rubber sheathed welding cable Cable (245IEC81) 82 - Fluorine or other equivalent synthetic elastomer rubber sheathed welding cable (245IEC82) B1 is described in GB5013.1-1997 Appendix B (Appendix to the subject) Calculation method for sheath thickness of 245IEC53, 57 and 66 cables in GB5013.4 This sheath thickness calculation method is applicable to the following types of cables with two cores, two cores, four cores or five cores in GB5013.4. 245TEC53: Ordinary strength image sheathed soft wire 245IFC57: Ordinary chloroprene or other equivalent synthetic elastomer expanded sheathed soft wire 245IEC66: Heavy fluoroprene or other equivalent synthetic elastomer sheathed soft cable Note: The calculation method for the thickness of the relay sheath listed in GB5013.4 will not be used in the future. This calculation method is only applicable when these types of cables may be expanded. B2 calculation formula
The following formula should be used:
a) 245 IEC and 57 types:
t 0. 085D + 0. 45
b) 245IEC66 type with conductor cross-section 6mm and below: t, - 0. 13D, + 0. 74
c) 245TEC.66 type with conductor cross-section greater than 6mm: t, = 0. 11/), + 1. 8
Where: t,-.—expansion thickness, mm;
D——assumed diameter of the cable core.mm. The assumed diameter D should be calculated according to the following formula:
D+ -- K(d. + 2t)
Where: 4——Conductor specified diameter.mm
t—-Insulation specified thickness, mm;
K—Cable coefficient.
The assumed diameter di of the nominal cross-section conductor (solid conductor diameter) is shown in the following table: Conductor nominal cross-section, mm
Conductor assumed diameter tt, mm
Conductor nominal cross-section, mm
Conductor assumed diameter di, mmmm2
Cable type
Braided elevator cable
Vulcanized rubber sheathed and oxygen or equivalent synthetic elastomer rubber sheathed elevator cable
5.6.3-3 Abrasion test
See 3.3 of GR 5013.2.--1997. Table 5 Static flexure test requirements for elevator cables
12 cores and below
16 and 18 cores
More than 1B cores
12 cores and below
16 and 18 cores
More than 18 cores
Maximum distance\.cm
Maximum distance\,cm
After 20,000 one-way movements, the total length of the visible part of the installed test insulation shall not be less than 10 mm. The installed specimens after the test shall be in accordance with GB 5.6.3.4 For the tensile strength of the central core of the elevator cable, see 3.4 of GB5013.2-1997.
During the test, the central core or the central bearing core shall not break. 5.6.3.5 For the combustion test of elevator cables, see 5 of GB 5013. 2-1997.
The cable shall meet the requirements of GBT 12666. 2 and no short circuit shall occur between the cores during the test. 5.6.3.6 For the heat resistance test of the textile braided layer, see 6 of GB5013.2-1997.
If the shrinking layer or any of its components does not melt or carbonize during the test, the test is considered to be qualified. 6 Cable use guidelines
Under consideration.
GB 5013.1—1997
Appendix A
(Clear record of the standard)
Model representation
The various cable models included in this standard are named with two numbers, placed after the IEC245 standard number. The first number indicates the basic classification of the cable, and the second number indicates the specific type in the basic classification. The classification and model are as follows
0——Unsheathed cable for fixed wiring
03——Heat-resistant silicone rubber insulated cable with a maximum conductor temperature of 180 (245LEC03)04——Conductor maximum temperature 110C, 750V hard conductor, kitchen heat ethylene-vinyl acetate rubber insulation single-core unsheathed cable (245 1EC 04)
05-Conductor maximum temperature 110℃, 750V soft conductor, heat-resistant ethylene-vinyl acetate rubber insulation single-core unsheathed cable (245IEC05)
06-Conductor maximum temperature 110℃, 500V hard conductor, heat-resistant ethylene-vinyl acetate rubber or other equivalent synthetic elastomer insulation single-core unsheathed cable (2451EC06)07-*-Conductor maximum temperature 110℃, 500V soft conductor, heat-resistant ethylene-vinyl acetate rubber or other equivalent Appropriate synthetic elastomer insulated single-core unsheathed cable (245IEC07) 5--General purpose flexible cable
51--Braided flexible cord (245IEC51)
53--Ordinary strength rubber sheathed flexible cord (245IEC53) 57--Ordinary chloroprene or other equivalent synthetic elastomer rubber sheathed flexible cord (245IEC57) 58--Chloroprene or other equivalent synthetic elastomer rubber sheathed round cable for decorative concave road (245IEC58), fan cable (245IEC58f)
6---Heavy duty flexible cable
66---Heavy duty fluoroprene or other equivalent synthetic elastomer rubber sheathed flexible cable (245IEC66)7--Special purpose flexible cable
70~--Braided elevator cable (245IEC70)74--High strength rubber sheathed elevator cable (245IEC74)75---Fluorinated or other equivalent synthetic elastomer rubber sheathed elevator cable (245IEC75)8--Special purpose flexible cable
81--High strength rubber sheathed welding cable Cable (245IEC81) 82 - Fluorine or other equivalent synthetic elastomer rubber sheathed welding cable (245IEC82) B1 is described in GB5013.1-1997 Appendix B (Appendix to the subject) Calculation method for sheath thickness of 245IEC53, 57 and 66 cables in GB5013.4 This sheath thickness calculation method is applicable to the following types of cables with two cores, two cores, four cores or five cores in GB5013.4. 245TEC53: Ordinary strength image sheathed soft wire 245IFC57: Ordinary chloroprene or other equivalent synthetic elastomer expanded sheathed soft wire 245IEC66: Heavy fluoroprene or other equivalent synthetic elastomer sheathed soft cable Note: The calculation method for the thickness of the relay sheath listed in GB5013.4 will not be used in the future. This calculation method is only applicable when these types of cables may be expanded. B2 calculation formula
The following formula should be used:
a) 245 IEC and 57 types:
t 0. 085D + 0. 45
b) 245IEC66 type with conductor cross-section 6mm and below: t, - 0. 13D, + 0. 74
c) 245TEC.66 type with conductor cross-section greater than 6mm: t, = 0. 11/), + 1. 8
Where: t,-.—expansion thickness, mm;
D——assumed diameter of the cable core.mm. The assumed diameter D should be calculated according to the following formula:
D+ -- K(d. + 2t)
Where: 4——Conductor specified diameter.mm
t—-Insulation specified thickness, mm;
K—Cable coefficient.
The assumed diameter di of the nominal cross-section conductor (solid conductor diameter) is shown in the following table: Conductor nominal cross-section, mm
Conductor assumed diameter tt, mm
Conductor nominal cross-section, mm
Conductor assumed diameter di, mm500V rigid conductor, heat-resistant ethylene-vinyl acetate rubber or other equivalent synthetic elastomer insulation single-core unsheathed cable (2451EC06) 07-*-Search maximum temperature 110℃, 500V soft conductor, heat-resistant ethylene-vinyl acetate rubber or other equivalent synthetic elastomer insulation single-core unsheathed cable (245IEC07) 5--General purpose flexible cable
51--Braided flexible wire (245IEC51)
53--Ordinary strength rubber sheathed flexible wire (245IEC53) 57--Ordinary chloroprene or other equivalent synthetic elastomer rubber sheathed flexible wire (245IEC57) 58---Chloroprene or other equivalent synthetic elastomer rubber sheathed round cable for decorative concave road (245IEC58), fan cable (245IEC58f)
6---Heavy duty flexible cable
66--Heavy duty chloroprene or other equivalent synthetic elastomer rubber tt|| Calculation method of sheath thickness of 245IEC53, 57 and 66 type cables in GB5013.4 This method of sheath thickness calculation is applicable to the following types of cables with two cores, two cores, four cores or five cores in GB5013.4. 245TEC53: Ordinary strength fluoroprene sheathed flexible cord
245IFC57: Ordinary chloroprene or other equivalent synthetic elastomer expanded sheathed flexible cord 245IEC66: Heavy fluoroprene or other equivalent synthetic elastomer sheathed flexible cable Note: The calculation method for the thickness of the relay sheath listed in GB5013.4 will be used in the future. This calculation method is only applicable when these types of cables may be expanded. B2 calculation formula
The following formula should be used:
a) 245 IEC and 57 types:
t 0. 085D + 0. 45
b) 245IEC66 type with conductor cross-section 6mm and below: t, - 0. 13D, + 0. 74
c) 245TEC.66 type with conductor cross-section greater than 6mm: t, = 0. 11/), + 1. 8
Where: t,-.—expansion thickness, mm;
D——assumed diameter of the cable core.mm. The assumed diameter D should be calculated according to the following formula:
D+ -- K(d. + 2t)
Where: 4——Conductor specified diameter.mm
t—-Insulation specified thickness, mm;
K—Cable coefficient.
The assumed diameter di of the nominal cross-section conductor (solid conductor diameter) is shown in the following table: Conductor nominal cross-section, mm
Conductor assumed diameter tt, mm
Conductor nominal cross-section, mm
Conductor assumed diameter di, mm500V rigid conductor, heat-resistant ethylene-vinyl acetate rubber or other equivalent synthetic elastomer insulation single-core unsheathed cable (2451EC06) 07-*-Search maximum temperature 110℃, 500V soft conductor, heat-resistant ethylene-vinyl acetate rubber or other equivalent synthetic elastomer insulation single-core unsheathed cable (245IEC07) 5--General purpose flexible cable
51--Braided flexible wire (245IEC51)
53--Ordinary strength rubber sheathed flexible wire (245IEC53) 57--Ordinary chloroprene or other equivalent synthetic elastomer rubber sheathed flexible wire (245IEC57) 58---Chloroprene or other equivalent synthetic elastomer rubber sheathed round cable for decorative concave road (245IEC58), fan cable (245IEC58f)
6---Heavy duty flexible cable
66--Heavy duty chloroprene or other equivalent synthetic elastomer rubber tt|| Calculation method of sheath thickness of 245IEC53, 57 and 66 type cables in GB5013.4 This method of sheath thickness calculation is applicable to the following types of cables with two cores, two cores, four cores or five cores in GB5013.4. 245TEC53: Ordinary strength fluoroprene sheathed flexible cord
245IFC57: Ordinary chloroprene or other equivalent synthetic elastomer expanded sheathed flexible cord 245IEC66: Heavy fluoroprene or other equivalent synthetic elastomer sheathed flexible cable Note: The calculation method for the thickness of the relay sheath listed in GB5013.4 will be used in the future. This calculation method is only applicable when these types of cables may be expanded. B2 calculation formula
The following formula should be used:
a) 245 IEC and 57 types:
t 0. 085D + 0. 45
b) 245IEC66 type with conductor cross-section 6mm and below: t, - 0. 13D, + 0. 74
c) 245TEC.66 type with conductor cross-section greater than 6mm: t, = 0. 11/), + 1. 8
Where: t,-.—expansion thickness, mm;
D——assumed diameter of the cable core.mm. The assumed diameter D should be calculated according to the following formula:
D+ -- K(d. + 2t)
Where: 4——Conductor specified diameter.mm
t—-Insulation specified thickness, mm;
K—Cable coefficient.
The assumed diameter di of the nominal cross-section conductor (solid conductor diameter) is shown in the following table: Conductor nominal cross-section, mm
Conductor assumed diameter tt, mm
Conductor nominal cross-section, mm
Conductor assumed diameter di, mm
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