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JB/T 8734.4-2012 English PDF (JBT8734.4-2012)

JB/T 8734.4-2012 English PDF (JBT8734.4-2012)

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JB/T 8734.4-2012: Polyvinyl chloride insulated cables and wires and cords of rated voltages up to and including 450/750 V - Part 4: Insulated wires for internal wiring of equipment

This Part of JB/T 8734 specifies the operating characteristics, models, specifications, technical requirements and inspection of wires for internal wiring. This Part applies to copper core polyvinyl chloride insulated wires for internal wiring of electric appliance, instrument, electronic equipment and automation equipment of AC rated voltage up to and including 300/300V.
JB/T ??8723.4?€?2012
Translated??English??of??Chinese??Standard.??JB/T8723.4?€?2012
JB
ICS 29.060.20
K 13
Record No.. 36479-2012
INDUSTRY STANDARD
OF THE PEOPLE REPUBLIC OF CHINA
Replacing JB/T 8734.4-1998
Polyvinyl chloride insulated cables and wires and
cords of rated voltages up to and including 450/750V -
Part 4. Insulated wires for internal wiring of equipment
ISSUED ON. MAY 24, 2012
IMPLEMENTED ON. NOVEMBER 01, 2012
Issued by. Ministry of Industry and Information Technology of the
PEOPLE Republic of China
Table of Contents
Foreword??...??3
1 Scope??...??5
2 Normative??references??...??5
3 Operational??characteristics??...??6
4 Models??...??6
5 Specifications??...??7
6 Technical??requirements??...??7
6.1 General??principles??...??7
6.2 Conductor??...??8
6.3 Insulation??...??8
6.4 Insulated??core??cabling??...??8
6.5 Sheath??...??8
6.6 Appearance??dimension??...??8
7 Inspection??...??9
Foreword
JB/T 8734 Polyvinyl chloride insulated cables and wires and cords of rated voltages up to and including 450/750V consists of 6 parts as follows.
?€? Part 1. General requirements;
?€? Part 2. Insulated cables and wires for fixed wiring;
?€? Part 3. Cords and cables for connecting;
?€? Part 4. Insulated wires for internal wiring of equipment;
?€? Part 5. Screened wires;
?€? Part 6. Lift cables.
This is part 4 of JB/T 8734.
This part was drafted according to the rules specified in GB/T 1.1-2009 This part will replace JB/T 8734.4-1998 Polyvinyl chloride insulated cables and wires and cords of rated voltages up to and including 450/750V Part 4. Insulated wires for internal wiring of equipment. Compared with JB/T 8734.4-1998, main technical changes of this part are as follows.
?€? Change the chapter name and relevant reference standards in Normative References (see Chapter 2; Chapter 2 in 1998 edition);
?€? Add the specifications and corresponding requirements for AVVR cables?€? conductor (see Table 2 and Table 7).
This part was proposed by China Machinery Industry Federation.
This part shall be under the jurisdiction of National Technical Committee (SAC/TC213) on Wire and Cables of Standardization Administration of China.
The responsible drafting organization of this part. Shanghai Cable Research Institute. The participating drafting organizations of this part. Guangzhou Cable Factory, Hunan Jinbei Cable Co., Ltd, Kunming Cables Co., Ltd, Baosheng Science and Technology Innovation Co., Ltd, Nanchang Cables Co., Ltd, Shanghai Nanyang-Fujikura Cable Co., Ltd, Shanghai Laogang Shenling Electric Cable Co., Ltd, Shenzhen Liajiaxiang Science and Technology Co., Ltd, Tianjin Jinshan Electric Wire and Cable Ltd, and ShangHai Panda Wire and Cable Co., Ltd.
The chief drafting staffs of this part. Ding Xiaoqing, He Shaoqing, Ai Weimin, He Wenjun, Chen Jinmei, Yin Binxia, Xu Qiao, Gu Youming, Huang Donglian, Zheng Guojun, Zhou Xiaorong, Xiao Jidong, Yan Yongchang, Lu Yanhong, and Wu Min.
This part replaces the following historical edition.
?€? JB/T 8734.4-1998.
Polyvinyl chloride insulated cables and wires and cords of rated voltages up to and including 450/750V - Part 4. Insulated wires for internal wiring of equipment
1 Scope
This Part of JB/T 8734 specifies the operating characteristics, models, specifications, technical requirements and inspection of wires for internal wiring.
This Part applies to copper core polyvinyl chloride insulated wires for internal wiring of electric appliance, instrument, electronic equipment and automation equipment of AC rated voltage U0/U up to and including 300/300V.
2 Normative references
The articles contained in the following documents have become part of this document when they are quoted herein. For the dated documents so quoted, all the modifications (Including all corrections) or revisions made thereafter shall be applicable to this document.
GB/T 2951.11-2008 Common test methods for insulating and sheathing materials of electric and optical cables - Part 11. Methods for general application - Measurement of thickness and overall dimensions - Tests for determining the mechanical properties GB/T 2951.12-2008 Common test methods for insulating and sheathing materials of electric and optical cables - Part 12. Methods for general application - Thermal ageing methods
GB/T 2951.13-2008 Common test methods for insulating and sheathing materials of electric and optical cables - Part 13. Methods for general application - Measurement for determining the density - Water absorption tests - Shrinkage test
GB/T 2951.14-2008 Common test methods for insulating and sheathing materials of electric and optical cables - Part 14. Methods for general application - Test at low temperature
GB/T 2951.31-2008 Common test methods for insulating and sheathing materials of electric and optical cables - Part 31. Methods specific to PVC compounds - Pressure test at high temperature - Test for resistance to cracking
GB/T 2951.32-2008 Common test methods for insulating and sheathing materials of electric and optical cables - Part 32. Methods specific to PVC compounds - Loss of mass test - Thermal stability test
GB/T 5023.2-2008 Polyvinyl chloride insulated cables of rated voltages up to and including 450/750V - Part 2. Test methods
GB/T 18380.12-2008 Test on electric and optical fibre cables under fire conditions - Part 12. Test for vertical flame propagation for a single insulated wire or cable - Procedure for 1kW pre-mixed flame
GB/T 18380.22-2008 Tests on electric and optical fibre cables under fire conditions - Part 22. Test for vertical flame propagation for a single small insulated wire or cable - Procedure for diffusion flame
JB/T 8734.1-2012 Polyvinyl chloride insulated cables and wires and cords of rated voltages up to and including 450/750V - Part 1. General requirements
3 Operational characteristics
3.1 Cable?€?s rated voltage U0/U is 300/300V.
3.2 Allowable long-term working temperature of AV-90, AVR-90 type wires shall not exceed 90??C. Allowable long-term working temperature of other types wires and cables shall not exceed 70??C.
Note. When the operating environment of wires can prevent thermoplastic flow and allow reducing insulation resistance, for the polyvinyl chloride compound which can be used continuously at 90??C, its working temperature can be increased to 105??C, on the premise of shortening the total working hours.
4 Models
Wires and cables?€? models are shown in Table 1.
2 Structure size inspection
2.1 Structure inspection T, S T, S T, S T, S T, S T, S
Normal eyesight
inspection
2.2 Conductor - conduction test R R R R R R JB/T 8734.1-2012 5.5
23 Insulation thickness T, S T, S T, S T, S T, S T, S GB/T 5023.2-2008 1.9 2.4 Sheath thickness - - - - T, S - GB/T 5023.2 2008 1.10
2.5
External diameter or appearance
dimension
T, S T, S T, S T, S T, S T, S GB/T 5023.2-2008 1.11
2.6 Ovality - - - - T, S - GB/T 5023.2-2008 1.11
Mechanical properties of the
insulation
3.1 Tension test before aging T T T T T T GB/T 2951.11-2008 9.1
3.2 Tension test after aging T T T T T T GB/T 2951.12-2008 8.13.1
GB/T 2951.11-2008 9.1
3.3 Weightlessness test T T T T T T GB/T 2951.32-2008 8.1
4 Insulation thermal shrinkage test T T T T T T GB/T 2951.13-2008
Chapter
Mechanical properties of the
sheath
5.1 Tension test before aging - - - - T - GB/T 2951.11-2008 9.2
5.2 Tension test after aging - - - - T - GB/T 2951.12-2008 8.1.3.1
GB/T 2951.11-2008 9.2
5.3 Weightlessness test - - - - T - GB/T 2951-32-2008 8.2
6 High temperature pressure test
6.1 Insulation T T T T T T GB/T 2951.31-2008 8.1
6.2 Sheath - - - - T - GB/T 2951.31-2008 8.2
Low temperature flexibility and
shock strength
7.1
Insulation low temperature winding
test
T T T T T T GB/T 2951.14-2008 8.1
7.2
Sheath low-temperature winding
test
- - - - T - GB/T 2951.14-2008 8.2
7.3
Sheath low-temperature Tension
test
- - - - T - GB/T 2951.14-2008 8.4
7.4
Finished wires and cables - low
temperature shock test
- - - - T - GB/T 2951.14-2008 8.5
8 Thermal shock test
8.1 Insulation T T T T T T GB/T 2951.31-2008 9.1
8.2 Sheath - - - - T - GB/T 2951.31-2008 9.2
Mechanical strength test of
finished wires and cables
9.1 Insulated...

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