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JB/T 8734.4-2012

Chinese Standard: 'JB/T 8734.4-2012'
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Detail Information of JB/T 8734.4-2012; JB/T8734.4-2012
Description (Translated English): 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
Sector / Industry: Mechanical & Machinery Industry Standard (Recommended)
Classification of Chinese Standard: K13
Classification of International Standard: 29.060.20
Word Count Estimation: 11,191
Date of Issue: 2012-05-24
Date of Implementation: 2012-11-01
Older Standard (superseded by this standard): JB/T 8734.4-1998
Quoted Standard: GB/T 2951.11-2008; GB/T 2951.12-2008; GB/T 2951.13-2008; GB/T 2951.14-2008; GB/T 2951.31-2008; GB/T 2951.32-2008; GB/T 5023.2-2008; GB/T 18380.12-2008; GB/T 18380.22-2008; JB/T 8734.1-2012
Drafting Organization: Shanghai Electric Cable Research Institute
Administrative Organization: National Standardization Technical Committee of wire and cable
Regulation (derived from): Ministry of Industry and Information Technology Bulletin 2012 No. 20; industry standard filing Notice 2012 No. 7 (No. 151 overall)
Summary: This standard specifies the use of wire installation features, models, specifications, technical requirements and testing. This part is suitable for AC rated voltage Uo/U is 300/300 V and below electrical, instrumentation and electronic equipment and auto

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’S 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
额定电压 450/750V 及以下聚氯乙烯绝缘电缆电线和
软线 第 4部分.安装用电线
ISSUED ON. MAY 24, 2012
IMPLEMENTED ON. NOVEMBER 01, 2012
Issued by. Ministry of Industry and Information Technology of the
People’s 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 &
Technology Co., Ltd, Tianjin Jinshan Electric Wire & Cable Ltd, and ShangHai Panda Wire
& 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 Weightle......
Related standard:   JB/T 8734.1-2016  JB/T 8734.2-2016
   
 
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