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JB/T 8734.2-2012 English PDF (JBT8734.2-2012)

JB/T 8734.2-2012 English PDF (JBT8734.2-2012)

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JB/T 8734.2-2012: Polyvinyl chloride insulated cables and wires and cords of rated voltages up to and including 450/750 V - Part 2: Insulated cables and wires for fixed wiring

This Part of JB/T 8734 specifies the operating characteristics, models, specifications, technical requirements, and inspection of cables and wires for fixed wiring. This Part applies to copper core or aluminum core polyvinyl chloride insulated cables and wires that are used in AC rated voltage up to and including 450/750V.
JB/T ??8723.2?€?2012
Translated??English??of??Chinese??Standard.??JB/T8723.2?€?2012
JB
ICS 29.060.20
K 13
Record No.. 36477-2012
INDUSTRY STANDARD
OF THE PEOPLE REPUBLIC OF CHINA
Replacing JB/T 8734.2-1998
Polyvinyl chloride insulated cables and wires and
cords of rated voltages up to and including 450/750V -
Part 2. Insulated cables and wires for fixed wiring
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 Operating??characteristics??...??6
4 Models??...??6
5 Specifications??...??7
6 Technical??requirements??...??7
6.1 General??principle??...??7
6.2 Conductor??...??7
6.3 Insulation??...??7
6.4 Insulated??core??cabling??...??7
6.5 Sheath??...??7
6.6 Appearance??dimension??...??8
7 Inspection??...??11
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 2 of JB/T 8734.
This part is drafted according to the rules specified in GB/T 1.1-2009. This part will replace JB/T 8734.2-1998 Polyvinyl chloride insulated cables and wires and cords of rated voltages up to and including 450/750V Part 2. Insulated cables and wires for fixed wiring. Compared with JB/T 8734.2-1998, main technical changes of this part are as follows.
?€? Change the chapter?€?s name and relevant reference standards in Normative References (see Chapter 2; Chapter 2 in 1998 edition);
?€? Add the nominal cross-section area and corresponding requirements for cable conductor (see Table 2; Table 5 and Table 6);
?€? Change the upper limit of BVR cables with nominal cross-section areas of 10 mm?? and 16 mm?? (see Table 5; Table 5 in 1998 edition).
This part was proposed by China Machinery Industry Federation.
This Standard 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. 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, Guangzhou Cable Factory, Kunming Cables Co., Ltd, Hunan Jinbei Cable Co., Ltd, Tianjin Jinshan Electric Wire and Cable Ltd, and ShangHai Panda Wire and Cable Co., Ltd.
The main drafting staffs of this part. Lu Yanhong, Chen Jinmei, Yin Binxia, Xu Qiao, Gu Youming, Huang Donglian, He Shaoqing, He Wenjun, Ai Weimin, Zheng Guojun, Zhou Xiaorong, Xiao Jidong, Yan Yongchang, Ding Xiaoqing, and Wu Min.
This standard replaces the following historical edition.
?€? JB/T 8734.2-1998.
Polyvinyl chloride insulated cables and wires and cords of
rated voltages up to and including 450/750V - Part 2.
Insulated cables and wires for fixed wiring
1 Scope
This Part of JB/T 8734 specifies the operating characteristics, models, specifications, technical requirements, and inspection of cables and wires for fixed wiring. This Part applies to copper core or aluminum core polyvinyl chloride insulated cables and wires that are used in AC rated voltage U0/U up to and including 450/750V. 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 2951.14-2008 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
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 Operating characteristics
3.1 The rated voltages U0/U of wires and cables are 450/750V and 300/500V. 3.2 Allowable long-term working temperature of all types of cables and wires shall not exceed 70??C.
3.3 Laying temperature of cables and wires shall not below 0??C. The allowable bending radius of cables and wires, with external diameter (D) of less than 25mm, shall be not less than 4D. And allowable bending radius of cables and wires, with external diameter (D) of 25mm or above, shall not be less than 6D.
4 Models
Cables and wires?€? models are shown in Table 1.
Table 1 Models and names
Models Names Primary usage
BV Copper core polyvinyl chloride insulated wire Fixed wiring
BLV Aluminum core polyvinyl chloride insulated cable Fixed wiring
BVR Copper core polyvinyl chloride insulated flexible cable
Flexible site is required during fixing
the wires
BVV Copper core polyvinyl chloride insulated polyvinyl chloride sheathed round cable Fixed wiring BLVV Aluminum core polyvinyl chloride insulated polyvinyl chloride sheathed round cable Fixed wiring BVVB Copper core polyvinyl chloride insulated polyvinyl chloride sheathed flat cable Fixed wiring BLVVB Aluminum core polyvinyl chloride insulated polyvinyl chloride sheathed flat cable Fixed wiring 5 Specifications
Specifications of cables and wires are shown in Table 2.
Table 2 Specifications
Models Rated voltage V
Core
number
Nominal sectional area of
conductor with the unit of mm2
Structural parameters
table number
BV 300/500 1 0.75-1.0 Table 3
BLV 450/750 1 2.5-400 Table 4
BVR 450/750 1 0.75-185 Table 5
BVV 300/500 1 0.75-185 Table 6
BLVV 300/500 1 2.5-185 Table 6
BVVB 300/500 2-3 0.75-10 Table 7
BLVVB 300/500 2-3 2.5-10 Table 7
6 Technical requirements
6.1 General principle
In addition to comply with the technical requirements specified in this part, the cables and wires shall also comply with the provisions of JB/T 8734.1-2012.
6.2 Conductor
Core number and structure of conductor shall comply with the provisions in Table 3 - Table 7.
6.3 Insulation
The insulation wrapped on the conductor shall be polyvinyl chloride compound with code of PVC/C.
Insulation thickness shall comply with the provisions of Table 3 - Table 7. Insulation resistance shall not be less than the values specified in Table 3 - Table 7. 6.4 Insulated core cabling
Insulated core of flat cable shall be placed in parallel.
6.5 Sheath
The sheath wrapped on the insulation or finished cable core shall be polyvinyl chloride compound with code of PVC/ST4.
cables - low
temperature shock test
7 Thermal shock test
7.1 Insulation T T T T T GB/T 2951.31-2008 9.1
7.2 Sheath - - - T T GB/T 2951.31-2008 9.2
8 Flame non-propagation test T T T T T
GB/T
18380.12-2008
9 Mark - rubbing resistance inspection T, S T, S T, S T, S T, S GB/T 5023.2-2008 1.8

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