JB/T 8734.2-2012Polyvinyl 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 (English PDF)
额定电压450/750V 及以下聚氯乙烯绝缘电缆电线和软线 第2部分：固定布线用电缆电线
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Issued by
MIIT
Level / Type
Industry · Recommended
Issue date
May 24, 2012
Implementation date
November 1, 2012
Scope
JB/T 8734.2-2012 is the English-translated version of 额定电压450/750V 及以下聚氯乙烯绝缘电缆电线和软线 第2部分：固定布线用电缆电线.
JB/T 8734.2-2012 is the Chinese standard "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".
Its scope clause reads: 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.
Its clauses include operating characteristics; models; specifications; technical requirements; thermal shock test.
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Document preview — JB/T 8734.2-2012
National Standard of the People's Republic of China
- Replacing
- JB/T 8734.2-1998
Issued by: Ministry of Industry and Information Technology of the People's Republic of China
Contents
- Foreword3
- 1 Scope5
- 2 Normative references5
- 3 Operating characteristics6
- 4 Models6
- 5 Specifications7
- 6 Technical requirements7
- 6.1 General principle7
- 6.2 Conductor7
- 6.3 Insulation7
- 6.4 Insulated core cabling7
- 6.5 Sheath7
- 6.6 Appearance dimension8
- 7 Inspection11
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
JB/T 8723.2-2012
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
JB/T 8723.2-2012
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 mm
2
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.
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
__________ END __________ […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Similar standards
Editions of JB/T 8734.2
| Edition | Title | Revision | Status |
|---|---|---|---|
| JB/T 8734.2-2012 | 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 | current edition | Current |
| 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 | previous edition | Superseded |
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Related Standards
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
JB/T 8734.1-1998 — Polyvinyl chloride insulated cables, wires and cords of rated voltages up to and including 450/750 V - Part 1: General requirements
JB/T 8734.1-2016 — Polyvinyl chloride insulated cables and wires and cords of rated voltages up to and including 450/750V - Part 1: General requirements
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