JB/T 8734.3-2012Polyvinyl chloride insulated cables and wires and cords of rated voltages up to and including 450/750V - Part 3: Cords and cables for connecting (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3部分：连接用软电线和软电缆
This is a limited preview
Buy now to download the full PDF (15 pages)
Need quotation for your management?
Get a formal quotation for JB/T 8734.3-2012 in 30 minutes.
Issued by
MIIT
Level / Type
Industry · Recommended
Issue date
May 24, 2012
Implementation date
November 1, 2012
Scope
JB/T 8734.3-2012 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3部分：连接用软电线和软电缆.
JB/T 8734.3-2012 is the Chinese standard "Polyvinyl chloride insulated cables and wires and cords of rated voltages up to and including 450/750V - Part 3: Cords and cables for connecting".
Its scope clause reads: This Part of JB/T 8734 specifies use characteristics, models, specifications, technical requirements and inspection of cords and cables for connecting.
This Part is only applicable to PVC insulated copper cords and cables for connecting of electrical appliance, instruments and dynamic lighting of which the AC rated voltage U o /U is 300/500 V and less. Its clauses include technical requirements.
Found what you need?
Document preview — JB/T 8734.3-2012
National Standard of the People's Republic of China
- Replacing
- JB/T 8734.3-1998
Issued by: Ministry of Industry and Information Technology of the People's Republic of China
Contents
- Foreword3
- 1 Scope5
- 2 Normative references5
- 3 Use characteristics6
- 4 Models6
- 5 Specifications6
- 6 Technical requirements7
- 6.1 General7
- 6.2 Conductor7
- 6.3 Insulation7
- 6.4 Insulated core twisting11
- 6.5 Sheathing11
- 6.6 Outer diameter11
- 7 Inspection12
1 Scope
This Part of JB/T 8734 specifies use characteristics, models, specifications, technical requirements and inspection of cords and cables for connecting.
This Part is only applicable to PVC insulated copper cords and cables for connecting of electrical appliance, instruments and dynamic lighting of which the AC rated voltage U o /U is 300/500 V and less.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
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
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 […]
6 Technical requirements
6.1 General
In addition to the technical requirements specified in this Part, the cords and cables shall also comply with the provisions of JB/T 8734.1-2012.
6.2 Conductor
The number of cores and structure of conductor shall comply with the provisions of Table 3 and Table 5.
RVB cord conductor shall use the 6 th soft copper conductor specified in GB/T 3956-2008.
RVV cable conductor shall use the 5 th soft copper conductor specified in GB/T 3956-2008. The maximum conductor resistance value of copper core conductor of which the nominal cross-sectional area is 2.0 mm
2 at 20°C is 9.79 ohm/km. The maximum conductor resistance value of tinned copper core conductor of which the nominal cross-sectional area is 2.0 mm
2 at 20°C is 10.2 ohm/km.
6.3 Insulation
The insulation of extrusion on conductor should be PVC blend of which the code is PVC/D.
The insulation thickness shall comply with the provisions in Table 3 ~ Table 5.
The insulation resistance shall not be less than the predetermined values in
Table 3 ~ Table 5.
6.4 Insulated core twisting
6.4.1
Insulated cores of RVS cords shall be twisted together. RVS cable
should be twisted to the right and the pitch shall not exceed 8 times the average outer diameter upper limit.
6.4.2
RVB cord conductor shall be placed parallel with extruded insulation.
There should be a groove at the insulation sides between conductors, so as to isolate the insulated cores.
6.4.3
For RVV cables, insulated cores with or without same nominal cross- sectional area can be twisted together.
6.5 Sheathing
The sheathing extruded on insulation or stranding core should be PVC blend of which the code is PVC/ST5.
The sheathing thickness shall comply with the provisions in Table 5.
The sheathing is allowed to fill the gap between insulated cores so as to form the filling. But the sheathing does not stick to the insulated core.
6.6 Outer diameter
The average outer diameter of cord or cable shall comply with the provisions in
Table 3 ~ Table 5.
The number of cores × nominal cross-sectional area mm
2
Predetermined value of insulation thickness mm
Predetermined value of sheathing thickness mm
Average shape size mm
Lower limit Upper limit
The minimum resistance value of conductor at 70°C
NOTE: Cable structure of other number of cores or more is allowed to use.
......
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 8734.3
| Edition | Title | Revision | Status |
|---|---|---|---|
| JB/T 8734.3-2012 | Polyvinyl chloride insulated cables and wires and cords of rated voltages up to and including 450/750V - Part 3: Cords and cables for connecting | current edition | Current |
| JB/T 8734.3-1998 | Polyvinyl chloride insulated cables and wires and cords of rated voltages up to and including 450/750V - Part 3: Cords and cables for connecting | previous edition | Superseded |
This page sells the current edition, JB/T 8734.3-2012. Earlier editions are listed for reference only.
How to Download JB/T 8734.3-2012
- 1
Add to cart
Click "Download PDF" on this page and choose "Buy this standard". You can add more standards before checkout.
- 2
Checkout
Enter your email and billing details. Payment is processed securely by Stripe (cards or bank transfer). Prefer bank details? Request a quotation (min. order $300).
- 3
Instant delivery (0–9 sec)
Delivery is automatic: within seconds of payment you'll receive an email with a secure download link. The link stays valid for 72 hours.
- 4
Invoice included
A tax invoice is attached to the confirmation email. Need a custom invoice? Contact us.
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
Secure payment via Stripe
Payments accepted
JB/T 8734.3-2012
$90.00