GB/T 3956-2008 in English

《GB/T 3956-2008电缆的导体》由TC213（全国电线电缆标准化技术委员会）归口，主管部门为中国电器工业协会。
本标准规定了标称截面积0.5mm2~2500mm2的电力电缆和软线用的导体。对单线的数量和尺寸以及电阻值的要求也包括在内。这些导体包括固定敷设的电缆中的实心和绞合的铜、铝和铝合金导体，以及柔软铜导体。
本标准不适用于通信用途的导体。
本标准适用于特定设计的电缆，只要该种类型电缆在本标准中作了规定。

1 Scope

This standard specifies the nominal cross-sectional areas, in the range 0.5mm2 to 2500mm2, for conductors in electric power cables and cords of a wide range of types. Requirements for numbers and sizes of wires and resistance values are also included. These conductors include solid and stranded copper, aluminium and aluminium alloy conductors in cables for fixed installations and flexible copper conductors.
This standard does not apply to conductors for telecommunication purposes.
The applicability of this standard to a particular type of cable is as specified in this standard for the type of cable.
Unless indicated to the contrary in a particular clause, this standard relates to the conductors in the finished cable and not to the conductor as made or supplied for inclusion into a cable.
Informative annexes are included giving supplementary information covering temperature correction factors for resistance measurement (Annex B) and dimensional limits of circular conductors (Annex C).

2 Terms and Definitions

For the purpose of this standard, the following terms and definitions apply.
2.1
Metal-coated
Coated with a thin layer of suitable metal, such as tin or tin alloy.
2.2
Nominal cross-sectional area
Value that identifies a particular size of conductor but is not subject to direct measurement.
Note: Each particular size of conductor in this standard is required to meet a maximum resistance value.

Foreword I
1 Scope
2 Terms and Definitions
3 Classification
4 Materials
5 Solid Conductors and Stranded Conductors
6 Flexible Conductors (Classes 5 and 6)
7 Check of Compliance with Clauses 5 and 6
Annex A (Normative) Measurement of Resistance
Annex B (Informative) Exact Formulae for the Temperature Correction Factors
Annex C (Informative) Guidance on the Dimensional Limits of Circular Conductors