GB/T 3953-2024 in English

《GB/T 3953-2024电工圆铜线》由TC422（全国裸电线标准化技术委员会）归口，主管部门为中国电器工业协会。

Round copper wire for electrical purposes

1 Scope

This document specifies the model, structure, specification, representation, technical requirements and delivery requirements, as well as packaging, storage, transport and marking of round copper wires for electrical purposes, describes the test methods, and establishes the acceptance rules.

This document is applicable to the manufacture, testing and application of round copper wires for cables and cords, motors and other electrical and electronic devices.

2 Normative references

The following documents contain requirements which, through reference in this text, constitute provisions 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 3048.2-2007 Test methods for electrical properties of electric cables and wires - Part 2: Test of electrical resistivity of metallic materials
GB/T 3952 Copper drawing stock for electrical purpose
GB/T 4909.1-2009 Test methods for bare wires - Part 1: General
GB/T 4909.2-2009 Test methods for bare wires - Part 2: Measurement of dimensions
GB/T 4909.3-2009 Test methods for bare wires - Part 3: Tensile test
GB/T 8170 Rules of rounding off for numerical values & expression and judgment of limiting values

3 Terms and definitions

For the purposes of this document, the terms and definitions given in GB/T 3048.2-2007, GB/T 4909.1-2009, GB/T 4909.2-2009, GB/T 4909.3-2009 and the following apply.

3.1
lot
round copper wires of the same condition and specification produced by the same manufacturer under the same production conditions

Note: One lot usually includes part or all of the order quantity.

3.2
single wire
single metal wire having a specified circular section

3.3
multiline wire
metal wire composed of multiple single wires in the same state and specification that are parallel to each other.

4 Models, structures and specifications as well as representation method

4.1 Models
The model of a round copper wire is composed of material code, state code and performance code. The material code “T” means that the material is copper, the state code “R” stands for soft state and “Y” stands for hard state, and the performance code is classified by numbers. See Table 1 for details.

Contents
Foreword III
1 Scope
2 Normative references
3 Terms and definitions
4 Models, structures and specifications as well as representation method
4.1 Models
4.2 Structures
4.3 Specifications
4.4 Representation method
5 Technical requirements
5.1 Material
5.2 Structures
5.3 Surface quality
5.4 Dimension and deviation
5.5 Tensile strength and elongation
5.6 Volume resistivity
5.7 Joint
6 Test methods
6.1 Calculation parameters
6.2 Structure and surface quality
6.3 Dimension and deviation
6.4 Tensile strength and elongation
6.5 Volume resistivity
7 Delivery requirements
8 Acceptance rules
8.1 General
8.2 Inspection items
8.3 Sampling rules
9 Packaging, storage, transport and marking
9.1 Packaging, storage and transport
9.2 Marking
Bibliography
Table 1 Model and name of round copper wires
Table 2 Size range of round copper wires
Table 3 Nominal diameter and allowable deviation of round copper wires
Table 4 Tensile strength and elongation of round copper wires
Table 5 Volume resistivity of round copper wires at 20°C
Table 6 Inspection items