What is the wire diameter of the terminal wire? What are the specifications of the wire diameter of the terminal wire?

Terminal wire (Terminal wire) is a wire often used in circuit connection, used to connect the power, signal or control line of electrical equipment. Its wire diameter refers to its cross-sectional diameter, commonly used in millimeters (mm) or American Unit Gauge (AWG). The wire diameter of the terminal wire is not only related to its conductivity, but also to its maximum current carrying capacity and the strength of the wire. In the electronic components and equipment manufacturing, installation, maintenance process, the terminal line wire diameter for the correct selection and application is very important, so this article will focus on the terminal line wire diameter and specifications.
A, the wire diameter of the terminal line
The wire diameter of the terminal wire is usually expressed in numbers and letters, such as 14AWG, 12mm, etc.. The number represents the size of the wire diameter, the larger it is, the thicker the wire diameter, the larger the current can be carried; letters indicate the diameter of the specification unit, different specification units represent the size of the wire diameter is different.
Second, commonly used terminal wire specifications
Millimeter specifications
In China, the wire diameter of the terminal wire commonly used millimeter (mm), the common specifications are 0.5mm, 0.75mm, 1.0mm, 1.5mm, 2.5mm, 4.0mm, etc.. Among them, 0.5mm and 0.75mm wire diameter is generally used for small electronic equipment and circuit connections, such as electronic components, electronic scales, household appliances, etc.; 1.0mm, 1.5mm, 2.5mm, 4.0mm and other thick wire diameter is commonly used in large electrical equipment and circuit connections, such as motors, generators, power transmission lines, etc.
U.S. Specifications (AWG)
Internationally, the wire diameter specification of terminal wire is usually expressed using the American Wire Gauge (AWG). American Wire Gauge is expressed in decreasing numbers, the larger the number, the smaller the wire diameter. Commonly used AWG specifications are 20AWG, 18AWG, 16AWG, 14AWG, 12AWG, 10AWG, etc. Among them, 20AWG and 18AWG wire diameter is small, suitable for electronic equipment in small lines and power connections; 14AWG, 12AWG, 10AWG and other thicker wire diameter is suitable for large power equipment and transmission lines, etc..
Third, how to choose the right terminal wire specifications?
The correct selection of the appropriate terminal wire specifications for circuit connections and the normal operation of electrical equipment is essential. In general, the selection of terminal wire specifications should consider the following factors:
1. Circuit load current
The wire diameter of the terminal wire should be large enough to carry the required current. In general, if the circuit load current is large, it is necessary to choose a thicker wire diameter terminal wire specifications.
2. Line length
Circuit in the electrical
When the circuit length is long, the line resistance will increase, resulting in a voltage drop. In order to avoid excessive voltage drops that cause the circuit to work improperly, a thicker wire size should be selected for the terminal line.
3. Ambient temperature
The conductivity of the terminal line is greatly affected by temperature, when the ambient temperature is high, the resistance of the terminal line will increase, resulting in overheating when the current passes through the terminal line. Therefore, when using the terminal line in a high-temperature environment, you should choose a thicker wire diameter specifications.
4. Wire strength
Terminal wire is subject to forces such as pulling, bending and squeezing during installation, use and maintenance. In order to ensure the strength and durability of the wire, you should choose the appropriate wire diameter of the terminal wire specifications.
In summary, the selection of the appropriate terminal wire specifications need to consider the above factors, reasonable selection can ensure the normal operation of the circuit, but also to extend the service life of the equipment.
Terminal wire is an essential wire in the circuit connection, the size of its wire diameter and the choice of specifications is very important. The correct selection and application can effectively ensure the normal operation and safe use of electrical equipment, reduce the maintenance costs and failure rate of electrical equipment.

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