Basic knowledge of wire and cable selection

With the improvement of living standards, people's demand for electricity is also increasing, and the use of cables is also increasing. Although the line is small, it is very important. It is an indispensable basic building material in home decoration, and the quality of wire directly affects the circuit safety of home decoration. Today, the editor will share with you some common knowledge about DIY wires and wire selection.

1、 Introduction to Common Knowledge of Electric Wires

When decorating a house, electrical wires are an indispensable building material for shading technology. To choose a suitable and high-quality wire, it is necessary to first understand some common knowledge about wires.

2、 The difference between wires and cables

The wires used for circuit decoration are generally referred to as wires and cables, and there are no strict boundaries for wires and cables. If it is necessary to distinguish, the wire is composed of one or more flexible wires, covered with a lightweight soft sheath; The cable is composed of one or more insulated conductors, which are then covered with a hard outer layer of metal or rubber. The DIY field generally does not require wires, and wires meet the requirements.

3、 Classification of household cables

There are different types of wires, which can be classified according to their purpose. Compared to other power cables, such as B. technical cables, household cables have relatively lower functional requirements for cables. Specifically, the classification of household electrical wires is as follows.

Solid wire: professionally known as BV wire, mainly used for power supply, lighting, sockets, air conditioning, power equipment cables and wires, household appliances, outdoor and telecommunications equipment with AC voltage of 450/750V and below. Hard wire has a certain hardness, making it easier to bend and straighten

Flexible cable: professionally known as BVR cable, suitable for cables and wires of power equipment, household appliances, outdoor and telecommunications equipment with AC voltage of 450/750V and below, such as B Power Distribution Box. Compared to hard wires, the manufacturing of soft wires is complex, and high-frequency circuit soft wires have a larger current capacity than hard wires.

Hard and soft wires (weak wires) are composed of single and multiple copper core wires, generally referring to network wires, wires, and cables with relatively low voltage.

4、 Standard for wiring of conventional household appliances

The square of the wire we often hear refers to the cross-sectional area of the wire. Common cross-sectional areas include 1.5 square, 2.5 square, 4 square, 6 square, and 10 square. The square of a wire is square millimeters, which refers to the size of the cross-sectional area of the wire.