What is the wire thickness specification? How to choose wires?

Water and electricity are often the first step in interior decoration, but wires must be used when installing circuits. There are also wires in the decoration materials purchased by the owner first. What is the thickness specification of the wire? When the owner went to buy wires, he found that there were many kinds of wires on the market, but how to choose them? Next, Bian Xiao will tell you about it.

1. What is the wire thickness specification?

First of all, the thickness of conductor should be clearly specified in the circuit design drawing, and the selection of conductor and fault calculation in power engineering design should be specified.

Secondly, there is a simple method. When installing some new or small simple substations, we will encounter projects that are not designed or planned. At this time, you need to choose your own line. There are several wire specifications in China, including1.52+0008+5000000505. The order of current carrying capacity is 2530394995438+0131431702645.

Second, how to choose wires

1, load power

The cross-sectional areas of copper wire and aluminum wire are the same, but the load power of copper wire is higher than that of aluminum wire. For example, two wires are 2.5 square wires, aluminum wire can carry 2500 watts, and copper wire can carry 3000 watts.

2. Flexibility

Copper wire has good flexibility, bending freely and anti-fatigue effect. The aluminum wire may be accidentally broken when it is bent, and it will be harder.

3. Stability

Aluminum wire is easy to oxidize, and then the resistance will increase, and the load of the wire will naturally decrease, which will easily lead to accidents and insecurity. Copper core is very stable and suitable for selection.

Step 4 look at the packaging

See if there is a certificate on the package. The certificate should have information such as specification, size, rated voltage, date, factory name, length and address. See if there is 3C and production license number of national compulsory product certification; See if there is a quality system certificate; See if the certificate meets the standard.

5, check the wire size

The error of line length shall not exceed 2%, and the difference of line diameter of cross section shall not exceed 0.02%. Many lengths and sections in our market are not up to standard, so we should pay special attention when choosing them.

6. Look at the color of copper

The copper core of a good wire is generally purple in color, with a good crown and soft to the touch. The bad copper core of the wire is purple black, dark black, yellow or white. It is suggested not to choose this inferior product, which is related to our life safety.

7. Look at insulating rubber

Bad wire insulation looks thick. It is made of recycled plastic. If you squeeze it hard, it will appear white and lose powder.

8. Look at the brand

Remember to choose products with good reputation. A trustworthy brand is the most reliable. A good brand will not make false propaganda, but pay attention to quality and service.

What is the wire thickness specification? Different specifications of wires mean different ways and locations of use, so you need to choose carefully when buying wires. How to choose wires? Be sure to choose the wire that suits you. If the wires used are not good enough, many problems will easily occur during use.