Gb cable is divided into copper core wire and aluminum money according to raw materials; Cable lines are divided into wire and cable, communication cable, frequency conversion cable according to the main use; According to the insulating layer material, it is divided into bare transmission wire, silk-covered wire, plastic insulated wire, vulcanized rubber insulated wire, etc.

Cable type specification selection

Generally, power lines with only cable sheaths are called "cable lines", and those with not only cable sheaths but also protective cable sheaths are called "cable lines".

Common cable and wire model specifications are: BV, BLV, BVR, RV, RVV, RVVP, RVS these.

Home decoration wiring selection BV or BVR can be, BV line is harder, but its load working capacity, weather resistance than BVR much better. Compared with BV line, BVR is soft, strong overcurrent working ability, more convenient engineering construction, and the price needs to be more expensive.

Because the BV wire is a single wire and the same section of BVR, its copper wire is thick, and it is not easy to burn out when the temperature is high for a long time; The copper wire of the BVR wire is relatively thin, and it is very easy to burn out one or two of them when the temperature is high. As long as one or two copper wires in the cable are burned out, the burned section is reduced, the resistor is higher, and the cable is more easily damaged.

In the specific application of the GB cable, because the BVR cable is soft, the connector is very easy to loose after a long time; The BV line is relatively many, so in the home decoration in order to better avoid the connection head loose need to use the "hanging tin" processing process.

In the power distribution equipment of the processing plant, VV cable and YJV cable are generally used more, in which VV cable is only used in the normal temperature natural environment, and YJV can be used in the production workshop with higher temperature, and the high temperature temperature can reach 90 degrees.

Frequency conversion cable select RVV cable, if there is a magnetic field, electrostatic field around it must be used with a shielded layer of cable RVVP. Fire protection facilities generally choose five types of twisted pair RVS, five types of twisted pair we also call it "soft wire".

Cable section selection

The selection of cable section should be based on the current flow size, laying method (hidden installation, installation, threading pipe, etc.), working temperature, route loss, impact toughness and other factors to select.

According to the size of the current flow to select the cable section can be estimated according to the inquiry table, but also according to the mouth.

At present, most of the copper core wire on the market is selected, 1.5 square meters of copper core wire can pass 20A, 2.5 square meters of copper core wire can pass 28A, 4 square meters of copper core wire can pass 35A, 6 square meters of copper core wire can pass 50A, 10 square meters of copper core wire can pass 65A... It is the condition of dark wire installation.

If it is a high temperature natural environment, it must be calculated basically by 10% above; If it is two or three pipes, it must be calculated basically according to 20% and 70% of the above.

Route loss refers to the current flow according to the transmission line, which will cause damage to the operating voltage. For example, the working voltage of 400V is pulled from the primary distribution box to the secondary distribution box in the production workshop, and the final working voltage is only 380V, which is caused by the national standard cable resistor and a part of the working voltage is lost.

Qingdao Tianxing Cable Co., Ltd. focuses on the production of customized wire and cable manufacturers, main: fire wire and cable, power cable, control cable and other products, exported to more than 40 countries and regions around the world, the annual production capacity of 1 billion yuan. 6000 square meters of storage, standing hundreds of millions of inventory, order demand for rapid distribution and delivery, large prices more favorable. Hotline: 16678668098