The control cable has the characteristics of moisture-proof, anti-corrosion and damage prevention, and can be laid in the tunnel or cable trench. The power cable is used to transmit and distribute high-power electrical energy in the main trunk line of the power system, and the control cable transfers the electric energy directly from the distribution point of the power system to the power supply connection line of various electrical equipment and appliances. The rated voltage of power cables is generally 0.6/1kV and above, and the control cables are mainly 450/750V. When the power cable and control cable of the same specification are produced, the insulation and sheath thickness of the power cable is thicker than that of the control cable.

(a) The control cable belongs to the electrical equipment cable, and the power cable is two of the five categories of cable.

(2) The standard for control cables is 9330, and the standard for power cables is GB12706.

(3) The color of the insulated wire core of the control cable is generally black with white characters, and the low voltage of the power cable is generally color separation.

(4) The cross section of the control cable is generally not more than 10 square meters, and the power cable is mainly used to transmit power, which is generally a large cross section.

Due to the reasons mentioned above, the specifications of the power cable can generally be large, up to 500 square meters (the range of conventional manufacturers can produce), and then the large cross-section can generally do relatively few manufacturers, and the cross-section of the control cable is generally small, and the larger is generally not more than 10 square meters.

From the number of cable cores, according to the requirements of the power grid, the power cable is generally 5 cores at most, and the control cable transmission control signal is used, the number of cores is more, according to the standard, there are 61 cores, but it can also be produced according to the user's requirements.

1. Fire-resistant cable must be flame retardant?

The answer is no. There are two kinds of fire-resistant cable, one is the model, the fire-resistant characteristics are completely dependent on the mica layer, the external use of polyvinyl chloride or cross-linked polyethylene as insulation, this cable is not necessarily flame retardant; The second is the real refractory cable MI, it is the use of magnesium oxide as insulation material, copper tube as a sheath of the cable, as long as the flame does not exceed the melting point of copper 1083° the cable is safe. This kind of cable is smokeless, non-toxic and flame retardant.

2. What kind of cable is the flexible cable?

Flexible cable (Chinese characteristics) essentially belongs to a model, the process has been improved, in the experimental environment can achieve the characteristics of the second MI cable. However, the real environment is more complex and may not meet the requirements.

The choice of flexible mineral insulated cable is based on the design requirements of the construction project itself, each mineral cable has advantages and disadvantages, and it is because of the shortcomings that it will continue to improve and improve, under normal circumstances the price of flexible mineral fireproof cable is YTTW>BTLY>BBTRZ; From the laying method is also more and more simple, and can pass the fire system acceptance. Therefore, these are the need for third-party professional organizations to do evaluation reports to determine which model to choose

3. Flame-retardant cable model label

One is the old label WDZA,WDZB,WDZC,WDZD four categories, derived from GB/T19666.

The other is the combustion performance of the new cable gauge A,B1,B2, from GB31247.

The two are different evaluation requirements, and the experimental environment and methods are also different. The latter is closer to the actual fire environment requirements.

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