Hidden dangers are numerous fires caused by cable failures every year. Therefore, in the process of laying and using wires and cables, it is necessary to properly separate the circuits where cables may spread on fire and lead to serious accidents, and the dense places of cables vulnerable to external influences and fires. Fire prevention measures shall be formulated according to the importance of cable lines, fire probability and its characteristics, economic rationality and other factors.

At the beginning of the wire and cable line design, it is necessary to select the wire and cable with fire protection characteristics according to the scene, and the fire protection measures adopted need to ensure that the delayed combustion can be prevented. At the same time, do a good job in preventing the addition of automatic alarm and special fire fighting devices. Fire barrier separation shall be set at the following positions, such as the opening parts where the cable leads to the electrical cabinet, panel or control panel and platform in the cable structure, the holes where the cable penetrates the partition wall and floor, the important parts in the cable tunnel or the cable trench of the important circuit, and the fire barrier layer shall be set at intervals of about 7m in the shaft.

However, the setting of fire blocking and blocking shall meet the following requirements. For the setting of fire blocking and blocking, fire blocking interlayer, fire blocking materials, fillers or fire blocking bags, fire-resistant partitions, etc. can be used. At the floor shaft hole, it should be able to bear the load of inspectors. The composition of the fire-resistant wall should be made of soft materials such as fire-resistant bags and mineral wool blocks, or fire-resistant blocking materials, fire-resistant partitions, etc., which are convenient for adding or replacing cables without damaging other cables, and are stable under the action of water immersion or rodents. In addition to the main control room, factory wall or long-distance cable tunnel, the fire barrier wall separated by ventilation section shall be set up in addition to the fire door. In other cases, fire door may not be set up when there are measures to prevent blow-. For the anti-blow-by way, fire-retardant paint, tape, or fire-stop board can be applied to all cables in the section of not less than lm on both sides of the fire-stop wall.

Under special circumstances, the fire resistance setting can refer to the following principles:

1. Close to the cable trench of oil-bearing equipment such as high-voltage current and voltage transformer, the trench cover plate of this section should be sealed.

2. In dense cable places or closed channels with high safety requirements, monitoring alarm, temperature measurement and fixed automatic fire extinguishing devices should be equipped.

3. Two or more incoming cables of the substation shall be respectively arranged in channels independent of each other or separated by fire.

4. Outgoing cable of substation should be distributed. The number of cable channels should correspond to the number of main transformers.

5. The cables in the cable interlayer shall be straightened out and fixed on the cable support one by one. All cables shall be arranged in the order of outlet positions. The cables shall be kept at a certain distance from each other, and shall not overlap and cross as little as possible. If cross is required, the intersections shall be separated by fire barriers.

The above is in order to prevent the cable from catching fire due to fault, which can reduce the spread of fire and reduce casualties and property losses. We must take it seriously. The fire-resistant and flame-retardant cables produced by Hangzhou Zhongce Cable Co., Ltd. all meet the national standards, and we can buy them with confidence.