The installation specifications for fire-resistant cables mainly include the following steps and precautions:
1. Pre preparation: Determine the type and specifications of cables to ensure they meet actual needs. At the same time, necessary engineering measurements and designs are carried out to determine the direction and laying method of the cables.
2. Laying: Lay along the predetermined direction according to the design requirements. Ensure that the bending radius of the cable meets the requirements and avoid excessive bending or stretching.
3. Connection: Connect at different sections of the cable. The connection methods generally include welding, crimping, and bolt connection.
4. Fixation: Use a fixed bracket or fixture to secure the cable in the desired position, ensuring that it does not generate unnecessary tension or movement.
5. Insulation treatment: Use insulation materials to insulate the cable to ensure its insulation performance.
6. Testing: After installation, conduct necessary tests to ensure the reliability and performance of the cable connection.

During the installation process, the following precautions should also be taken:
1. Comply with relevant safety operating procedures to ensure the personal safety of installation personnel and the quality of cables.
2. Choose appropriate laying methods and brackets to ensure the stability and safety of the cables.
3. In order to reduce the probability of cable joint failure in fire accidents, the number of joints should be minimized as much as possible, and the normal operation of the line in a fire should be ensured.
When used in cable tunnels, intermediate layers with dense cables, or flammable places such as oil pipes and oil tanks, Class A fire-resistant cables should be given priority. If the number of cables is small, Class B fire-resistant cables can be used.

Please note that these are only general installation specifications, and specific installation requirements may vary depending on cable type, specifications, and installation environment. Therefore, in the actual installation process, it is recommended to refer to the installation guidelines and relevant standards provided by the cable manufacturer to ensure installation quality and safety.