To ensure data security, it's crucial to have sufficient time to recover and transfer all data to a safe location before the entire network collapses in the event of a fire, minimizing the possibility of data loss. Therefore, cable standards include a category of fire-resistant standards called "line integrity" standards. Its goal is for cables to maintain line integrity in a fire, allowing power and information to continue transmitting normally. Cables meeting these integrity requirements are thus called fire-resistant cables.
Currently, there are two common levels of fire-resistant cable performance:
Chinese Standard: Able to continue operating for 90 minutes at 750℃ (E90).
German Standard: Able to continue operating for 180 minutes at 800-850℃ (FE180).
Although the latest Chinese data center standard requires all cables to use CMP-grade integrated cabling, meaning it can still transmit data normally without damage at 500℃, allowing time for emergency data backup, this does not meet the national standard's requirements for fire-resistant cables and therefore cannot be considered fire-resistant cables.