The laying method of fire alarm cables is indeed closely related to its installation environment and system design, and is not limited to underground laying.
When the power supply lines and transmission lines of the automatic fire alarm system need to be installed outdoors, underground laying is a common and recommended practice. This is because underground laying can not only improve the durability of the cable, but also effectively prevent interference and damage from external factors, such as weather changes, man-made damage, etc. In addition, underground laying also helps protect the cable from direct physical damage, further ensuring its stability and reliability.
However, in indoor environments, the laying methods of fire alarm cables are more diverse. According to actual needs and system design, different protection methods can be used for laying, such as metal pipes, flexible (metal) electrical conduits, rigid plastic pipes above B1 level or closed wire troughs. These protection methods are designed to ensure the safety and stability of cables during transmission while reducing the risk of fire. Specifically, fire-resistant copper core wires and cables should be used for power supply lines and fire linkage control lines to ensure continuous power supply and control of related equipment in the event of a fire. Transmission lines such as alarm buses, fire emergency broadcasts, and fire-fighting telephones should use flame-retardant or flame-retardant fire-resistant wires and cables to further reduce fire risks.
In short, the laying method of fire alarm cables should be flexibly selected according to its installation environment and system design to ensure its safety and stability. In outdoor environments, buried laying is a common practice; in indoor environments, appropriate laying methods and protection measures should be selected based on actual needs and regulations.