Wire and Cable Fire Protection Design Regulations (1) When cables are laid in vertical wells, cable lifts should be used.
(2) When wires and cables are laid on ceilings or floors, metal pipes, metal trunking, or metal trays should be used. When the wire and cable used have the capability of preventing damage to mice or small animals, and the floor is non-burning, they can be laid directly under the floor. When laid, they should be arranged neatly to facilitate maintenance.
(3) When an electric wire is applied in an open position, a metal pipe or a metal trunking should be used in a special grade or class I site, and a metal pipe or a metal trunking should be used in the secondary class. PVC pipe will release a large amount of toxic gas and smoke in the fire. It is not suitable to use PVC pipe for the surface coating. UPVC is flame-retardant and produces less toxic gas, so it can be used.
(4) When the wire is applied darkly, metal pipes or flame-retardant rigid plastic pipes should be used, and they should be laid in the non-burning body structure. When the fire equipment line is concealed, the thickness of the protective layer should not be less than 30mm.
(5) Flame retardant wire and cable, flame retardant and fire resistant wire and cable can be laid in the same cable tray. Because the fire-resistant cable itself has the energizing characteristics that can be maintained in the flame for a period of time, it can be laid in the same bridge.
(6) Two-way power lines leading to fire fighting equipment can be laid in the same cable tray.
(7) Cables laid in the same cable tray are easy to adopt isolation measures when their non-metallic material capacity is greater than 14L/m. The non-metallic content of the cable is the most basic basis for selecting the level of the flame-retardant cable. According to the nature of the building, and the degree of damage to life and property and the degree of difficulty in fighting after the fire has occurred, the cable flame retardant grades for different grades of buildings may refer to the “Code for Fire Protection Design of Civil Building Wire and Cable†promulgated by Shanghai. The provisions of the cable flame retardant level.
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