Cable laying fire prevention knowledge

Cable laying a fire prevention knowledge, flame retardant wire and cable fire retardant wire and cable fire prevention mechanism: under the effect of heat of combustion reaction, the thermal decomposition of flame retardants in coacervate phase absorption of heat, causes the condensed phase temperature rise slow, delay the decomposition velocity of material, at the same time, the release of the chain reaction of free radicals blockers, interrupt the ramification of flame, a chain reaction, reducing the speed of gas instead should, blocking the temperatures in the condensed phase, fire prevention function; The classification of the flame retardant wire and cable and choose: flame retardant cable mainly includes ordinary flame retardant wire and cable, low smoke zero halogen flame retardant cable, low smoke low halogen flame retardant cable, fire-resistant cable, manufacturing technology, the performance characteristics of these products is different, have different application scope. Second, the scientific design and installation block: fire-proof sealing is to use fireproof plugging material to blockage of cable through the gap, prevent cable fire burning. On the joint of cable trench and electrical plate, box, cabinet, wall, floor holes are needed such as flame retardant sealing. Cable fire door to shut down for a long time, cable fire prevention board and in cable trench cover plate gap should be closed, cable laying dense using soft plugging material seal sealed; Space: fire partition long cable tunnels, cable channel can be divided into community, will be on fire interval narrowing, can use refractory plate, aluminum silicate fiber felt, fireproof plugging material, fireproof coatings, etc. Fire partition wall made of mineral wool, used in the tunnel with the fire door; Coating: coating can avoid the cable fire by burning fire retardant coating, fire retardant belt construction is convenient, fall off not easily, strong adaptability, cheaper prices. In the cable to the terminal part of the cabinet put oneself in another's position, 2 ~ 3 meters on both sides of fire partition area will all cable fire retardant coating brushing twice fire retardant belt or bag. Three, set up fire prevention facilities set fire alarm system: according to the actual situation, choose the appropriate alarm detector and alarm system suited to the characteristics of the cable layer, the current in the cable trench, well pipe is widely used is linear, Or rope type) Thermal detector; High pressure water spray fire extinguishing: in the corridor, cable populated areas appropriate way of using high pressure water spray fire extinguishing, to make the water spray fire extinguishing work, in a timely and effective manner to configure high sensitivity of monitoring and control system; To strengthen the cable layer ( Well) Ventilation: using the natural ventilation condition, as far as possible in the cable layer by exterior part vents, at the same time also should establish uninterrupted power supply of the mechanical smoke extraction system, so at the beginning of the fire automatic alarm linkage to open the exhaust fan. Four keep good running state, the standard daily management, to prevent the cable due to the internal insulation defect, aging, be affected with damp be affected with damp, damage such as cable fault cause short circuit, open circuit arc ignition cable, timely find defective insulation cable, and the exit; Keep a good running environment: it is forbidden to thermal system of exhaust gas, waste water flows into the cable trench and cable tunnel; To strengthen the monitoring and management of cable head: cable head is influenced by various factors is the weak link of cable insulation, to put in cable ducts, cable tunnels, cable tray, cable interlayer of power cable terminals, the middle joint must be cataloged, strengthen supervision, avoid running cable hot hair is on fire. Note: this article is reproduced network resources, if there is any infringement of copyright issues, please contact the administrator to delete!