First, the fire emergency lighting circuit
Generally, flame-retardant wires are concealed in incombustible structures through metal pipes, and the thickness of protective layer is ≥ 30 mm In decoration engineering, when emergency lighting lines can only be exposed in the ceiling, heat-resistant or fire-resistant wires should be used, and fire-resistant and heat-resistant wiring measures should be considered.
Second, the fire elevator wiring
Generally, fire elevators are distributed to the elevator machine room on the top floor by laying two special lines in the substation on the bottom floor of high-rise buildings. Due to the long line and complicated routing, the fire elevator distribution line should use fire-resistant cables; When there are special requirements for reliability, one of the two distribution lines can choose mineral insulated cable.
Third, the wiring of fire shutter doors.
The power supply of fire shutter doors is usually led to the floor distribution box with dual power supply switching, and the power supply to its control box is radial or annular through the special distribution box for fire shutter doors. When the horizontal distribution line of fire shutter door is long, it is advisable to use fire-resistant cable, and the fire-resistant cable bridge is exposed in the ceiling.
Four, smoke control device wiring
Fire-resistant cross-linked low-voltage cables or mineral insulated cables are used for the distribution lines of smoke control and extraction devices when exposed, and general fire-resistant cables can be used when concealed. Fire-resistant cables are used for linkage lines and control lines of smoke control devices. The lines of smoke prevention and exhaust devices should be as short as possible to avoid crossing different fire zones.
Five, fire hydrant pump, spray pump wiring, etc.
The distribution lines of water pumps and motors are often buried in incombustible structures through metal pipes, or fire-resistant cables with fire-resistant cable trays, or mineral insulated cables. The power supply of the pump room is generally provided directly by the substation of high-rise buildings; When the substation is adjacent to the water pump house and belongs to the same fire zone.
? When fire-resistant cables or buses are used along the fire-resistant cable bridge; When the substation is far away from the pump room and crosses different fire zones, mineral insulated cables can be used.