Low Smoke Fire Resistant Cable

Fire-resistant cables are mainly used in power supply circuits from emergency power supplies to user fire protection equipment, fire alarm equipment, ventilation and smoke exhaust equipment, navigation lights, emergency power sockets, emergency elevators, etc.   Workers need to pay attention to the following issues when installing fire-resistant cables When fire-resistant cables are used in cable fermentation tunnels, cable interlayers with dense cables, or in flammable places such as near oil depots, Class A fire-resistant cables should be selected first. Except for these situations and when the number of cable configurations is small, Class B fire-resistant cables should be selected.   Fire-resistant cables are mostly used as power supply circuits for emergency power supplies and are required to function normally in case of fire. Since the ambient temperature rises sharply during a fire, in order to ensure the transmission capacity of the line and reduce the voltage drop, for circuits with long power supply lines that strictly limit the allowable voltage drop, the cross-section of the fire-resistant cable should be enlarged by at least one level.   Fire-resistant cables cannot be used as high-temperature resistant cables.   In order to reduce the probability of cable joint failure in a fire accident, the number of joints should be minimized during installation to ensure that the line can work normally in a fire. If branch wiring is required, the joints should be fireproofed.