Fire-resistant cables are designed to remain functional even when exposed to fire, providing a critical advantage in emergency situations. Unlike regular cables that may melt or burn quickly, these cables can continue to operate for a certain period under fire conditions, ensuring the continuity of essential systems such as control, monitoring, alarm, and guidance circuits. This makes them an essential component in modern buildings, especially in urban and industrial environments where safety is a top priority.
Currently, fire-resistant cables are widely used in critical applications such as fire-fighting equipment, fire alarms, ventilation systems, smoke extraction units, emergency lighting, power outlets, and elevators. Their ability to maintain electrical supply during fires plays a crucial role in minimizing damage and facilitating safe evacuation.
When installing fire-resistant cables, workers must pay close attention to several key factors. First, in areas with high cable density—such as tunnels, interlayers, or locations near flammable materials like oil pipes and storage depots—it is necessary to use Class A fire-resistant cables. In less hazardous environments or where fewer cables are installed, Class B cables may be sufficient.
Second, since fire-resistant cables are often used for emergency power supply, they must function properly during a fire. High temperatures can significantly affect performance, so for long-distance power lines with strict voltage drop limitations, it's recommended to increase the cross-sectional area of the cable by at least one size to ensure reliable operation and reduce energy loss.
Third, it’s important to note that fire-resistant cables are not the same as high-temperature resistant cables. While both are heat-resistant, their functions and performance characteristics differ, and using the wrong type could compromise safety.
Finally, to minimize the risk of failure during a fire, the number of cable joints should be kept to a minimum during installation. If branching is necessary, all joints must be properly protected against fire to ensure the entire system remains operational when it matters most.
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Changzhou Kingsun New Energy Technology Co., Ltd. , https://www.aioconn.com