The Secret to Fire-Resistant Cable Longevity
Fire-resistant cables typically ensure safe operation for a duration of 90 minutes to 3 hours-think of this as the duration of their "superpower." Specially designed mica tape wraps the conductor; when exposed to high heat, it undergoes vitrification to form a protective layer. Under normal conditions, they have a service life of 25–30 years, but their true value lies in their unique ability to maintain circuit continuity during a fire.
Survival Rules in High Heat
- Temperature Tolerance: Remains functional for over 90 minutes at 750°C
- Structural Advantages: Multi-layer protective design slows heat conduction
- Smart Protection: Automatically forms a ceramic-like protective layer during combustion
- Emergency Support: Buys critical time for firefighting and rescue operations
Three Tips for Extending Service Life
- Want to keep your fire-resistant cables in top condition for longer? Pay attention to these details:
- Avoid prolonged overloading; keep the current within 80% of the rated value
- Regularly inspect the insulation layer and replace it promptly if signs of aging appear
- Use protective conduit in damp environments
- Minimize sharp bends during installation to prevent mechanical damage