Fire resistant cables, as the name suggests, are cabling designed to survive exposure to flames according to a series of standard parameters, as defined by regulations both local and international. These parameters, expressed in performance as required by law, are critical to passing safety inspections in companies, manufacturing sites, and other environments exposed to fire. In this article, we will try to understand what fire resistant cables are, what are the main characteristics that make them fireproof, and, finally, what are their main uses.
Fire resistant cables: what are they?
By definition, a fire-resistant cable is characterized by the ability to maintain its functionality even during a fire or in case of sudden exposure to flames or very high temperatures. The type of resistance, however, is not the same for all fire-resistant cables since it varies according to the different international standards. In fact, in addition to these standards, one must consider the most important safety feature, i.e., the cable’s survival time during a fire.
This resistance performance is measured by time intervals, i.e., minute intervals within which the cable can resist flames. Based on the type of resistance, the cable will receive an assigned value that will determine its grade and, therefore, its reliability and robustness in case of danger.
Cable resistance values
The intervals are as follows:
- 15 minutes
- 30 minutes
- 60 minutes
- 90 minutes
- 120 minutes
These resistance values have been standardized at the European and international levels with uniform performance scales, such as IEC and CENELEC. Therefore, when a company is about to purchase fire-resistant cables from a specialized but foreign-based company, it will necessarily have to check for equivalent certifications.
Differences between international standards
While the use of fire-resistant cables is subject to strict regulatory discipline in each country, the exact standards vary from area to area. Thus, even if a cable is considered compliant in Europe, it may not be so in America.
To compare different international standards, it is necessary to refer to a range of certifications that are generally divided by continent with some leeway. For example, America requires CENELEC certifications, whereas in Europe the equivalent certification is issued by the IEC. In China, on the other hand, the main certification to refer to is the CCC. All these acronyms involve several small variations in terms of quality and safety standards, but recently international institutions have initiated plans to standardize them to provide easy reading for those in the industry. However, the time intervals listed above are the same in every part of the world. Read more about 8 Electrical Safety Checks Every Small Business Owner Needs To Stay Safe.
What are fire-resistant cables for?
These cables, as can be easily guessed, are intended for use at facilities of various kinds to meet a specific need: to ensure the operation of the infrastructure even in the event of a fire and for as long as possible.
This means that fire resistant cables are mostly intended for power supply and, generally, for use at civil engineering facilities. These cables are intended to limit the spread of flame and smoke and as seen earlier, must meet specific local and international safety standards.
They are installed where the law requires high fire safety standards, i.e., in emergency lighting systems, fire detection alarms, automatic door openers, ventilation, and air conditioning systems, emergency telephone systems, and so on.
Basically, they are used in all those places where the presence of fire can be dealt with by prompt assistance solutions, and electrical and communication networks need to stay functional for as long as possible.
Fire Resistant vs Flame Retardant: The Difference
Fire resistant and flame retardant sound alike, but they are not the same. A fire resistant cable keeps working during a fire. It carries power to emergency systems such as fire alarms, emergency lights, and lifts while the fire burns. A flame retardant cable resists catching fire and slows the spread of flames, but it may stop working in a fire. For life safety systems, fire resistant cables are the right choice.
Common Types of Fire Resistant Cables
| Type | What It Is |
|---|---|
| Mineral insulated (MI) | Copper conductors inside a copper sheath with mineral insulation; very high fire resistance |
| Mica tape | Conductors wrapped in mica tape, which resists high heat |
| Silicone rubber | Silicone insulation that keeps working at high temperatures |
Where Fire Resistant Cables Are Used
Fire resistant cables are used where circuits must keep working in a fire. Common places include hospitals, schools, hotels, airports, high-rise buildings, tunnels, and factories. They power fire alarm systems, emergency lighting, smoke extraction fans, lifts, and water pumps. Building codes often require them in escape routes and public buildings.
Key Standards to Know
Different countries use different standards. IEC 60331 tests whether a cable keeps working during a fire. BS 6387 is a British standard for fire resistant cables. EN 50200 is a European standard for emergency circuits. Always check which standard your local building code requires, and buy cables with the right certification.
Installation Tips
Install fire resistant cables away from flammable materials where possible. Use fire rated fixings and supports. Do not bend the cable tighter than the maker’s minimum bend radius. Keep joints and terminations in fire rated enclosures. Label the cables clearly so future workers know they are part of a life safety system. Only qualified electricians should install them.
Frequently Asked Questions
What is the difference between fire resistant and flame retardant cables?
A fire resistant cable keeps working during a fire. A flame retardant cable resists catching fire, but it may stop working in a fire.
Where are fire resistant cables required?
They are often required in hospitals, schools, hotels, airports, high-rise buildings, and tunnels, where emergency systems must keep working in a fire.
What standards apply to fire resistant cables?
Common standards include IEC 60331, BS 6387, and EN 50200. Check which standard your local building code requires.
How long can a fire resistant cable survive in a fire?
It depends on the cable and the standard. Common ratings are 15, 30, 60, 90, and 120 minutes of fire resistance.
Who should install fire resistant cables?
Only qualified electricians should install them. Use fire rated fixings and keep joints in fire rated enclosures.
Disclaimer: This guide gives general information only. Building codes and standards vary by country. Check your local building code and hire a qualified electrician for installation.
Last Updated: 6 November 2026