Fire resistant Cable | Meteor Electical

What Is A Fire Resistant Cable?

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Fire and heat resistant cables are essential for maintaining power supply during emergencies. They are crucial in locations prone to fire-related incidents. In cases of fire, these cables ensure that emergency systems continue to function, safeguarding lives and property.

Places with extensive wiring often face significant fire risks. Power plants and large buildings use fire-resistant cables to prevent disastrous power failures during emergencies.

Fire-resistant cables are critical for emergency systems like fire alarms, emergency lighting, and voice alarm systems. These cables typically utilize non-flammable mica tape around copper wires, offering much-needed protection during a fire.

Unlike regular cables, fireproof cables are halogen-free, meaning they do not emit smoke, which can complicate emergency procedures. To achieve optimal performance, these cables should comply with EN50200 class PH60 standards. At Meteor Electrical, you'll find cables that meet various regulatory requirements, ensuring high safety standards.

What Is The Function Of Fire Resistant Cables?

Fire-resistant cables ensure that power is supplied to emergency systems during a fire. These systems include elevators, fire pumps, and smoke control equipment. Building safety protocols often require that these cables remain operational for at least 2 hours during an emergency.

• Allowing ample time for evacuation

• Enabling firefighters to tackle the blaze

• Facilitating effective communication during crises

A reliable fire-resistant cable must withstand these conditions for at least 2 hours. If your cable doesn't meet this requirement, it's crucial to consider a more reliable option.

What Are The Components Of Fire Resistant Cables?

Fire-resistant cables have six essential components:

• The conductor

  - Often made of annealed plain copper, this component provides high conductivity and withstands melting points up to 1083 degrees Celsius.

• The heat barrier

  - Positioned around the conductor, this cylindrical component is the first line of defense against high temperatures.

• The insulation

  - Made of fire-resistant cross-linked polyethylene, it protects the cables from the fire.

• The inner sheath

  - This component minimizes smoke emissions during a fire and consists of a low halogen, low smoke compound.

• The armour

  - Galvanized steel is used for additional protection.

• The outer sheath

  - Contains a similar low halogen, low smoke compound as the inner sheath.

What Is The Classification Of Flame Resistant Cables?

Flame resistant cables are typically divided into two classes: A and B.

Class A Flame Resistant Cables

Class A cables perform well in extreme fire conditions, enduring temperatures from 950 to 1000 degrees Celsius for up to 90 minutes. These cables are ideal for maintaining a power supply during severe fires.

Class B Flame Resistant Cables

Although slightly less robust than Class A, Class B cables can still handle temperatures between 750 and 800 degrees Celsius. They offer substantial protection and also last for 90 minutes, although improvements are being made to address some issues reported by electricians.

What Are The Best Materials For Fire Resistant Cables?

For top-notch fire-resistant cables, consider those with mineral insulation. MI (mineral insulated) cables are incredibly effective, enduring temperatures as high as 250 degrees Celsius.

What Cable Fire Resistant Specification Should You Consider?

There are various fire-resistant cables with unique specifications, which must withstand high-temperature conditions over extended periods. Consider these key specifications:

• Vinyl polyfluoroethylene insulation should handle temperatures from 70 to 105 degrees Celsius, with cross-linked polyethylene resistant to 90 degrees Celsius.

• Fluoroplastic insulation should withstand temperatures between 220 and 260 degrees Celsius.

• Low-halogen and low-smoke options should resist 70 degrees Celsius temperatures but can go up to 125 degrees for zero-halogen compounds.

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  Related links:
  How to Choose halogen free granules?

What Are The Types Of Fire Resistant Cables?

The two main types of fire-resistant cables are MI (mineral insulated) and MC (metal-clad) cables.

Mineral Insulated (MI) Fire Resistant Cables

MI cables date back to 1896, offering exceptional reliability and fire resistance. Comprising solid copper and magnesium oxide, these cables are explosion-proof, corrosion-resistant, and highly reliable under extreme conditions.

Their high performance during fires makes MI cables ideal for power plants at risk of severe fire scenarios. However, their complexity in installation and higher costs can be a downside. Nonetheless, the reliability and safety benefits often outweigh these limitations.

Metal-Clad (MC) Fire Resistant Cables

MC cables are easier to handle and install compared to MI cables. They are more flexible and economical, providing a two-hour fire rating. MC cables are well-suited for many applications due to their straightforward installation process and cost-effectiveness.

What Is The Difference Between Flame Retardant and Fire Resistant Cables?

The distinct difference between flame retardant and fire-resistant cables lies in their performance during a fire. Fire-resistant cables continue to supply power for at least 60 minutes, whereas flame-retardant cables merely resist fire spread.

Flame Retardant Cables

These cables self-extinguish within a limited time if ignited. Flame retardant cables prevent the fire's spread to other equipment, reducing the risk of extensive damage.

Key Differences

Fire-resistant cables are crucial for maintaining power during emergencies, whereas flame retardant cables are designed to reduce fire spread. Knowing these differences will help you make informed decisions based on your specific needs.

What Are The Best Fire Resistant Cables On The Market?

Here are three top fire-resistant cables available:

1. SWA Firesafe Cable

SWA firesafe cables are excellent for ensuring the integrity of power circuits. They meet the British Standard BS7846 and are used in schools, hospitals, and more.

1. Detector Cable

Perfect for residential buildings, these cables comply with ETCI regulations and are ideal for smoke, heat, and carbon monoxide detectors.

1. 2 Core+ Earth Red Fire Resistant Cable

This cable reel offers robust 100-meter long-lasting performance with a flexible installation process.

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