Armoured Cables – The Complete Guide

Introduction to Armoured Cables

Armoured cables are a crucial part of electrical installations, offering enhanced protection and durability in challenging environments. Whether you’re working in industrial, commercial, or residential settings, understanding armoured cables is essential for ensuring safety and compliance. In this comprehensive guide, we’ll explore everything you need to know about armoured cables, including their types, uses, benefits, installation tips, and more.

What Are Armoured Cables?

Armoured cables are electrical cables designed with an additional layer of protection to ensure that they can withstand mechanical stresses, chemical exposure, and environmental conditions. This protective layer, typically made of steel wire or aluminium, prevents the cable from damage caused by physical impact, crushing, and external threats.

Types of Armoured Cables

1. Steel Wire Armoured (SWA) Multi-Core Cables
   
   • Steel wire armoured cables are one of the most commonly used types of armoured cables. The steel armour offers higher mechanical protection, commonly used in multi-core cables, suitable for applications where strength is paramount., making it ideal for use in heavy-duty applications such as underground installations and industrial settings.
     
2. Aluminium Wire Armoured (AWA) Single Core Cables
   
   • AWA is non-magnetic and preferred for single-core cables where the steel wire armour would generate a magnetic field which could cause overheating in AC systems.
     
3. Aerial Bundled Cables (ABC)
   
   • Aerial bundled cables combine multiple conductors with insulation and armouring. They are ideal for overhead power lines where the cables need to be protected from the elements.
     

Key Benefits of Armoured Cables

• Enhanced Protection: The steel or aluminium armour provides excellent resistance to mechanical damage, making armoured cables suitable for use in harsh environments.
  
• Durability: Armoured cables are designed to last longer than non-armoured cables, reducing the need for frequent replacements.
  
• Safety: These cables are ideal for installations where safety is paramount, such as in industrial and outdoor applications.
  
• Versatility: Available in various configurations, armoured cables can be used in a wide range of applications, from residential wiring to large-scale industrial power systems.
  

Common Uses of Armoured Cables

• Industrial Installations: Armoured cables are often used in factories, plants, and construction sites where cables are exposed to potential mechanical damage.
  
• Underground Installations: Their durability makes them ideal for underground electrical wiring, providing protection from physical damage and environmental factors.
  
• Marine Applications: Armoured cables are used in ships and offshore platforms where they need to withstand corrosive conditions.
  
• Outdoor Power Lines: Aerial bundled cables are commonly used for overhead electrical lines in rural and urban areas.
  

How to Choose the Right Armoured Cable for Your Project

When selecting the right armoured cable, it’s essential to consider several factors:

• Voltage Rating: Ensure the cable is rated for the voltage level of your electrical system.
  
• Environmental Conditions: Choose a cable with the appropriate armour material (steel or aluminium) based on the potential exposure to physical damage or corrosive elements.
  
• Size and Flexibility: The size and flexibility of the cable should be chosen based on the installation space and the amount of current the cable needs to carry.
  

Armoured Cable Installation Tips

1. Proper Handling: Always handle armoured cables carefully during installation to avoid damaging the armour or conductors.
   
2. Use of Correct Tools: Ensure you use the right tools for stripping the cable without damaging the armoured protection.
   
3. Compliance with Standards: Make sure your installation complies with local electrical standards and regulations.
   
4. Protection During Installation: If you’re installing cables underground, make sure they’re adequately protected with suitable ducting and markers.
   

Maintenance and Care of Armoured Cables

Armoured cables generally require minimal maintenance. However, regular inspection is necessary to ensure that the cable remains in good condition and continues to perform safely. Look for signs of physical damage, wear, or exposure to chemicals, and replace the cable if necessary.

Why Choose Batt Cables for Your Armoured Cable Needs?

At Batt Cables, we pride ourselves on providing high-quality armoured cables that are built to last. With decades of experience in the industry, we offer a wide range of armoured cable options for every application. Whether you’re an electrical contractor or a business looking for reliable cables for your next project, we have the right solution for you.

• Wide Range of Products: From SWA to AWA and ABC cables, we provide an extensive selection to suit your needs.
  
• Expert Advice: Our team is always ready to help you select the right armoured cable for your specific requirements.
  
• Quality Assurance: All of our armoured cables are manufactured to meet the highest industry standards, ensuring reliability and safety.
  

External Links for Further Reading

To deepen your understanding of armoured cables and ensure compliance with relevant standards, we recommend reviewing the following resources:

• British Standards Institution (BSI) on Armoured Cables
  
• IEC Standards for Electrical Cables
  
• HSE Guidance on Electrical Safety in the Workplace
  

These resources provide detailed guidelines, standards, and best practices for working with electrical cables, ensuring safety and compliance in all applications.

Frequently Asked Questions (FAQ) About Armoured Cables

Q1: What is the difference between SWA and AWA cables?

• A single core armoured cable will always have a layer of aluminium wire armour (AWA) instead of steel wire armour (SWA). This is because the steel in SWA has a much lower conductivity/ higher resistance than aluminium. If it were used in a single core cable the magnetic field generated would induce an electric current in the armour (eddy current) and, combined with the increased resistance, can cause overheating in AC systems. AWA is non-magnetic and has a much better conductivity/ lower resistance, so can conduct these induced currents to earth more with a greater efficiency than steel. SWA is used in multicore armoured cables because the electromagnetic fields from the cores effectively cancel each other out, meaning less current is induced into the armour.
  

Q2: How long do armoured cables last?

• Armoured cables are designed for long-term use. Under proper conditions and maintenance, they can last up to 30 years or more, providing reliable service throughout their lifespan.
  

Q3: Can armoured cables be used outdoors?

• Yes, armoured cables are ideal for outdoor use due to their enhanced protection. However, they should be installed with proper sealing and support to avoid environmental damage, especially in coastal or industrial areas.
  

Q4: Can armoured cables be buried underground?

• Armoured cables are often used in underground installations because the armour provides protection from physical damage. It is crucial to install them in suitable ducting or use additional protective measures when burying them.
  

Q5: Do armoured cables need earthing?

• Yes, earthing is essential for armoured cables. The steel or aluminium armour is typically used for earthing purposes, helping to prevent electric shock hazards and ensuring safety in electrical systems.
  

Q6: Are armoured cables flexible?

• While armoured cables are designed for durability, they are available in various levels of flexibility. For applications requiring a more flexible option, consider choosing a cable with flexible armour or one specifically designed for that purpose.
  

Conclusion

Armoured cables are an essential part of modern electrical installations, offering safety, durability, and long-term reliability. By understanding the different types of armoured cables and their applications, you can make informed decisions for your projects. Batt Cables is here to provide the best quality armoured cables, backed by expert advice and exceptional customer service.