Armoured Cables: A Comprehensive Guide to Protection and Security

Armoured cables, also known as armoured electrical cables, are designed to provide enhanced protection against external damage, making them an ideal choice for demanding applications where reliability and safety are paramount. This article delves into the world of armoured cables, highlighting their advantages, applications, and best practices for installation and maintenance.

Understanding Armoured Cables

Armoured cables feature an additional layer of protection beyond the typical insulation and sheathing found in standard cables. This protective layer, known as the armour, typically consists of galvanized steel wires or aluminium strips arranged in a spiral or concentric pattern. The armour serves as a barrier against impact, crush, and penetration, increasing the cable's resistance to external hazards.

Advantages of Armoured Cables

The armouring provides numerous advantages over standard cables, making it a preferred choice in various situations:

• Enhanced Mechanical Protection: The armour serves as a shield against physical damage caused by impact, crush, or puncture. This is particularly important in areas with high traffic or where cables are exposed to potential mechanical abuse.

• Improved Resistance to Rodents and Pests: The armouring acts as a deterrent against rodents and pests, preventing them from chewing through the cable and causing damage. This is crucial in areas where rodent infestations are common or where pests pose a risk to electrical systems.

• Increased Safety: The armouring provides an additional level of protection against electrical hazards. In the event of a fault or short circuit, the armour helps prevent the spread of fire or electrical shock.

  

• Extended Lifespan: Protected from external damage, armoured cables typically have a longer lifespan compared to standard cables, reducing the need for frequent replacements and maintenance.

  

Applications of Armoured Cables

Armoured cables find widespread use in a variety of applications, including:

• Industrial Settings: Factories, warehouses, and other industrial facilities often require cables that can withstand harsh conditions and heavy machinery. Armoured cables can provide reliable power distribution in these demanding environments.

• Outdoor Installations: Armoured cables are well-suited for outdoor applications where cables are exposed to weather conditions, such as underground burial, overhead lines, or marine environments. The armouring protects the cable from moisture, corrosion, and other environmental factors.

• Hazardous Locations: In areas where there is a risk of explosion or fire, armoured cables are essential for ensuring the safety of personnel and equipment. The armouring prevents sparks or arcs from igniting surrounding materials.

• Security and Surveillance: Armoured cables are often used in security and surveillance systems to protect power and data lines from tampering or vandalism. The armouring acts as a deterrent against malicious attacks.

Types of Armoured Cables

Armoured cables can be classified into two main types:

• Single Wire Armoured (SWA): This type of armouring consists of individual galvanized steel wires arranged in a spiral or concentric pattern around the cable core. SWA cables are commonly used in industrial and outdoor applications.

• Double Wire Armoured (DWA): DWA cables feature an additional layer of armouring, with two layers of galvanized steel wires arranged in opposite directions. This provides increased mechanical protection and resistance to crush and impact. DWA cables are typically used in high-risk environments or where extreme protection is required.

Installation and Maintenance of Armoured Cables

Proper installation and maintenance are crucial to ensure the optimal performance of armoured cables:

Installation

• Avoid Sharp Bends: When bending armoured cables, always maintain a minimum bend radius to prevent damage to the armouring and internal components. Refer to the manufacturer's specifications for specific bending guidelines.

• Securely Anchor: Use appropriate cable supports and fixings to securely anchor armoured cables in place. Inadequate support can lead to cable movement and potential damage.

• Grounding: Ground the armouring of armoured cables to provide protection against electrical faults and lightning strikes. Proper grounding practices are essential for safety.

Maintenance

• Regular Inspection: Regularly inspect armoured cables for any signs of damage, such as dents, cuts, or corrosion. Promptly repair or replace any damaged cables to prevent potential hazards.

• Thermal Monitoring: Monitor the operating temperature of armoured cables, especially in high-current applications. Excessive heat can indicate potential problems and requires further investigation.

• Environmental Protection: Protect armoured cables from environmental factors such as moisture, corrosion, and sunlight by using appropriate conduits or enclosures.

Tips and Tricks for Using Armoured Cables

• Choose the Right Cable: Select the appropriate type of armoured cable for the specific application and environmental conditions. SWA cables may suffice for general-purpose use, while DWA cables offer enhanced protection in high-risk environments.

• Handle with Care: Avoid rough handling or dragging armoured cables, as this can damage the armouring. Use proper lifting techniques and equipment when moving or installing cables.

• Protect Against Corrosion: In harsh environments, consider using galvanized or stainless steel armoured cables to prevent corrosion. Alternatively, apply protective coatings or sealants to the armouring for added protection.

Common Mistakes to Avoid with Armoured Cables

• Overbending: Excessive bending can weaken the armouring and internal components. Always follow manufacturer's guidelines for minimum bend radius.

• Insufficient Grounding: Inadequate grounding can compromise the safety of the electrical system. Ensure that the armouring is properly grounded according to recommended practices.

• Neglecting Environmental Protection: Exposing armoured cables to harsh conditions without proper protection can lead to premature failure. Use appropriate conduits or enclosures to protect the cables from moisture, corrosion, and sunlight.

Why Armoured Cables Matter

Armoured cables play a vital role in ensuring the reliability, safety, and longevity of electrical systems. Their enhanced protection against mechanical damage, pests, and environmental hazards makes them an indispensable component for demanding applications. By understanding the advantages, applications, and best practices associated with armoured cables, electrical professionals can ensure optimal performance and minimize risks in any electrical installation.

Benefits of Using Armoured Cables

The use of armoured cables offers numerous benefits, including:

• Reduced Downtime: Enhanced protection reduces the risk of damage, leading to less downtime and increased productivity.

• Protection of Critical Systems: Armoured cables safeguard critical electrical systems from damage, ensuring their reliability and preventing costly interruptions.

• Improved Safety: The armouring provides an additional layer of protection against electrical hazards, reducing the risk of shock or fire.

• Long-Term Savings: The extended lifespan of armoured cables minimizes replacement costs and maintenance expenses over the long run.

Call to Action

If you are looking for reliable and robust cables for your electrical installations, consider using armoured cables. Their enhanced protection and long lifespan make them a worthwhile investment for ensuring the safety, performance, and longevity of your electrical system.

Additional Information

Table 1: Armoured Cable Types and Applications

Table 2: Armoured Cable Advantages and Benefits

Table 3: Armoured Cable Installation and Maintenance Tips