Caged armor is a protective construction in which armor wires are enclosed within a polyethylene jacket to increase a cable’s mechanical protection and tensile strength.
Caged armor is a specialized cable reinforcement method designed for environments with extreme mechanical stress, tension, or crushing forces. Unlike standard armored cable, where metallic armor is wrapped directly around the insulated core, caged armor positions the armor wires inside an external polyethylene jacket. This layered construction enhances durability and tensile strength, allowing cables to withstand harsh installation and operational conditions.
The polyethylene jacket secures the armor in place while offering added resistance to abrasion, moisture, and environmental wear. This combination of metallic reinforcement and polymer protection makes caged armor ideal for heavy-duty applications such as underwater, industrial, or defense installations. By isolating the armor within a protective layer, caged armor reduces the risk of corrosion and deformation, ensuring reliable performance in high-stress environments.
Cable designs utilizing caged armor may be governed by standards from IEEE, IEC, and UL, depending on the intended use. Submarine and high-performance armored cables are also regulated under international telecommunication and marine authorities to ensure safety and reliability in deep-sea or offshore applications.
The origins of armored cable design trace back to the 19th century with the creation of undersea telegraph and telephone cables. Early armor configurations evolved to resist damage from marine activity and environmental forces. The introduction of caged armor represented a significant advancement, embedding armor wires within polymer jackets to improve strength, flexibility, and corrosion resistance. Today, this design is a standard in submarine and offshore cabling where durability and protection are essential.