Metal wrapped wire is a type of electrical wire or cable that features a protective layer of metal wrapped around its insulated conductors. This metal layer can serve different purposes—such as mechanical protection, grounding, or shielding against electromagnetic interference (EMI/RFI)—depending on the wire’s design.
metal wrapped wire
It’s commonly found in industrial, commercial, and specialty applications where durability and safety are top priorities.
Key Characteristics of Metal Wrapped Wire
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Protective Metal Layer: Usually aluminum or steel tape, braided copper, or interlocked metal armor.
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Durability: Provides resistance against crushing, abrasion, and rodent damage.
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Shielding: Reduces electromagnetic interference in sensitive signal and data cables.
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Grounding: The metal wrap can act as an equipment grounding conductor in some designs.
Types of Metal Wrapped Wire
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Armored Cable (AC Cable):
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Uses a flexible spiral steel wrap.
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Commonly used in older residential or commercial installations.
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Metal-Clad Cable (MC Cable):
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Features interlocked aluminum armor around multiple conductors.
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Widely used in modern commercial and industrial wiring.
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Shielded Wire / Coaxial Cable:
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Wrapped with braided copper or aluminum foil.
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Used for data transmission, audio/video, and communication systems.
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Flexible Conduit with Wires Inside:
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Some installations use a corrugated metal sheath (flex conduit) with wires pulled inside.
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What Is Metal Wrapped Wire Used For?
1. Power Distribution
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Commercial buildings
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Industrial facilities
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Apartments and condos (where code requires armored wiring)
2. Control and Signal Circuits
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HVAC systems
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Machinery controls
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Security and fire alarm wiring
3. Data and Communication
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Coaxial cables for TV and internet
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Shielded cables to prevent EMI in sensitive electronics
4. Special Environments
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Exposed installations in basements, garages, and warehouses
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Areas requiring additional protection from physical damage
Benefits of Metal Wrapped Wire
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Safety: Extra layer of mechanical protection
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EMI Shielding: Better performance for signal transmission
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Code Compliance: Meets NEC/CSA standards for protected wiring
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Versatility: Available in many constructions for different applications
Conclusion
Metal wrapped wire is an umbrella term that covers armored, shielded, and metal-clad wiring solutions. Whether used for power distribution, communication, or control systems, its metal wrapping provides durability, safety, and shielding that standard plastic-jacketed wires cannot offer.
When selecting metal wrapped wire, always consider:
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Environment (indoor, outdoor, wet, or dry)
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Application (power, signal, or data)
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Local electrical codes
