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Spiral Cables and Sub-Assemblies
Spiral cables are coiled electrical wires that expand like mechanical springs when force is applied. Their helical design enhances flexibility and durability. They typically consist of copper conductors wrapped in plastic insulation, covered with a protective jacket and connected to metal terminals at each end. The way these parts are arranged within the coil affects performance, durability and cost.
The copper or copper alloy (tin bronze, beryllium copper) conductors in spiral cable assemblies carry power and data signals between connection points. The gauge of the conductors determines current capacity and resistance to fatigue from repeated bending. Most spiral cable assemblies use stranded wires for flexibility and higher amperage loads, while solid conductors suit static applications. Spiral conductors are often shielded to protect signals from electromagnetic interference, and the wires are arranged in a way that distributes stress evenly during movement.
Durable spiral cables have outer jackets that protect against chemicals, oil exposure, mechanical stress and hot or cold temperatures. The jacket material influences where the cable works best, with PVC coverings working well in offices or light factory settings, and rubber or polyurethane (PUR) coatings lasting longer on heavy machinery, robotic arms or industrial environments. Some jacket materials flex better, while others have greater elasticity and resist abrasions. The conductor type and arrangement also impacts reliability and durability, with stranded wires better for frequent bending and solid ones suited to static applications.
Most spiral cables safely extend up to 3 to 3.5 times their retracted length before reaching maximum stretch. Specialized designs can reach 4:1 or 7:1 ratios, but increasing the extension range reduces the cable's ability to spring back and may impact its lifespan. The conductor arrangement also affects how flexible the wires are, with twisted pairs offering better flexibility and resistance to signal interference.
Quality spiral cable assemblies are tested for mechanical flex and cycle testing, tensile strength and environmental resistance. They also undergo tests to verify electrical continuity, abrasion resistance and resistance to oils, chemicals and temperature extremes. They typically have a UL certification and RoHS compliance label to show they meet industry standards.
Spiral cable sub assemblies make wiring tasks easier by reducing wire tangling, preventing tripping hazards and making them easy to work with. They are ideal for moving systems or devices that require frequent repositioning, including automotive airbag modules and steering wheel connections.
Spiral cable sub assemblies have smooth, round and streamlined wire wraps that minimize abrasion or pinching. This improves safety, prevents short circuits and maintains a professional appearance in exposed applications. Color coding or custom connectors improve identification and simplify installation and maintenance tasks, while a variety of sheath materials reduces costs. Spiral cable also simplifies re-routing, with individual wires easily accessible from the bundle and easy to replace or remove. This helps technicians improve system efficiency and reduces service time and labor costs. Contact an experienced spiral cable supplier to request samples, technical specifications or expert guidance on high-motion and critical safety applications.
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