Custom Cable Assemblies: How to Spec and Order Coiled Cords

When Stock Cords Are Not Enough

Autac USA manufactures over 400 standard retractile cord configurations that cover the most common power, signal, and control applications. These stock part numbers ship quickly because the specifications — gauge, conductor count, jacket material, length, and termination — match what the majority of buyers need. But "majority" does not mean "all."

If you have ever searched for a coiled cord and found that nothing in any catalog quite matches your application, you are not alone. Custom cable assemblies exist because real-world equipment, environments, and compliance requirements do not always align with standard offerings. A medical device manufacturer may need a shielded 6-conductor retractile cord with a specific connector at one end and stripped tinned leads at the other. A defense contractor may require a coiled cable assembly built to a military specification with exact color coding across 12 conductors. A food processing plant may need a 10 AWG coiled power cord in a chemical-resistant TPE jacket at a retracted length that nobody stocks.

These are not edge cases. In our experience, roughly 30 to 40 percent of the cord orders we process at Autac involve some degree of customization. The good news is that custom does not mean complicated — it means the cord is built to your specifications rather than ours. This guide walks you through the entire process, from identifying what you need to receiving finished assemblies at your facility.

What Is a Custom Cable Assembly?

A custom cable assembly is a finished cord or cable product manufactured to a buyer's specific requirements rather than pulled from existing stock. In the context of retractile cords, a custom assembly means Autac builds the cord from raw materials according to your exact specifications for every parameter: wire gauge, conductor count, jacket material, jacket color, retracted length, extended length, tangent lead lengths, termination type, shielding, and any special testing or marking requirements.

The term "custom cable assembly" encompasses a broad range of products, from a simple modification of an existing standard cord (changing the plug type on one end, for example) to a fully engineered made-to-order cable that does not resemble anything in a catalog. The manufacturing process is fundamentally the same as stock production — the cord goes through the same winding, curing, and quality control steps — but the parameters are set to your specifications rather than our standard defaults.

Custom retractile cords are not prototypes or one-offs, though we do produce those as well. Most custom orders become recurring production items for OEM customers who integrate the cord into their own products, or for facilities that standardize on a specific cord configuration across their operations.

When You Need Custom Coiled Cords

There are several common scenarios where a stock retractile cord will not work and a custom cable assembly is the right path:

• Non-standard conductor count. Stock cords commonly come in 2, 3, 4, and 6-conductor configurations. If your application requires 5, 7, 8, 10, 12, or more conductors — or a combination of power and signal conductors in a single cord — that is a custom build.
• Specific wire gauge requirements. You may need a gauge that is not available in stock retractile cords for your conductor count, or you may need mixed gauges within the same cord (heavier gauge for power conductors, lighter gauge for signal lines).
• Unusual length requirements. Stock cords come in standard retracted lengths (typically 1, 2, 3, 4, 6, 8, and 10 feet). If your working distance demands a 5-foot retracted length, or a 14-foot retracted length, or tangent leads longer than 12 inches, that is a custom specification.
• Specific jacket material or color. Your application may require a jacket material not available in stock (polyurethane, TPR, clear PVC, or a specific flame-retardant compound), or a jacket color that matches your equipment branding.
• Custom terminations. Stock cords typically ship with standard NEMA plugs and connectors, or with stripped and tinned leads. If your cord needs to terminate in a specific connector (Molex, Deutsch, circular MIL-spec, medical-grade hospital plug, or any other connector type), that is a custom assembly.
• Shielding requirements. Electromagnetic interference (EMI) shielding adds a braided or spiral shield layer around the conductors. This is critical for medical instrumentation, audio equipment, and any application near motors, VFDs, or RF sources. Shielded retractile cords are almost always custom because the shielding configuration varies by application.
• Regulatory or industry specifications. Military specifications (MIL-DTL), UL listing to a specific standard, medical-device compliance, or automotive OEM specifications often dictate parameters that do not match standard catalog offerings.

The Custom Cord Specification Process

Specifying a custom retractile cord is a structured process. Each parameter you define narrows the design until every aspect of the finished cord is documented and agreed upon. Here is what you need to decide, in the order that typically makes sense:

1. Wire Gauge (AWG)

Wire gauge determines the current-carrying capacity of the cord and directly affects its physical size and flexibility. Autac manufactures custom coiled cords in any gauge from 10 AWG (heavy industrial) down to 26 AWG (miniature signal). Thicker gauges carry more current but produce a stiffer coil with a larger outside diameter. Lighter gauges yield compact, flexible coils suitable for data, signal, and low-power applications.

To select the right gauge, start with the amperage requirement of your device or circuit. Then consider voltage drop over the extended length of the cord — retractile cords can extend to five times their retracted length, and longer runs at lighter gauges increase voltage drop. When in doubt, go one gauge heavier than the minimum.

2. Conductor Count and Configuration

Conductor count is the number of individual insulated wires inside the cord jacket. A standard grounded power cord has 3 conductors (hot, neutral, ground). Control cables may have 4 to 25 conductors. Multi-circuit assemblies can combine power and signal conductors in a single retractile cord.

Conductor configuration also includes whether the conductors are tinned copper or bare copper. Tinned copper conductors resist corrosion and are easier to solder, making them standard for marine, medical, and harsh-environment applications. Bare copper is more conductive and less expensive, suitable for general industrial use.

3. Jacket Material

The jacket is the outer covering that gives the cord its retractile memory, environmental resistance, and physical durability. Autac manufactures custom coiled cords in a full range of jacket materials:

• PVC (polyvinyl chloride) — The most economical option. Good for indoor, climate-controlled environments. Available in virtually any color, including clear. Temperature range approximately -20°F to 150°F.
• TPE (thermoplastic elastomer) — More flexible than PVC with better low-temperature performance and chemical resistance. Good retractile memory. Increasingly popular as a general-purpose industrial jacket.
• Polypropylene — Lightweight, chemical-resistant, and economical. Commonly used for telephone and communications cords. Limited temperature range compared to TPE.
• Polyurethane (PUR) — Excellent abrasion resistance, oil resistance, and flexibility. Often specified for robotic and automated equipment applications where the cord endures repeated flexing and contact with moving parts.
• TPR (thermoplastic rubber) — Combines the processing advantages of thermoplastics with rubber-like flexibility and durability. Good chemical and UV resistance.
• Auta-Prene (proprietary neoprene alternative) — Autac's proprietary compound engineered for superior retractile memory, oil resistance, abrasion resistance, and wide temperature range. Designed as a neoprene replacement with improved manufacturing characteristics.

Jacket color is also a customizable parameter. Autac can produce coiled cords in any color, including clear (transparent) jackets for applications where visual conductor inspection or aesthetic transparency is required.

4. Retracted and Extended Length

Retracted length is the coiled (resting) length of the cord, not including the straight tangent leads at each end. Extended length is how far the cord stretches under use. The standard ratio is approximately 5:1 — a cord with a 3-foot retracted coil extends to roughly 15 feet.

Tangent leads are the straight (non-coiled) sections at each end of the cord. Standard tangent leads are 6 to 12 inches, but custom assemblies can have leads of any length. Some applications call for a short lead on the fixed end and a long lead on the device end, or no tangent lead at all on one side.

To calculate the retracted length you need: measure the maximum working distance from the cord's anchor point to the farthest point the device reaches. Divide by 5. That is your minimum retracted coil length. Add the tangent lead lengths to get the total retracted cord length. Always build in some margin — stretching a retractile cord to its absolute maximum repeatedly will shorten its service life.

5. Termination

Termination is how each end of the cord is finished. Common options include:

• Stripped and tinned leads — Bare conductor ends, tinned for corrosion resistance. The buyer attaches their own connectors.
• Standard NEMA plugs and connectors — NEMA 5-15P (3-prong plug), NEMA 5-15R (3-prong receptacle), NEMA 1-15P (2-prong), and others.
• IEC connectors — C13/C14, C15/C16, C19/C20 for equipment power connections.
• Hospital-grade plugs — Green-dot hospital-grade NEMA plugs for medical equipment, meeting UL 817 requirements.
• Circular connectors — MIL-spec circular connectors, Amphenol, or equivalent for military and aerospace applications.
• Custom connectors — Molex, Deutsch, JST, terminal blocks, ring terminals, spade terminals, or any buyer-specified connector. Autac can terminate to virtually any connector if the buyer provides the mating connector specification or supplies the connectors for assembly.

6. Shielding (If Required)

Shielding wraps the conductors in a conductive layer that blocks electromagnetic interference from entering or leaving the cord. Options include braided copper shield (the most effective, providing 85-95% coverage), spiral copper shield (more flexible, easier to terminate, typically 70-85% coverage), and foil shield (lightweight, 100% coverage but less durable mechanically).

Shielded retractile cords are somewhat stiffer and have a larger outside diameter than unshielded equivalents. The shield also slightly reduces the extension ratio. These trade-offs are worth accepting when signal integrity or regulatory compliance demands shielding.

Custom Cord Specification Checklist

Use this checklist when preparing to order custom retractile cord assemblies. Having these parameters defined before contacting Autac will accelerate the quoting process.

Lead Times and Minimum Order Quantities

One of the most common questions about custom cable assemblies is how long they take to produce and whether there is a minimum order quantity (MOQ). The answers depend on the complexity of the cord and the materials involved.

Lead Times

Standard custom orders using materials Autac keeps in stock (common gauges, standard PVC or TPE jacket compounds, common connectors) typically ship in 2 to 4 weeks from order confirmation. This includes winding, curing, termination, testing, and packaging.

Complex or specialty orders that require sourcing non-stock materials (uncommon jacket compounds, specialty connectors, or exotic conductor configurations) may require 4 to 8 weeks, primarily driven by material lead times from suppliers.

First-article and prototype orders are prioritized to give you a production sample for testing and approval before committing to a full run. Autac typically produces first articles within 1 to 3 weeks depending on material availability.

Minimum Order Quantities

Autac's approach to MOQs is practical, not arbitrary. Custom retractile cord manufacturing involves setting up a winding mandrel for the specific coil diameter and pitch, configuring the curing oven for the jacket material, and preparing termination tooling for the specified connectors. These setup steps take the same amount of time whether you are making 25 cords or 2,500.

For most custom configurations, the practical MOQ is 25 to 50 pieces. This quantity allows Autac to amortize setup time efficiently and offer competitive per-unit pricing. Smaller quantities — including prototypes and short evaluation runs — are available, but the per-unit cost will be higher to account for the fixed setup overhead.

For recurring production orders (OEM customers ordering the same custom cord repeatedly), Autac can establish blanket purchase orders with scheduled releases, keeping your inventory lean while guaranteeing production capacity and pricing stability over the contract period.

How Autac's Custom Cord Process Works

Here is what to expect when you order a custom cable assembly from Autac, from first contact to delivery:

1. Submit your requirements. Use our online quote request form or Build Your Cord configurator to provide your specifications. You can also call us directly at 800.243.3161 or email your requirements. Include drawings, specification documents, or reference part numbers if you have them.
2. Engineering review. Our engineering team reviews your specifications for manufacturability, identifies any potential issues (such as a gauge/conductor combination that will not fit in the requested coil diameter), and recommends alternatives where appropriate. This step typically takes 1 to 2 business days.
3. Quotation. Autac provides a detailed quote that includes per-unit pricing at your requested quantity, pricing at alternative quantity breaks, lead time, and a complete specification summary so both parties are aligned on exactly what will be produced.
4. First article (if applicable). For new custom designs, we produce a small number of sample cords for your testing and approval. You verify fit, function, and compliance before authorizing full production. Changes at this stage are normal and expected.
5. Production. Once the design is approved, your order enters our production schedule. Cords are wound on mandrels, heat-cured to set the retractile memory, terminated with your specified connectors, and individually tested for continuity, insulation resistance, and physical dimensions.
6. Quality control and shipping. Every cord is inspected against the approved specification before packaging. Cords ship with documentation that includes the part number, specification summary, and test results. Autac ships via your preferred carrier or can arrange freight for large orders.

Why Manufacturers Choose Autac for Custom Cable Assemblies

Autac USA has been manufacturing retractile cords in North Branford, Connecticut since 1947 — nearly eight decades of experience with the materials science, tooling, and production processes that make coiled cords work reliably over thousands of extension and retraction cycles.

Several factors set Autac apart in the custom cable assembly market:

• Vertically integrated manufacturing. Autac controls the entire process from raw conductor and jacket compound to finished, tested assemblies. There is no outsourcing or subcontracting. This gives us full control over quality, lead time, and cost.
• Material versatility. We maintain inventory of PVC, TPE, polypropylene, polyurethane, TPR, and our proprietary Auta-Prene compound. We work with any wire gauge from 10 to 26 AWG, tinned or bare copper, shielded or unshielded. If you can specify it, we can build it.
• Low MOQs with production-grade quality. Unlike contract manufacturers that only take large-volume orders, Autac produces custom cords in quantities as low as 25 pieces with the same tooling, processes, and quality standards used for high-volume production runs.
• 100% woman-owned business. Autac is a certified 100% woman-owned business, which can provide procurement advantages for buyers with supplier diversity requirements or government contracting set-asides.
• Engineering support. Our team does not just take orders — we help you get the specification right. If you are not sure which jacket material suits your environment, or whether your application needs shielding, or what gauge will carry your load over the extended distance, we will work through it with you.

Common Custom Cord Applications

To give you a sense of what "custom" looks like in practice, here are representative examples of custom cable assemblies Autac produces regularly:

• Medical device OEMs — 6-conductor shielded retractile cords with hospital-grade plugs, clear PVC jacket for visual inspection, exact length to match equipment arm reach.
• Industrial automation — 12-conductor control cables in polyurethane jacket for robotic cell pendant controllers, terminated with circular connectors on both ends.
• Defense and aerospace — MIL-spec coiled cable assemblies with specific conductor color coding, tinned copper conductors, and braided shield, built to exact drawing specifications.
• Food processing — Heavy-gauge power cords in oil-resistant Auta-Prene jacket with sealed connectors for washdown environments.
• Retail and POS — Miniature coiled cords in custom brand colors connecting handheld scanners to base stations, with specific connector terminations for proprietary equipment.
• Power tools — High-amperage SOW-rated retractile power cords with molded NEMA plugs and extra-long tangent leads for bench-mounted tools.

Getting Started

If you have a cord specification in mind — even a rough one — the fastest way to get a quote is to use our online tools. The Request a Quote form lets you describe your requirements in detail and attach drawings or specification documents. The Build Your Cord configurator walks you through the key parameters step by step and generates a specification summary automatically.

If you are not sure where to start, call us at 800.243.3161 during business hours (Monday through Friday, 8am to 5pm Eastern) and describe your application. Our team will help you define the specification and provide a quote, typically within 1 to 2 business days.

Custom cable assemblies are not a special service at Autac — they are a core part of what we do every day. Whether you need 25 pieces or 25,000, the process is the same: you tell us what you need, we build it to spec, and we deliver cords that work exactly as intended in your application.