A vague cable RFQ wastes time on both sides. Suppliers spend hours asking clarifying questions before they can quote, and buyers wait days longer than necessary for pricing and lead time information. The solution is a well-structured request for quotation that gives the manufacturer everything they need to price the job accurately on the first pass. This guide explains what information to include in a cable RFQ, how to structure the document, what to expect from a good response, and how to handle the back-and-forth that determines whether a sourcing relationship will work long-term.

What a Cable Manufacturer Needs to Quote Accurately

Cable and wire harness manufacturers need to understand three things to give you a real price: what you are buying, how many you need, and when you need it. Everything else in an RFQ supports those three questions.

Product Specification

The specification defines exactly what you want. For a simple cable assembly, this means:

Cable type: Is this an HDMI cable, a USB-C cable, a power cord, a wire harness, an automotive cable, a TPU spiral cable, or an industrial cable assembly?
Cable standard: Does the cable need to meet a specific standard (e.g., UL 2464, IEC 60227, SAE J1128, ÖLFLEX equivalent)?
Conductor specification: Number of conductors, wire gauge (AWG or mm²), whether solid or stranded, and conductor material (tinned copper, bare copper, CCA)
Shielding: Braided shield, foil shield, combination, or unshielded
Jacket material: PVC, TPU, rubber, silicone, or nylon
Overall cable length: With tolerance (e.g., 1.5 m ±50 mm)

For wire harnesses, the specification also includes a pinout or circuit diagram, a routing description or layout drawing, the connector models and part numbers at each connection point, and the wire colors and labels if required.

Connector Information

Connector specification is where many RFQs fall short. Stating “USB-C connector” is not enough. A complete connector specification includes:

Connector manufacturer and part number
Termination method: crimp, solder, over-molding, or IDC
Shell material and finish: nylon, zinc alloy, aluminum, plating type
IP rating if environmental sealing is required
Keyway or orientation requirements if the connector needs to mate in a specific way

If you do not have a specific connector part number but have a physical sample or a connector drawing, send it. Manufacturers who regularly source from Amphenol, Molex, TE Connectivity, Hirose, and similar vendors can cross-reference from a photo or dimensional drawing in most cases.

Quantity and Volume Forecast

Cable assembly pricing changes significantly with quantity. A 100-piece order and a 10,000-piece order may use the same materials, but the setup time, tooling cost, and overhead allocation per unit are very different. Include in your RFQ:

The initial order quantity
Expected repeat order frequency (monthly, quarterly)
Annual volume forecast if available
Whether you require a sample set before mass production, and how many samples

Providing a realistic volume forecast allows the manufacturer to propose a pricing structure that reflects actual production economics rather than worst-case assumptions.

Required Delivery and Lead Time

Specify when you need the first delivery and whether there is a hard deadline driving that date. If you have flexibility, say so. Rigid delivery requirements without lead time flexibility add a premium to cable production because the manufacturer may need to prioritize your job over existing work or hold component inventory at risk.

Compliance and Certification Requirements

Compliance requirements affect material selection, testing scope, and documentation obligations. Missing this information in the RFQ creates surprises at the approval stage. Common compliance items to specify:

RoHS: Restriction of Hazardous Substances — required for electronic products sold in the EU and UK, and expected by many global buyers regardless of destination market
REACH SVHC: Chemical substance declaration — required for EU market compliance; triggers documentation requirements if cable materials contain substances of very high concern above threshold limits
CE marking: Required for cables and assemblies sold as components in regulated end products in the EU
UL certification: Required for cables installed in North American electrical systems covered by the National Electrical Code (NEC)
ISO 9001: Manufacturing quality management system — important for buyers who require documented quality processes and traceability

If your product requires testing documentation such as a test report, a declaration of conformity, or a Certificate of Compliance, specify this in the RFQ so the supplier can include it in the quote.

Packaging and Labeling Requirements

Packaging is often omitted from cable RFQs until the end of the process, which can cause delays or cost surprises when it turns out the required packaging differs from the supplier’s standard. Include packaging requirements in the initial RFQ:

Pack format: Bulk polybag, retail blister, individual box, or distributor carton
Private label: Whether you require your brand name, logo, or product number printed on packaging
Barcode and label: EAN/UPC barcode requirements, SKU labeling, and label placement
Carton marking: Country of origin marking, carton quantity, and any export documentation labeling required by your customs broker

For B2B distributors buying in volume, the cost of retail packaging and private labeling can represent 20–40% of total unit cost on lower-cost cables. Knowing this upfront prevents budget surprises.

Drawing and Sample Submission

A reference drawing, sample assembly, or both is the fastest way to close the gap between what you mean and what the manufacturer will produce.

What to Include in a Drawing

A cable drawing does not need to be a formal engineering document. A dimensioned sketch showing cable length, connector locations, wire count, jacket diameter, and any overmold or strain relief geometry is sufficient for most quoting purposes. PDF, DXF, or a high-resolution photograph of a sample with a ruler in frame all work in practice.

Sending Samples

Physical samples are particularly valuable for wire harness assemblies and multi-branch cable configurations where a drawing may not fully capture the routing and branch lengths. When sending samples, include a covering note that states which dimensions or features you want to preserve exactly and which are flexible if the supplier proposes an alternative.

What a Good Cable RFQ Response Looks Like

A well-structured RFQ response from a capable manufacturer should include:

Unit price at the stated quantity: Including material, assembly, testing, and standard packaging
Price breaks: For higher quantities if applicable
Lead time: From order placement to delivery, distinguishing sample lead time from mass production lead time
Sample cost: Whether samples are charged and whether the cost is deducted from the first bulk order
MOQ: Minimum order quantity and whether flexibility exists for initial orders
Payment terms: Standard terms such as T/T 30% deposit with balance before shipment
Clarification questions: Any specification items that need confirmation before a firm quote can be given

Responses that are vague on lead time, omit testing scope, or provide a price without confirming the specification are not complete quotes. They are opening bids that require further negotiation.

Common Mistakes That Delay Quoting

Based on how RFQs are typically handled by cable manufacturers, the following are the most common reasons quoting takes longer than it should:

Missing Connector Part Numbers

Saying “USB-C 3.1 Gen 2” describes a protocol, not a connector. There are dozens of USB-C connector designs from different manufacturers, with different shell dimensions, keying features, cable-side termination styles, and price points. A part number or a photograph of the mating receptacle on the target device is needed to select the correct connector.

No Quantity or Volume Forecast

A manufacturer who receives a spec with no quantity information has to price at a conservative (high) per-unit cost because they cannot make assumptions about production economics. Adding even a rough annual volume estimate (“approximately 2,000 to 5,000 pieces per year”) allows the supplier to structure a more competitive response.

Ambiguous Compliance Language

Stating “must be compliant” without specifying which directive, which test standard, and which market allows the supplier to interpret compliance requirements in the cheapest possible way. Be explicit: “CE marked, RoHS 3 compliant, with Declaration of Conformity provided” is unambiguous.

Length or Dimension Not Specified

Many buyers specify a nominal cable length without tolerance or without clarifying the measurement reference (end-to-end of cable, face of connector to face of connector, or end of overmold to end of overmold). Defining the measurement method and tolerance prevents disputes at the incoming inspection stage.

How to Evaluate and Compare Multiple Cable Quotes

When you receive quotes from multiple suppliers, price per unit is only one variable. Compare the following:

Specification compliance: Did the supplier quote to the exact specification or propose substitutions? Substitutions are not always inferior but need to be evaluated on their merits.
Lead time: A lower price with a 10-week lead time may have a higher total cost than a higher price with a 4-week lead time if your inventory carrying costs are significant.
Testing scope: What electrical tests are included? Is a test report available per batch?
Sample process: How many rounds of samples before mass production? What is the approval timeline?
References and factory audit: Can the supplier provide references from buyers in your industry, and are they open to a factory audit or third-party audit?

The lowest-priced quote that arrives fastest is not always the best choice. A supplier who asks detailed clarifying questions before quoting—rather than guessing—is more likely to produce to specification on the first production run. Nexharn provides industrial cable assembly manufacturing and can assist with RFQ preparation for standard and custom cable programs. If you are ready to start, visit our contact page to submit your specifications.

Related resources: HDMI cable products

How to Write a Cable RFQ That Gets a Fast Accurate Quote