Views: 29 Author: yaogupower.com Publish Time: 2026-09-29 Origin: Site
The most useful power cable quotation starts with a complete description of the duty and installation, not a product name alone. “YJV 4 × 95” leaves open the rated voltage, conductor material standard, insulation and sheath details, fire performance, route conditions, testing, lengths, and delivery basis. Each missing item forces a supplier to assume something. Those assumptions can make two prices impossible to compare and can become expensive after the order.
State the system voltage and required cable voltage designation, frequency for AC systems, number of phases, expected load, installation route, and whether the circuit is continuous, cyclic, or emergency duty. The project engineer should provide the required conductor size if already approved. If sizing support is requested, also provide design current, permissible voltage drop, short circuit current and duration, protective device details, and the sizing method or local code. A manufacturer cannot determine a safe conductor section from connected load alone.
For medium voltage cable, include system earthing arrangement, maximum operating voltage, screen requirements, and fault duties where relevant. Identify whether the cable is for a fixed installation, a moving machine, a photovoltaic DC run, or another special use. A generic low voltage power cable designation should not be transferred to a PV string or drag chain application without assessing the relevant product standard.
Write the conductor material, number of cores, nominal cross sectional area, conductor class, insulation material, metallic screen or shield if needed, inner covering, armor, outer sheath material, color, and any special properties. If the design is fixed, attach a drawing and call out the controlling revision. If alternatives are allowed, ask suppliers to price each as a separate line. A copper and an aluminum option should not be treated as interchangeable line items with only the same nominal area.
State the applicable standard and edition required by the contract, the destination's mandatory certification, and any customer specifications that add requirements. Fire claims need particular care: flame spread, circuit integrity during a defined fire test, smoke, and halogen emission are separate properties. Specify the intended test, performance class, and evidence needed. Descriptions such as “fireproof” are too vague for a comparable RFQ.
Tell suppliers whether the cable runs in air, on ladder or tray, in conduit, in ducts, or buried directly. Give maximum ambient temperature, expected grouping, burial depth, soil thermal resistivity where known, water exposure, sunlight or UV exposure, and chemical or oil exposure. For movable cables, include the travel distance, bend radius, speed, acceleration, and expected cycles. These details can change material choice, cable diameter, armor, and the ampacity calculation.
Route conditions also affect logistics. A congested plant may need shorter drums to reach an elevated cable tray, while an uninterrupted MV circuit may demand a single long length to avoid an extra joint. Mark any route with a strict bending or pulling limit for engineering review.
An RFQ should contain a cable schedule, not just a combined kilometer total. For every line, provide the construction, number of circuits, approximate route length, installation allowance, spare allowance, required net length per drum, and total ordered quantity. State whether length tolerance or manufacturing joints are allowed. If final route measurements are pending, identify the estimate and the date it will be frozen. That helps the supplier reserve capacity without presenting a false precision.
For export, specify maximum drum flange diameter, width, gross weight, and any forklift or crane limits at the destination. Ask the supplier to quote both the cable and the packing or drum treatment separately when freight matters. Confirm whether drums are returnable, nonreturnable, or locally disposable, and whether wood treatment certificates are required by the destination.
List the required routine tests, applicable type test evidence, any project sample tests, third party or customer witness points, and the required inspection and test plan. Ask for a technical data sheet, drawing, deviation list, production schedule, and dossier index with the offer. If a certificate is mandatory, name the issuing scheme or authority rather than requesting a generic “international certificate.” The project team should confirm which standards apply to each cable family.
Documentation language and copies matter in international procurement. Specify whether you need English labels, serial drum numbers, packing list, certificate of origin, test reports by drum or lot, and shipping marks. Missing paperwork can delay release even when the cable itself is compliant.
State destination, Incoterm and named place, currency, desired delivery date, validity period, inspection location, and payment terms requested. Ask whether copper or aluminum price is fixed at order acceptance or adjusted against an agreed market reference. If a metal price adjustment is used, define the reference date, source, quantity basis, exchange rate treatment, and document that triggers finalization. This prevents a quote from looking firm when its largest cost component is floating.
Request a line by line response showing unit price, extended price, applicable tax or export treatment, tooling or test charges, drum cost, lead time, minimum order quantity, and deviations. A supplier may price a special construction only for a full production batch. Knowing the minimum run early lets you combine compatible lengths or revise the schedule before award.
Send a spreadsheet with one row per cable construction and columns for item ID, application, rated voltage, cores, area, conductor, insulation, screen, armor, sheath, fire requirement, standard, length per drum, number of drums, total length, delivery priority, and remarks. Add the site conditions and commercial instructions in a short cover sheet. Attach drawings and the project specification as controlled documents, then ask the supplier to answer each line “compliant,” “deviation,” or “clarification needed.”
Before issuing the RFQ, check three common gaps: whether the chosen designation unambiguously defines the construction, whether the quantity can be shipped on the proposed drums, and whether the requested standard actually applies to the application. These checks save more time than repeated requests for a revised unit price.
Weak line: “XLPE power cable, 4 × 95 mm², 2,000 m, best price.” A stronger line states rated voltage, copper or aluminum conductor and class, XLPE insulation, sheath material, armor or screen if required, fire category and test, governing standard and edition, route and ambient, number of continuous circuits, cut length per drum, and the delivery basis. The project can still permit alternatives, but each needs a separate line with a written deviation. This reduces the number of revised quotations and makes technical bid review possible.
Ask for two prices only when there is an actual decision to make. For example, one base bid might follow the approved copper construction, while an aluminum option is explicitly subject to engineering review. Another comparison might use one continuous drum versus two approved drums if the route and site handling permit either. Do not ask ten speculative alternatives that cannot be evaluated; suppliers may respond with broad estimates rather than manufacturing commitments.
Finally, maintain a clarification log with question, answer, affected schedule line, drawing revision, and whether all bidders received the same information. If the buyer clarifies a fire test for only one supplier, the tender is no longer comparable. Reissue a corrected schedule after material changes rather than asking each supplier to interpret a chain of contradictory emails. This simple discipline improves both pricing accuracy and later contract administration.
If a cable schedule, drawing, and general specification conflict, tell bidders which controls and invite a formal query. A quotation based on the cheapest interpretation can look competitive while leaving a dispute at production. The final purchase order should list approved revisions and accepted clarifications in order of precedence. When the buyer later changes a route or fire requirement, issue a revised schedule to all affected parties and record the price and time impact before manufacture continues.
Read the inquiry as if you were a factory planner with no access to the project meetings. If you cannot tell what to manufacture, how to cut it, which tests apply, and where to deliver it, the RFQ is not ready for a firm price. Add those missing instructions or explicitly invite a clarification.
A buyer requests “0.6/1 kV, 4 × 120 mm² copper XLPE cable, 8 km.” Suppliers return different prices. One has assumed a PVC sheath without armor on eight one kilometer drums. Another has assumed armor and sixteen shorter drums. A third includes a bunched flame spread test and delivery to the port. The offers cannot be ranked by price per meter because they describe different products and logistics. A revised schedule specifying route, sheath, armor, fire performance, continuous lengths, and Incoterm turns the inquiry into a comparable tender.
Now consider the engineer's request for a conductor size recommendation. The load is 180 A, but the buyer has not supplied grouping, ambient temperature, route length, or permissible voltage drop. A responsible response is to offer a preliminary data sheet with stated assumptions and request missing inputs. If the supplier states a final section from one catalog table, the buyer should ask which installation method that table represents. The calculation may change when several loaded circuits share the same underground duct bank.
Attach a current cable schedule, single line diagram, route drawings, relevant technical specification, and destination approval rules. Put a revision number and date on each. If a document conflicts with another, state the order of precedence and ask bidders to flag conflicts. For a small purchase, a simple drawing and one page schedule can be enough; for an EPC package, a controlled transmittal and clarification register are appropriate.
Give a template for the supplier's response: offered construction, compliance status, assumptions, deviations, dimensions, conductor resistance, tests, lengths by drum, MOQ, lead time, price basis, and documents included. A free form quotation often leaves buyers searching through attachments for the same data. A structured return lets the engineer review compliance before procurement compares commercial terms.
First, “copper cable” does not state whether conductors are solid, stranded, or flexible to the required class. Second, “XLPE PVC” identifies insulation and sheath but not screen, armor, fire grade, or the complete product standard. Third, “outdoor” can mean sheltered rain, full sun, standing water, or flooded duct, each with different exposure. Ask the project team to describe the actual duty in plain language as well as model codes.
The best inquiry also says what is intentionally open. A buyer might ask for copper as the base bid and aluminum as a separately priced alternative, or allow two drum allocation options. State whether those are alternatives for approval rather than permitting suppliers to choose an undocumented substitute. This keeps the comparison fair while allowing engineering value from bidders.
Usually a budget indication is possible for a standard item, but it will contain assumptions about voltage, standard, construction, packing, and delivery. Ask the supplier to print those assumptions clearly. A firm project quotation needs the full specification and cut length plan.
Yes, if the project wants a supplier sanity check or possible alternative. The manufacturer may flag an apparent mismatch, but final design approval still belongs to the qualified engineer. Avoid asking the supplier to warrant current rating without route conditions.
Provide the estimated total and anticipated number of continuous circuits, plus a date for route measurement freeze. Ask for a price formula and MOQ basis that can accommodate a defined variation. Do not assume arbitrary changes in drum cuts are possible after production begins.
Name flame spread, circuit integrity, smoke, and halogen requirements separately, with the accepted tests and editions. The phrase “fireproof” cannot tell a supplier what to manufacture or what evidence the inspector will accept.
For a line by line cable quotation, send your schedule, installation conditions, document requirements, and target delivery date to Yaogu Power. Our team can review missing specification inputs before preparing the offer.
Website: https://www.yaogupower.com/ | Email: sales@yaogugroup.com
