Decision to make
Select a cable construction that fits the electrical system, installation route, environment and governing project documents. A catalogue family or voltage label only narrows the search; it does not complete the design.
Inputs to collect
- Single-line diagram, cable schedule and tender specification.
- Nominal and highest system voltage, earthing arrangement and fault duty.
- Conductor material, cores, cross-section and permissible voltage drop.
- Installation method, ambient temperature, soil or duct conditions, water, UV, chemicals and mechanical risk.
- Required standard and edition, fire performance, approvals, test scope and end-client additions.
- Quantity, route length, drum limits, delivery sequence and Incoterm.
Selection sequence
- Resolve conflicts between drawings, BOQ and specification.
- Group line items by service, voltage and installation environment.
- Identify unresolved engineering decisions and mark them for confirmation.
- Request a project-matched construction and evidence list.
- Compare the returned proposal line by line before price comparison.
Common mistakes
Do not copy a model from another project, treat an IEC or BS number as the full requirement, or assume one certificate covers every factory and cable family. For Vietnam projects, review the tender, approval route and end-client requirements together.
RFQ output
Send one controlled package containing the latest BOQ, specification, drawings, required evidence and a list of open points. This gives the technical team a clear basis for product matching and quotation.
This guide supports RFQ preparation and does not replace project engineering or manufacturer technical confirmation.